Concentric springs, surge phenomenon in spring, helical torsion, spiral springvaibhav tailor
Concentric springs consist of two or more springs placed inside one another. This arrangement increases the overall force and allows tuning of the spring stiffness. Concentric springs can be of equal or unequal lengths. Surge phenomenon occurs when a spring absorbs a suddenly applied load, causing a compression wave to travel along the coils. If the load fluctuations match the wave's travel time, resonance occurs, potentially damaging the spring. Torsion springs use twisting forces rather than compression or tension. Spiral springs store energy through nearly linear winding, making them suitable for small rotational counterbalances.
Torsion & springs strength of materials BY G.DINESHPIRANDinesh Piran-Gdp
The document discusses torsion and springs. It first discusses torsion in rotating shafts used to transmit power in industries. When a shaft twists, it induces shear stress in addition to bending and axial stresses. It then discusses different types of springs used to absorb energy through resilience. Springs can be classified based on the type of resilience (bending or torsion), construction (laminated or helical), and the nature of load carried (compression or tension). Helical springs are further classified as closely or openly coiled. Compression springs have coils that close under load while tension springs have coils that open under load.
Springs are elastic machine elements that store mechanical energy and return to their original shape when a deforming force is removed. There are several types of springs classified by the direction of force exerted, including push, pull, and radial torque springs. Common spring materials include hard-drawn wire, oil-tempered wire, chrome vanadium, and music wire. Key parameters for helical compression springs include wire diameter, mean coil diameter, spring index, free length, compressed length, and solid length. Springs experience both shear stresses from torsion and bending of the coils as well as shear stresses from axial forces.
- The document discusses different types of springs including helical compression springs, helical extension springs, helical torsion springs, and multileaf springs.
- It describes the functions and applications of springs which include absorbing shocks and vibrations, storing energy, and measuring forces.
- Key terms related to helical spring design are defined such as wire diameter, mean coil diameter, spring index, solid length, compressed length, free length, and pitch. Stress and deflection equations for helical spring design are also presented.
Springs are elastic bodies that can be twisted, pulled, or stretched by an applied force and return to their original shape when the force is released. There is physics behind springs in that when stretched or squashed, a spring creates an opposite force to return to its initial position. Springs are manufactured through processes like winding, grinding, calibration, and coating and can be made from materials like steel, titanium, and copper. Common types of springs include helical tension springs, compression springs, torsion springs, leaf springs, and gas springs. Springs are widely used to avoid vibration, apply forces, and control motion in machines.
A REVIEW ON HELICAL COMPRESSION SPRING TO DESIGN A SHOCK ABSORBER OF BIKEJournal For Research
A spring is an elastic object used to store mechanical energy. A shock absorber is a mechanical device designed to smooth out or damp shock impulse & dissipate kinetic energy. In this paper there is reviewed some papers on suspension system. The aim of this review paper is to represent a general study on the analysis of spring to fulfil the requirement of suspension system.
Mechanical Springs - stresses & Deflection of compression springsnarendra varma
This document discusses stresses and deflection in helical springs. It begins by listing different types of springs and their applications, such as helical springs used in suspension and conical springs used in electrical contacts. It then discusses factors to consider when selecting spring material, such as load, stress range, mass/volume limitations, fatigue life, and environment. Common spring wire materials are also outlined. The document proceeds to provide equations for calculating stresses in helical springs made of circular wire under an axial load. It further discusses deflection, buckling, and surge of compression springs. References for additional information are provided at the end.
The document discusses various topics related to springs including types of springs, materials used for springs, stresses in springs, deflection of springs, buckling of springs, energy stored in springs, springs connected in series and parallel, leaf springs, and torsion springs. It provides definitions and key terms for different types of springs such as helical springs, conical springs, volute springs, torsion springs, leaf springs, and disc springs. It also discusses common materials used for helical springs and factors that influence material selection such as service conditions.
Concentric springs, surge phenomenon in spring, helical torsion, spiral springvaibhav tailor
Concentric springs consist of two or more springs placed inside one another. This arrangement increases the overall force and allows tuning of the spring stiffness. Concentric springs can be of equal or unequal lengths. Surge phenomenon occurs when a spring absorbs a suddenly applied load, causing a compression wave to travel along the coils. If the load fluctuations match the wave's travel time, resonance occurs, potentially damaging the spring. Torsion springs use twisting forces rather than compression or tension. Spiral springs store energy through nearly linear winding, making them suitable for small rotational counterbalances.
Torsion & springs strength of materials BY G.DINESHPIRANDinesh Piran-Gdp
The document discusses torsion and springs. It first discusses torsion in rotating shafts used to transmit power in industries. When a shaft twists, it induces shear stress in addition to bending and axial stresses. It then discusses different types of springs used to absorb energy through resilience. Springs can be classified based on the type of resilience (bending or torsion), construction (laminated or helical), and the nature of load carried (compression or tension). Helical springs are further classified as closely or openly coiled. Compression springs have coils that close under load while tension springs have coils that open under load.
Springs are elastic machine elements that store mechanical energy and return to their original shape when a deforming force is removed. There are several types of springs classified by the direction of force exerted, including push, pull, and radial torque springs. Common spring materials include hard-drawn wire, oil-tempered wire, chrome vanadium, and music wire. Key parameters for helical compression springs include wire diameter, mean coil diameter, spring index, free length, compressed length, and solid length. Springs experience both shear stresses from torsion and bending of the coils as well as shear stresses from axial forces.
- The document discusses different types of springs including helical compression springs, helical extension springs, helical torsion springs, and multileaf springs.
- It describes the functions and applications of springs which include absorbing shocks and vibrations, storing energy, and measuring forces.
- Key terms related to helical spring design are defined such as wire diameter, mean coil diameter, spring index, solid length, compressed length, free length, and pitch. Stress and deflection equations for helical spring design are also presented.
Springs are elastic bodies that can be twisted, pulled, or stretched by an applied force and return to their original shape when the force is released. There is physics behind springs in that when stretched or squashed, a spring creates an opposite force to return to its initial position. Springs are manufactured through processes like winding, grinding, calibration, and coating and can be made from materials like steel, titanium, and copper. Common types of springs include helical tension springs, compression springs, torsion springs, leaf springs, and gas springs. Springs are widely used to avoid vibration, apply forces, and control motion in machines.
A REVIEW ON HELICAL COMPRESSION SPRING TO DESIGN A SHOCK ABSORBER OF BIKEJournal For Research
A spring is an elastic object used to store mechanical energy. A shock absorber is a mechanical device designed to smooth out or damp shock impulse & dissipate kinetic energy. In this paper there is reviewed some papers on suspension system. The aim of this review paper is to represent a general study on the analysis of spring to fulfil the requirement of suspension system.
Mechanical Springs - stresses & Deflection of compression springsnarendra varma
This document discusses stresses and deflection in helical springs. It begins by listing different types of springs and their applications, such as helical springs used in suspension and conical springs used in electrical contacts. It then discusses factors to consider when selecting spring material, such as load, stress range, mass/volume limitations, fatigue life, and environment. Common spring wire materials are also outlined. The document proceeds to provide equations for calculating stresses in helical springs made of circular wire under an axial load. It further discusses deflection, buckling, and surge of compression springs. References for additional information are provided at the end.
The document discusses various topics related to springs including types of springs, materials used for springs, stresses in springs, deflection of springs, buckling of springs, energy stored in springs, springs connected in series and parallel, leaf springs, and torsion springs. It provides definitions and key terms for different types of springs such as helical springs, conical springs, volute springs, torsion springs, leaf springs, and disc springs. It also discusses common materials used for helical springs and factors that influence material selection such as service conditions.
This document discusses the design of helical springs against static loading. It defines what a helical spring is and its functions of storing and releasing energy and absorbing shock. The key design considerations for helical springs are described such as required space, forces, tolerances, costs and environment. Formulas are provided for calculating stresses in the spring from torsional and direct shear forces. Common spring materials and effects of end treatment are also summarized. Buckling is discussed and the formula provided. Parameters calculated by the design module are outlined such as spring dimensions, load rating and stresses. Spring testing machines are also briefly mentioned.
1) Hollow shafts can be used where weight reduction is important since only the outer material of solid shafts is stressed to the allowable limit, wasting the inner material.
2) The general torsion equation for solid shafts also applies to hollow shafts under the same assumptions.
3) Helical springs come in closed coil and open coil varieties and are used to absorb shocks and resist sudden forces between devices. They are made of spring steel or stainless steel wire.
Spring Design, Helical Springs, compression & Extension springs, spring design procedure leaf spring, multi-leaf springs design process and analysis, Role of Spring index in spring design. Springs for Fluctuating loads.
This document discusses helical springs, leaf springs, and columns and struts. It provides details on:
1) Deflection calculations for helical springs under axial load and twisting moment using energy methods. Stress calculations for open and closed coil springs.
2) Design and load calculations for leaf springs used in vehicles. Assumptions made for semi-elliptic and quarter-elliptic leaf spring shapes.
3) Buckling behavior of columns and struts. Calculations for buckling loads using slenderness ratio and considerations for end conditions.
1) Stress concentration is the localization of high stresses due to irregularities in a component's geometry. It can be quantified using a stress concentration factor.
2) Factors that cause stress concentration include variations in material properties, concentrated loads, abrupt changes in cross-section, and discontinuities.
3) Remedies for reducing stress concentration include adding fillets, undercutting notches and shoulders, drilling additional holes, and reducing transitions between different diameters.
The document discusses the design of helical springs. It defines what springs are and their objectives, such as cushioning shocks. It describes common spring materials like music wire and different types of springs like cylindrical helical and leaf springs. The document covers stress analysis and deflection analysis of helical compression springs. It provides the basic design procedure for determining spring dimensions given inputs like load and deflection.
This document discusses different types of springs, their applications, and reasons for their use. It describes helical springs, including extension, compression, torsion, and spiral springs. It also covers leaf springs. Springs store energy and release it, absorb shocks, and maintain force between surfaces. Common applications include brakes, clutches, scales, watches, toys, and vehicle suspensions. Hooke's law states that the stretch or compression of a spring is directly proportional to the applied force.
This document summarizes key information about helical springs including their application, classification, design considerations, and equations. Helical springs are elastic devices that store energy and can be used to apply or absorb force. They are classified further into compression and tension types. The design of helical springs considers factors like torsional shear stress, direct shear stress, angular deflection, deflection, stiffness, and maximum shear stress which are defined through mathematical equations in the document.
This document discusses different types of springs, including helical springs (tension, compression, torsion, and spiral) and leaf springs. It provides details on their construction, materials used, and applications. Helical springs store energy through twisting or stretching and release it when unloaded. Leaf springs are arc-shaped lengths of steel that provide dampening and spring functions in vehicles. Springs are commonly used to apply and control forces, measure weights, store potential energy, and reduce shocks and vibrations.
The document discusses different types of springs including their materials, applications, advantages, and designs. It provides details on helical, leaf, volute, beam, and Belleville springs. Formulas are given for calculating stresses in helical compression springs based on wire diameter, spring diameter, shear modulus, and applied force. Key aspects of helical spring design like space requirements, forces, tolerances, and environmental conditions are also outlined.
The document discusses different types of mechanical springs, including helical, conical, volute, torsion, laminated/leaf, and special purpose springs. It defines key terms used in compression springs such as solid length, free length, compressed length, spring index, spring rate, and pitch. The introduction outlines common applications of springs such as cushioning shock/vibration, applying forces, controlling motion, and storing energy. Types of springs are described along with diagrams of volute and helical torsion springs. Formulas are provided for solid length, free length, spring index, and spring rate. References for further reading on the topic are listed at the end.
- The document discusses different types of bearings including journal, slider, rolling, pivot, and collar bearings. It describes how each bearing type functions and reduces friction.
- Journal bearings form a turning pair with the shaft rotating inside a stationary bearing. Lubrication is used to create a thin lubricant layer and reduce friction.
- Pivot and collar bearings are used to support axial thrust on rotating shafts. Pivots can have flat, conical, or truncated surfaces, while collars typically use a flat surface. The document analyzes friction in flat pivot bearings assuming uniform pressure and wear distributions.
This is a power point presentation on the design of Helical springs subjected to Static and Fluctuating load. It is part of Design of Machine elements subject.
The document discusses the design and components of various types of clutches, including disc/plate clutches, multiple disc clutches, cone clutches, and centrifugal clutches. It provides notations and parameters for the design of each type, including the torque transmitted, coefficients of friction, radii of friction surfaces, pressure between surfaces, mass and speed parameters for centrifugal clutches. Key factors in clutch design, such as heat dissipation and wear resistance of friction surfaces, are also examined.
spring, types, working and advantages and disadvantages.sannanshafiq
Springs are elastic bodies that distort under load and recover their original shape when unloaded. The major types of springs are helical, conical, torsion, laminated/leaf, and disc springs. Springs work based on Hooke's law, where the force is directly proportional to displacement from the original position. Springs have advantages of being easy to manufacture, available in a wide range, and reliable with predictable performance. However, springs can buckle if deflection exceeds a critical value, and damaged springs are difficult to replace or repair.
Design of lever (machine design & industrial drafting )Digvijaysinh Gohil
This document provides information on the design of levers, including rocker arms, bell crank levers, and safety valve levers. It discusses the key lever components like the fulcrum, effort arm, and load arm. It describes how to calculate mechanical advantage, leverage, and determine the necessary effort. The procedures for designing the fulcrum pin, boss diameter, and lever cross-section are also outlined. Design examples are provided for a rocker arm, bell crank lever, and safety valve lever. The document contains the essential steps, formulas, and considerations for properly sizing and designing lever mechanisms.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
This document discusses different types of beams and beam loadings. It defines beams as members that support loads perpendicular to their longitudinal axis. It describes simply supported beams, cantilever beams, overhanging beams, propped cantilevers, continuous beams, and beams with one end hinged and the other on rollers. The document also discusses concentrated loads, uniformly distributed loads, uniformly varying loads, general loadings, and external moments on beams. It provides examples of how to represent these loads for structural analysis.
Review of Compression Helical Spring for Two Wheeler Suspension SystemsIJSRD
This document reviews helical compression springs used in two-wheeler suspension systems. It discusses the stress distribution and characteristics of helical coil springs. Parameters that influence spring quality are examined, including weight reduction. Finite element modeling is shown to improve spring analysis. The review covers spring stability, fatigue loading, strain energy, relaxation, and prior literature on maximum tensile stresses, crack opening, and deformation modeling. It concludes that design parameters, materials, geometry, defects, and shot peening affect spring fatigue life, while temperature reduces modulus and yield strength. High stress springs should be designed based on maximum tensile stresses.
UNIT 4 Energy storing elements and Engine components.pptxCharunnath S V
This document discusses various energy storing elements and engine components. It describes springs, including helical springs, leaf springs, Belleville springs, and concentric springs. It discusses the material, design, and stresses in helical springs. It also covers flywheels, connecting rods, and crankshafts as key engine components that help store and transmit energy within an engine.
This document discusses the design of helical springs against static loading. It defines what a helical spring is and its functions of storing and releasing energy and absorbing shock. The key design considerations for helical springs are described such as required space, forces, tolerances, costs and environment. Formulas are provided for calculating stresses in the spring from torsional and direct shear forces. Common spring materials and effects of end treatment are also summarized. Buckling is discussed and the formula provided. Parameters calculated by the design module are outlined such as spring dimensions, load rating and stresses. Spring testing machines are also briefly mentioned.
1) Hollow shafts can be used where weight reduction is important since only the outer material of solid shafts is stressed to the allowable limit, wasting the inner material.
2) The general torsion equation for solid shafts also applies to hollow shafts under the same assumptions.
3) Helical springs come in closed coil and open coil varieties and are used to absorb shocks and resist sudden forces between devices. They are made of spring steel or stainless steel wire.
Spring Design, Helical Springs, compression & Extension springs, spring design procedure leaf spring, multi-leaf springs design process and analysis, Role of Spring index in spring design. Springs for Fluctuating loads.
This document discusses helical springs, leaf springs, and columns and struts. It provides details on:
1) Deflection calculations for helical springs under axial load and twisting moment using energy methods. Stress calculations for open and closed coil springs.
2) Design and load calculations for leaf springs used in vehicles. Assumptions made for semi-elliptic and quarter-elliptic leaf spring shapes.
3) Buckling behavior of columns and struts. Calculations for buckling loads using slenderness ratio and considerations for end conditions.
1) Stress concentration is the localization of high stresses due to irregularities in a component's geometry. It can be quantified using a stress concentration factor.
2) Factors that cause stress concentration include variations in material properties, concentrated loads, abrupt changes in cross-section, and discontinuities.
3) Remedies for reducing stress concentration include adding fillets, undercutting notches and shoulders, drilling additional holes, and reducing transitions between different diameters.
The document discusses the design of helical springs. It defines what springs are and their objectives, such as cushioning shocks. It describes common spring materials like music wire and different types of springs like cylindrical helical and leaf springs. The document covers stress analysis and deflection analysis of helical compression springs. It provides the basic design procedure for determining spring dimensions given inputs like load and deflection.
This document discusses different types of springs, their applications, and reasons for their use. It describes helical springs, including extension, compression, torsion, and spiral springs. It also covers leaf springs. Springs store energy and release it, absorb shocks, and maintain force between surfaces. Common applications include brakes, clutches, scales, watches, toys, and vehicle suspensions. Hooke's law states that the stretch or compression of a spring is directly proportional to the applied force.
This document summarizes key information about helical springs including their application, classification, design considerations, and equations. Helical springs are elastic devices that store energy and can be used to apply or absorb force. They are classified further into compression and tension types. The design of helical springs considers factors like torsional shear stress, direct shear stress, angular deflection, deflection, stiffness, and maximum shear stress which are defined through mathematical equations in the document.
This document discusses different types of springs, including helical springs (tension, compression, torsion, and spiral) and leaf springs. It provides details on their construction, materials used, and applications. Helical springs store energy through twisting or stretching and release it when unloaded. Leaf springs are arc-shaped lengths of steel that provide dampening and spring functions in vehicles. Springs are commonly used to apply and control forces, measure weights, store potential energy, and reduce shocks and vibrations.
The document discusses different types of springs including their materials, applications, advantages, and designs. It provides details on helical, leaf, volute, beam, and Belleville springs. Formulas are given for calculating stresses in helical compression springs based on wire diameter, spring diameter, shear modulus, and applied force. Key aspects of helical spring design like space requirements, forces, tolerances, and environmental conditions are also outlined.
The document discusses different types of mechanical springs, including helical, conical, volute, torsion, laminated/leaf, and special purpose springs. It defines key terms used in compression springs such as solid length, free length, compressed length, spring index, spring rate, and pitch. The introduction outlines common applications of springs such as cushioning shock/vibration, applying forces, controlling motion, and storing energy. Types of springs are described along with diagrams of volute and helical torsion springs. Formulas are provided for solid length, free length, spring index, and spring rate. References for further reading on the topic are listed at the end.
- The document discusses different types of bearings including journal, slider, rolling, pivot, and collar bearings. It describes how each bearing type functions and reduces friction.
- Journal bearings form a turning pair with the shaft rotating inside a stationary bearing. Lubrication is used to create a thin lubricant layer and reduce friction.
- Pivot and collar bearings are used to support axial thrust on rotating shafts. Pivots can have flat, conical, or truncated surfaces, while collars typically use a flat surface. The document analyzes friction in flat pivot bearings assuming uniform pressure and wear distributions.
This is a power point presentation on the design of Helical springs subjected to Static and Fluctuating load. It is part of Design of Machine elements subject.
The document discusses the design and components of various types of clutches, including disc/plate clutches, multiple disc clutches, cone clutches, and centrifugal clutches. It provides notations and parameters for the design of each type, including the torque transmitted, coefficients of friction, radii of friction surfaces, pressure between surfaces, mass and speed parameters for centrifugal clutches. Key factors in clutch design, such as heat dissipation and wear resistance of friction surfaces, are also examined.
spring, types, working and advantages and disadvantages.sannanshafiq
Springs are elastic bodies that distort under load and recover their original shape when unloaded. The major types of springs are helical, conical, torsion, laminated/leaf, and disc springs. Springs work based on Hooke's law, where the force is directly proportional to displacement from the original position. Springs have advantages of being easy to manufacture, available in a wide range, and reliable with predictable performance. However, springs can buckle if deflection exceeds a critical value, and damaged springs are difficult to replace or repair.
Design of lever (machine design & industrial drafting )Digvijaysinh Gohil
This document provides information on the design of levers, including rocker arms, bell crank levers, and safety valve levers. It discusses the key lever components like the fulcrum, effort arm, and load arm. It describes how to calculate mechanical advantage, leverage, and determine the necessary effort. The procedures for designing the fulcrum pin, boss diameter, and lever cross-section are also outlined. Design examples are provided for a rocker arm, bell crank lever, and safety valve lever. The document contains the essential steps, formulas, and considerations for properly sizing and designing lever mechanisms.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
This document discusses different types of beams and beam loadings. It defines beams as members that support loads perpendicular to their longitudinal axis. It describes simply supported beams, cantilever beams, overhanging beams, propped cantilevers, continuous beams, and beams with one end hinged and the other on rollers. The document also discusses concentrated loads, uniformly distributed loads, uniformly varying loads, general loadings, and external moments on beams. It provides examples of how to represent these loads for structural analysis.
Review of Compression Helical Spring for Two Wheeler Suspension SystemsIJSRD
This document reviews helical compression springs used in two-wheeler suspension systems. It discusses the stress distribution and characteristics of helical coil springs. Parameters that influence spring quality are examined, including weight reduction. Finite element modeling is shown to improve spring analysis. The review covers spring stability, fatigue loading, strain energy, relaxation, and prior literature on maximum tensile stresses, crack opening, and deformation modeling. It concludes that design parameters, materials, geometry, defects, and shot peening affect spring fatigue life, while temperature reduces modulus and yield strength. High stress springs should be designed based on maximum tensile stresses.
UNIT 4 Energy storing elements and Engine components.pptxCharunnath S V
This document discusses various energy storing elements and engine components. It describes springs, including helical springs, leaf springs, Belleville springs, and concentric springs. It discusses the material, design, and stresses in helical springs. It also covers flywheels, connecting rods, and crankshafts as key engine components that help store and transmit energy within an engine.
This document discusses the design of helical compression springs. It describes different types of springs including compression, extension, torsion, and leaf springs. It covers spring characteristics such as wire diameter, mean diameter, free length, solid length, operating length, spring rate, spring index, number of coils, pitch, end configurations, and materials. The document provides equations to calculate spring stresses, deflections, and buckling loads. It includes example problems demonstrating how to analyze an existing spring and design a new spring to meet specified force and deflection requirements.
This document provides information about springs and flywheels. It defines springs as elastic bodies that distort under load and recover their original shape when unloaded. Common types of springs discussed include helical, leaf, and Belleville springs. Terminology used in helical springs like wire diameter, coil diameter, and spring index are defined. The document also discusses flywheels, their purpose of storing energy from the power source and releasing it more uniformly. Equations for coefficient of fluctuation of speed and energy, work done per cycle, and energy stored in a flywheel are provided.
Spring is an elastic body whose function is to distort when loaded and to recover its original shape when the load is removed.
APPLICATION OF SPRINGS
To apply forces as in brakes, clutches and spring loaded valves.
To store energy as in watches, toys.
To measure forces as in spring balance and engine indicators.
To cushion, absorb or control energy due to either shock or vibration as in car.The material of the spring should have
high fatigue strength,
high ductility,
high resilience and
creep resistant.
It largely depends upon the size and service.
The strength of the wires varies with size, smaller size wires have greater strength and less ductility, due to the greater degree of cold working.
Severe service means rapid continuous loading where the ratio of minimum to maximum load (or stress) is one-half or less, as in automotive valve springs.
Average service includes the same stress range as in severe service but with only intermittent operation, as in engine governor springs and automobile suspension springs.
Light service includes springs subjected to loads that are static or very infrequently varied, as in safety valve springs.
The springs are mostly made from oil-tempered carbon steel wires containing 0.60 to 0.70 per cent carbon and 0.60 to 1.0 per cent manganese.
This document discusses different types of springs, their applications, and key terms used in compression springs. It provides information on five main types of springs: helical, conical and volute, torsion, laminated or leaf, and disc or Belleville springs. Helical springs are the most common and can be used for both compression and tension. Springs are widely used to cushion impacts, apply forces, control motion, and store energy in various mechanical applications. Key terms discussed include solid length, free length, spring index, spring rate, and pitch.
A clutch allows a driving shaft to connect to or disconnect from a driven shaft. There are two main types of clutches: positive clutches provide a direct connection, while friction clutches are more common and use friction between surfaces. Friction clutches include disc/plate clutches with one or more friction plates, cone clutches with conical friction surfaces, and centrifugal clutches where shoes move outward under centrifugal force to engage. The document then provides details on the design and operation of these different friction clutch types.
CLUTCH.pptx, type of clutch and design clutchhaymanot16
A clutch connects a driving shaft to a driven shaft allowing the driven shaft to be engaged and disengaged. There are two main types of clutches - positive clutches that provide direct contact engagement and friction clutches that engage through surface friction. Common friction clutches include disc clutches using multiple plates, cone clutches using a pair of conical surfaces, and centrifugal clutches that engage using centrifugal force from rotating weights. Friction clutches are designed considering factors like material selection, weight reduction, self-engagement ability, and heat dissipation.
The document discusses suspension systems and springs used in vehicle suspension systems. It describes the main types of suspension systems including dependent, independent, and semi-dependent. It then focuses on MacPherson strut suspension systems, why they are commonly used, and how they work. The document then discusses different types of springs used in suspensions including extension, compression, torsion, and leaf springs. It provides details on spring materials, manufacturing processes, and key spring terminology.
1. Springs are elastic bodies that store mechanical energy. They are used to exert force, provide flexibility, and absorb energy.
2. Common types of springs include helical springs, leaf springs, and disc or Belleville springs. Helical springs can be open or closed coils for compression and tension. Leaf springs use stacked plates, while disc springs use stacked conical discs.
3. Springs have many applications including brakes, clutches, watches, toys, shock absorption, and vibration control. Railway wagons, automobiles, and other machines commonly use springs.
Helical springs can be used for both compression and torsion. A helical torsion spring made of round wire is subjected to pure bending stress when a torque is applied. The bending stress depends on factors like the wire diameter, mean spring diameter, torque applied, number of turns, modulus of elasticity and spring index. Flat spiral springs store strain energy when wound, subjecting the material to pure bending. The maximum bending stress occurs at the point of maximum bending moment and can be used to calculate the number of turns required to wind the spring fully.
1) Springs are elastic elements that deflect under load and return to their original shape when unloaded. They come in various shapes and are classified by type, with helical springs being most common.
2) Helical springs are used to absorb shocks, store energy, measure forces, and control motion. The main types are compression and extension springs.
3) Springs are designed based on factors like the wire diameter, mean coil diameter, and spring index, which determines stresses and deflection. Proper design ensures springs function reliably under various loads.
1. A spring is an elastic element that deflects under load and returns to its original shape when the load is removed. Springs are commonly used to absorb shocks, measure forces, store energy, and apply or control motion.
2. The main types of springs are helical coil springs, torsion bar springs, leaf springs, volute springs, pneumatic springs, and Belleville springs. Helical coil springs can be compression or extension springs and can have standard, variable pitch, or conical coil designs.
3. The stress, deflection, and rate of springs is calculated based on factors like wire diameter, mean coil diameter, shear modulus, and spring index. Higher spring indices provide
The document provides information on different types of mechanical springs, including helical compression springs, helical extension springs, helical torsion springs, and multileaf springs. It discusses the terminology, dimensions, stress and deflection equations used in the design of helical springs. The functions and applications of springs are described. The document also covers spring materials, manufacturing processes, series and parallel connections of springs, and the relationship between ultimate tensile strength and wire diameter for spring design.
This document discusses torsion, springs, and helical springs. It defines torsion as the twisting deformation of a shaft under a torque. Springs are elastic bodies that absorb and release energy. The two main types are laminated/leaf springs and helical springs. Helical springs come in two varieties: close-coiled springs which experience pure torsion, and open-coiled springs which can undergo both compression and extension due to their larger pitch. Key spring parameters are the spring index relating coil diameter to wire diameter, and solid length measuring the distance between coils with no gaps.
Design of rope, belt and chain by Aliyi UmerAliyi Umer
The document provides information on different types of belt, rope, and chain drives used for power transmission. It discusses flat belt drives, V-belt drives, rope drives, and chain drives. For each type of drive, it describes the components, operation, advantages and disadvantages. It also provides formulas for calculating important parameters like velocity ratio, power transmitted, stresses, and length of drives. Design procedures and considerations for selecting proper dimensions are discussed. Tables with standard dimensions and specifications for various drives are also included.
Torsion (Springs)-Strength of Materials.pdfDr.S.SURESH
This document discusses different types of springs, including helical and leaf springs. Helical springs are made of coiled wire and store energy through torsion or twisting. Leaf springs are laminated and absorb shocks in vehicles. The document provides equations to calculate spring deflection, stiffness, and maximum shear/bending stress. It includes examples solving for the number of plates in a leaf spring, length of a leaf spring, and deflection under a given load.
1. Leaf springs are used in automobile suspension and consist of flat plates or leaves assembled together. Stress and deflection equations can be derived by modeling the leaves as beams.
2. To make the spring more compact, the original plate can be cut into strips and stacked together. Stress and deflection are calculated by replacing the plate width with the total width of strips.
3. Semi-elliptical leaf springs are the most common type. They consist of a master leaf and graduated leaves held together with clips. The stress and deflection equations treat the master and graduated leaves as a beam and extra full length leaves as another beam.
This document discusses compression members and buckling of steel columns. It defines compression members as members subjected to compressive stresses that tend to shorten or squeeze the member. Examples given include struts, columns, truss chords, and beams. It notes that compression members are more prone to buckling than tension members. Buckling occurs when the critical buckling load is reached due to factors like member length, cross-section, end conditions, and imperfections. The effective length factor K is introduced to account for end conditions and sidesway in calculating the critical slenderness ratio.
6th International Conference on Machine Learning & Applications (CMLA 2024)ClaraZara1
6th International Conference on Machine Learning & Applications (CMLA 2024) will provide an excellent international forum for sharing knowledge and results in theory, methodology and applications of on Machine Learning & Applications.
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Spring
1. springs
Reference Churmi (Gupta) Page 1
Prepared by Gera abate
Buy e-books at https://gera23.itch.io/
Introduction
A spring is defined as an elastic body, whose function is to distort when loaded and to recover its original shape
when the load is removed.
The various important applications of springs are as follows :
1. To cushion, absorb or control energy due to either shock or vibration as in car springs, railway buffers, air-
craft landing gears, shock absorbers and vibration dampers.
2. To apply forces, as in brakes, clutches and spring loaded valves.
3. To control motion by maintaining contact between two elements as in cams and followers.
4. To measure forces, as in spring balances and engine indicators.
5. To store energy, as in watches, toys, etc.
Types of Springs
1. according to their shape;-
a. Helical springs the helical springs are said to be
i. closely coiled when the spring wire is coiled so
close that the plane containing each turn is nearly at
right angles to the axis of the helix and the wire is
subjected to torsion. In other words, in a closely
coiled helical spring, the helix angle is very small,
it is usually less than 10°. The major stresses
produced in helical springs are shear stresses due
to twisting. The load applied is parallel to or along
the axis of the spring.
ii. In open coiled helical springs, the spring wire is coiled in such a way that there is a gap between the
two consecutive turns, as a result of which the helix angle is large
The major stresses produced in helical springs are shear stresses due to twisting
b. Conical and volute springs. Is used spring rate that
increases with the load is desired. the number of active
coils gradually decreases. The decreasing number of coils
results in an increasing spring rate. The major stresses
produced in conical and volute springs are also shear
stresses due to twisting
c. Torsion springs. These springs may be of
helical or spiral type as shown in Fig..3. The
helical type may be used only in applications
where the load tends to wind up the spring
The major stresses produced in torsion springs
are tensile and compressive due to bending
2. springs
Reference Churmi (Gupta) Page 2
d. Laminated or leaf springs. The laminated or
leaf spring (also known as flat spring or
carriage spring) consists of a number of flat
plates (known as leaves) of varying lengths held
together by means of clamps and bolts,
e. Disc or bellevile springs. These springs consist
of a number of conical discs held together
against slipping by a central bolt or tube as shown in Fig. .5
f. Special purpose springs. These springs are air or liquid springs, rubber springs, ring springs etc. The fluids
(air or liquid) can behave as a compression spring. These springs are used for special types of application
only.
Material for Helical Springs
The material of the spring should have high fatigue strength, high ductility, high resilience ( property of materials to
absorb energy, and to resist impact and shock load) and it should be creep resistant. It largely depends upon the
service for which they are used i.e. severe service, average service or light service.
Severe service means rapid continuous loading where the ratio of minimum to maximum load (or stress) is
one-half or less, as in automotive valve springs
Average service includes the same stress range as in severe service but with only intermittent operation, as
in engine governor springs and automobile suspension springs.
Light service includes springs subjected to loads that are static or very infrequently varied, as in safety
valve springs.
Terms used in Compression Springs
terms used in connection with compression springs are
1. Solid length. When the compression
spring is compressed until the coils
come in contact with each other, then
the spring is said to be solid. The solid
length of a spring is the product of
total number of coils and the diameter
of the wire
2. Free length. The free length of a compression spring is the length of the spring in the free or unloaded
condition.
3. springs
Reference Churmi (Gupta) Page 3
3. Spring index. The spring index is defined as the ratio of the mean diameter of the coil to the diameter of
the wire. Mathematically
4. Spring rate. The spring rate (or stiffness or spring constant) is defined as the load required per unit
deflection of the spring. Mathematically
5. Pitch. The pitch of the coil is defined as the axial distance between adjacent coils in uncompressed state.
Mathematically,
End Connections for Compression Helical Springs
In all springs, the end coils produce an eccentric application of the load, increasing the stress on one side of the
spring. Under certain conditions, especially where the number of coils is small, this effect must be taken into
account. It may be noted
that part of the coil which
is in contact with the seat
does not contribute to
spring action and hence
are termed as inactive
coils The turns which
impart spring action are
known as active turns. As
the load increases, the
number of inactive coils
also increases due to
seating of the end coils
and the amount of
increase varies from 0.5 to
4. springs
Reference Churmi (Gupta) Page 4
1 turn at the usual working loads
End
Connections for Tension Helical Springs
The tensile springs are provided with hooks or
loops as shown in Fig. 23.8. These loops may
be made by turning whole coil or half of the
coil. In a tension spring, large stress
concentration is produced at the loop or other
attaching device of tension spring.
The main disadvantage of tension spring is the
failure of the spring when the wire breaks. A
compression spring used for carrying a tensile
load is shown in Fig. 23.9.
Thus for a spring having loops on both ends, the
total number of active turns,
Stresses in Helical Springs of Circular Wire
Consider a helical compression spring made of circular wire and subjected to an axial load W,
5. springs
Reference Churmi (Gupta) Page 5
A little consideration will show that part of the spring, as shown in Fig. .10 (b), is in equilibrium under the action of
two forces W and the twisting moment T. We know that the twisting moment,
We know that the resultant shear stress
induced in the wire,
The positive sign is used for the inner
edge of the wire and negative sign is used
for the outer edge of the wire. Since the
stress is maximum at the inner edge of the
wire, therefore
Maximum shear stress induced in the wire,
6. springs
Reference Churmi (Gupta) Page 6
In order to consider the effects of both direct shear as well as curvature of the wire, a Wahl’s stress factor
(K) introduced by A.M. Wahl may be used. The resultant diagram of torsional shear, direct shear and
curvature shear stress is shown in Fig. .11 (d).
The values of K for a given spring index (C) may be obtained from the graph as shown in Fig. .12.
8. springs
Reference Churmi (Gupta) Page 8
Eccentric Loading of Springs
Sometimes, the load on the springs does not coincide with the axis of the spring, i.e. the spring is
subjected to an eccentric load. In such cases, not only the safe load for the spring reduces, the
stiffness of the spring is also affected. The eccentric load on the spring increases the stress on
one side of the spring and decreases on the other side. When the load is offset by a distance e
from the spring axis, then the safe load on the spring may be obtained by multiplying the axial
load by the factor
Buckling of Compression Springs
It has been found experimentally that when the free length of the spring
(LF) is more than four times the mean or pitch diameter (D), then the
spring behaves like a column and may fail by buckling at a comparatively
low load as shown in Fig. .13
9. springs
Reference Churmi (Gupta) Page 9
Note;- It may be noted that a hinged end spring is one which is supported on pivots at both ends
as in case of springs having plain ends where as a built-in end spring is one in which a squared
and ground end spring is compressed between two rigid and parallel flat plates. It order to avoid
the buckling of spring, it is either mounted on a central rod or located on a tube. When the
spring is located on a tube, the clearance between the tube walls and the spring should be kept
as small as possible
Examples