This document contains information about a machine design exam, including 8 practice problems covering topics like shaft design, riveted joints, bolted joints, springs, and flexible couplings. The problems provide relevant design parameters and stress values to use in calculating required dimensions. The document also lists the code, set number, course name, date and time allotted for the exam, as well as the maximum marks possible.
Springs - DESIGN OF MACHINE ELEMENTS-IIDr. L K Bhagi
ย
Introduction to springs, Types and terminology of springs, Stress and deflection equations, Series and parallel connection, Design of helical springs, Design against fluctuating load, Concentric springs, Helical torsion springs, Spiral springs, Multi-leaf springs, Optimum design of helical spring
Springs - DESIGN OF MACHINE ELEMENTS-IIDr. L K Bhagi
ย
Introduction to springs, Types and terminology of springs, Stress and deflection equations, Series and parallel connection, Design of helical springs, Design against fluctuating load, Concentric springs, Helical torsion springs, Spiral springs, Multi-leaf springs, Optimum design of helical spring
Stress Analysis of I.C.Engine Connecting Rod by FEM and PhotoelasticityIOSR Journals
ย
Abstract: The automobile engine connecting rod is a high volume production critical component. Every vehicle
that uses an internal combustion engine requires at least one connecting rod .From the viewpoint of
functionality, connecting rods must have the highest possible rigidity at the lowest weight. The major stress
induced in the connecting rod is a combination of axial and bending stresses in operation. The axial stresses are
produced due to cylinder gas pressure (compressive only) and the inertia force arising in account of
reciprocating action (both tensile as well as compressive), where as bending stresses are caused due to the
centrifugal effects. The result of which is, the maximum stresses are developed at the fillet section of the big and
the small end.Hence, the paper deals with the stress analysis of connecting rod by Finite Element Method using
Pro/E Wildfire 4.0 and ANSYS WORKBENCH 11.0 software. The comparison and verification of the results
obtained in FEA is done experimentally by the method of Photo elasticity(Optical Method). The method of
Photoelasticity includes the casting of Photoelastic sheet using Resin AY103 and Hardner HY951, preparation
of the model from Photoelastic sheet calibration of the sheet to determine material fringe value.
Keywords - Big End fillet section ,Connecting Rod, Compressive Stresses , Failure of Connecting Rod, FEA,
Photoelasticity, Small End fillet section, Tensile Stresses.
Design and Analysis of Connecting Rod of Diesel Engineijtsrd
ย
The main objective of this study is to review the weight optimization and cost reduction of a connecting rod in a Diesel engine. To get the idea about designing the connecting rod, various stresses to be considered while designing the connecting rod .This has entailed performing a detailed load analysis. The most important factors that are concentrated are stress distribution and deflections. In this project the connecting rod is designed with respect to all the available constraints using advanced cad software CATIA. Later the product file is converted to .stp file format standard exchange of product file and imported to ANSYS workbench to find deformation and analytic valve with respect to the model or product definitions. A. Vijay Kumar | K. Mihir | M. Mrudul | P. Pavan Kumar ""Design and Analysis of Connecting Rod of Diesel Engine"" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-3 , April 2019, URL: https://www.ijtsrd.com/papers/ijtsrd23182.pdf
Paper URL: https://www.ijtsrd.com/engineering/mechanical-engineering/23182/design-and-analysis-of-connecting-rod-of-diesel-engine/a-vijay-kumar
Stress Analysis of I.C.Engine Connecting Rod by FEM and PhotoelasticityIOSR Journals
ย
Abstract: The automobile engine connecting rod is a high volume production critical component. Every vehicle
that uses an internal combustion engine requires at least one connecting rod .From the viewpoint of
functionality, connecting rods must have the highest possible rigidity at the lowest weight. The major stress
induced in the connecting rod is a combination of axial and bending stresses in operation. The axial stresses are
produced due to cylinder gas pressure (compressive only) and the inertia force arising in account of
reciprocating action (both tensile as well as compressive), where as bending stresses are caused due to the
centrifugal effects. The result of which is, the maximum stresses are developed at the fillet section of the big and
the small end.Hence, the paper deals with the stress analysis of connecting rod by Finite Element Method using
Pro/E Wildfire 4.0 and ANSYS WORKBENCH 11.0 software. The comparison and verification of the results
obtained in FEA is done experimentally by the method of Photo elasticity(Optical Method). The method of
Photoelasticity includes the casting of Photoelastic sheet using Resin AY103 and Hardner HY951, preparation
of the model from Photoelastic sheet calibration of the sheet to determine material fringe value.
Keywords - Big End fillet section ,Connecting Rod, Compressive Stresses , Failure of Connecting Rod, FEA,
Photoelasticity, Small End fillet section, Tensile Stresses.
Design and Analysis of Connecting Rod of Diesel Engineijtsrd
ย
The main objective of this study is to review the weight optimization and cost reduction of a connecting rod in a Diesel engine. To get the idea about designing the connecting rod, various stresses to be considered while designing the connecting rod .This has entailed performing a detailed load analysis. The most important factors that are concentrated are stress distribution and deflections. In this project the connecting rod is designed with respect to all the available constraints using advanced cad software CATIA. Later the product file is converted to .stp file format standard exchange of product file and imported to ANSYS workbench to find deformation and analytic valve with respect to the model or product definitions. A. Vijay Kumar | K. Mihir | M. Mrudul | P. Pavan Kumar ""Design and Analysis of Connecting Rod of Diesel Engine"" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-3 , April 2019, URL: https://www.ijtsrd.com/papers/ijtsrd23182.pdf
Paper URL: https://www.ijtsrd.com/engineering/mechanical-engineering/23182/design-and-analysis-of-connecting-rod-of-diesel-engine/a-vijay-kumar
This document contains: Mechanics of Materials: Question bank from old VTU Question papers ; Pprepared by Hareesha N G, DSCE, Bengaluru. These questions are picked from last 06 years of old VTU question papers.
Remote sensing and monitoring are changing the mining industry for the better. These are providing innovative solutions to long-standing challenges. Those related to exploration, extraction, and overall environmental management by mining technology companies Odisha. These technologies make use of satellite imaging, aerial photography and sensors to collect data that might be inaccessible or from hazardous locations. With the use of this technology, mining operations are becoming increasingly efficient. Let us gain more insight into the key aspects associated with remote sensing and monitoring when it comes to mining.
3.0 Project 2_ Developing My Brand Identity Kit.pptxtanyjahb
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A personal brand exploration presentation summarizes an individual's unique qualities and goals, covering strengths, values, passions, and target audience. It helps individuals understand what makes them stand out, their desired image, and how they aim to achieve it.
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Unveiling the Secrets How Does Generative AI Work.pdfSam H
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At its core, generative artificial intelligence relies on the concept of generative models, which serve as engines that churn out entirely new data resembling their training data. It is like a sculptor who has studied so many forms found in nature and then uses this knowledge to create sculptures from his imagination that have never been seen before anywhere else. If taken to cyberspace, gans work almost the same way.
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Grote partijen zijn al een tijdje onderweg met retail media. Ondertussen worden in dit domein ook de kansen zichtbaar voor andere spelers in de markt. Maar met die kansen ontstaan ook vragen: Zelf retail media worden of erop adverteren? In welke fase van de funnel past het en hoe integreer je het in een mediaplan? Wat is nu precies het verschil met marketplaces en Programmatic ads? In dit half uur beslechten we de dilemma's en krijg je antwoorden op wanneer het voor jou tijd is om de volgende stap te zetten.
Putting the SPARK into Virtual Training.pptxCynthia Clay
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This 60-minute webinar, sponsored by Adobe, was delivered for the Training Mag Network. It explored the five elements of SPARK: Storytelling, Purpose, Action, Relationships, and Kudos. Knowing how to tell a well-structured story is key to building long-term memory. Stating a clear purpose that doesn't take away from the discovery learning process is critical. Ensuring that people move from theory to practical application is imperative. Creating strong social learning is the key to commitment and engagement. Validating and affirming participants' comments is the way to create a positive learning environment.
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HR recruiter services offer top talents to companies according to their specific needs. They handle all recruitment tasks from job posting to onboarding and help companies concentrate on their business growth. With their expertise and years of experience, they streamline the hiring process and save time and resources for the company.
RMD24 | Debunking the non-endemic revenue myth Marvin Vacquier Droop | First ...BBPMedia1
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Sustainability has become an increasingly critical topic as the world recognizes the need to protect our planet and its resources for future generations. Sustainability means meeting our current needs without compromising the ability of future generations to meet theirs. It involves long-term planning and consideration of the consequences of our actions. The goal is to create strategies that ensure the long-term viability of People, Planet, and Profit.
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To download the complete presentation, visit: https://www.oeconsulting.com.sg/training-presentations
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D E S I G N O F M A C H I N E M E M B E R S I J N T U M O D E L P A P E R{Www
1. www.studentyogi.com www.studentyogi.com
Code No: R05310305
Set No. 1
III B.Tech I Semester Regular Examinations, November 2007
DESIGN OF MACHINE MEMBERS-I
( Common to Mechanical Engineering and Production Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
1. A copper bar 50 mm in diameter is placed with a steel tube 75 mm external diameter
and 50 mm internal diameter of exactly the same length. The two pieces are rigidly
xed together by two pins 18 mm in diameter, one at each end passing through the
bar and tube. Calculate the stress induced in the copper bar, steel tube and pins
if the temperature of the combination is raised by 50%. Take
s = 210 / 2; c = 105 / 2 s = 11 5 ร 10-6 o and c = 17 ร 10-6 o .
[16]
2. (a) Discuss the e ects of the following factors on endurance limit.
i. Load factor
ii. Surface nish factor
iii. size factor.
(b) A circular bar of 500 m.m length is supported freely at it two ends. It is acted
upon by a central concentrated cyclic load having a minimum value of 20 kN
and a maximum value of 50 kN. Determine the diameter of the bar by taking
a factor of safty of 1.5, size e ect of 0.85, surface nish factor of 0.9. The
material properties of bar are given by: ultimate strength of 650 Mpa, yield
strength of 500 Mpa and endurance strength of 350 Mpa. [6+10]
3. (a) What are the advantages and disadvantages of welded joints over riveted joints.
(b) A plate of 100mm wide and 10mm thick is to be welded with another plate
by means of a transverse welds at the ends. If the plates are sub jected to a
load of 70 kN, nd the size of the weld for static as well as fatigue load. The
permissible tensile stress should not exceed 70 MPa. [6+10]
4. (a) Derive an expression for the maximum load in a bolt when a bracket with
circular base is bolted to a wall by means of four bolts.
(b) Explain the method of determining the size of the bolt when the bracket carries
an eccentric load perpendicular to the axis of the bolt. [8+8]
5. (a) What is the di erence between a cotter and key? Why a single taper is provide
in cotter and not on both sides? Discuss the advantages and limitations of
cotter joint.
(b) Design a cotter joint with two gibs to transmit an axial force of 130 kN. The
permissible stresses are 165 MPa in tension; 100 M Pa in shear and 180 MPa
in crushing. [8+8]
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Code No: R05310305
Set No. 1
6. (a) What is the e ect of keyway on:
i. strength of shaft,
ii. Torsional rigidity of Shaft.
(b) Determine the inside and outside diameters of a hollow shaft, which will re-
place a solid shaft of diameter 50mm. Both the shafts are made of the same
material. The hollow shaft should be equally strong in torsion, yet the weight
should be half of the solid shaft. [6+10]
7. Design a bushed -pin type exible couplings to transmit 25kW at 960rpm.
Use the following stress values:
Shear stress =50MPa(shaft and key)
30MPa(pin)
Crushing stress =90MPa (key)
Bearing pressure=0.45N/mm2(rubber bush). [16]
8. (a) Write short notes on leaf springs
(b) A lift system is provided with cushion springs at the bottom of lift. The lift is
free to fall. Springs are set in parallel. Specify the required number of springs
if the lift has free fall of 1.5m from rest.
Weight of lift = 30kN
Allowable de ection per spring = 370 mm
Number of active turns =15
Spring mean coil diameter =30 mm
Spring wire diameter = 30mm
Modulus of rigidity for spring =80Gpa.
[6+10]
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Code No: R05310305
Set No. 2
III B.Tech I Semester Regular Examinations, November 2007
DESIGN OF MACHINE MEMBERS-I
( Common to Mechanical Engineering and Production Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
1. A load on a bolt consists of an axial pull of 10 k N together with a transver shear
force of 5 kN. Find the diameter of bolt required according to
(a) Maximum principal stress theory
(b) Maximum shear stress theory
(c) Max-principal strain theory
(d) Maximum strain energy theory.
Take permissible tensile stress at elastic limit=100 Mpa and Poissonโs ratio=0.3.
[16]
2. (a) Explain the Soderberg method for combination of stresses.
(b) A steel rod is subjected to a reversed axial load of 180 kN. Find the diameter
of the ro d for a factor of safty of 2. Neglect column action. The material
has an ultimate tensile strength of 1070 Mpa and yield strength of 910 Mpa.
The endurance limit is reversed bending may be assumed to be one half of the
ultimate tensile strength. The correction factors are as follows.
Load factor =0.7; surface nish factor=0.8
Size factor =0.85; stress concentration factor = 1. [6+10]
3. (a) Classify the rivet heads according to Indian Standard Speci cation.
(b) A double riveted lap joint is made between 15mm thick plates. The rivet
diameter and pitch are 25mm and 75mm respectively. If the ultimate stresses
are 400 MPa in tension and 320 MPa in shear and 640 MPa in crushing, nd
the minimum force per inch, which will rupture the joint. If the above joint
is sub jected to a load such that the factor of safety is 4, nd out the actual
stresses developed in the plates and the rivets. [6+10]
4. A bracket is bolted to a column by 6 bolts of equal size as shown in gure 4. It
carries a load of 50 KN at a distance of 150 mm from the center of column. If the
maximum stress in the bolts is to be limited to 150 MPa determine the diameter
of bolt. [16]
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Code No: R05310305
Set No. 2
Figure 4
5. (a) What is the di erence between a knuckle and a cotter joint? Where is the use
of knuckle joint is best suited, give some examples of its use.
(b) Two mild steel rods of 36mm diameter are to be connected by means of a
cotter joint. The ends of the rod to be suitably enlarged by forging. The
thickness of the cotter is 12mm. Calculate the dimensions of the joint, if the
permissible stresses are 60MPa in tension, 45MPa in shear, and 90MPa in
compression. [6+10]
6. In axial ow rotary compressor, the shaft is sub jected to a maximum twisting
moment of 1500N-m and a maximum bending moment of 3000N-m. Neglecting
the axial load on the shaft, determine the diameter of the shaft, if the allowable
shear stress is 50N/mm2. Assume b = 1.5 and t = 1.2. If the shaft is to be a
hollow one with i o=4, what will be the material saving in the hollow shaft. It is
sub jected to the same loading and of the same material as the solid shaft. Compare
the torsional sti ness of the two shafts. [16]
7. Design a bushed-pin type exible coupling for connecting a motor shaft to a pump
shaft, with the following service conditions:
Power to be transmitted=40kW
Speed of the motor shaft=1000rpm
Diameter of motor and pump shafts=45mm
Bearing pressure on the rubber bush=0.7N/mm2
Allowable stress in the pins=60MPa. [16]
8. A helical spring is to support a load of 1000N . The spring is guided by a ro d
of 50mm diameter. The spring undergoes a de ection of 40 mm under the load.
Determine the diameter of the wire and the number of turns required, Use C-60
steel with a factor of safety 2. [16]
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Code No: R05310305
Set No. 3
III B.Tech I Semester Regular Examinations, November 2007
DESIGN OF MACHINE MEMBERS-I
( Common to Mechanical Engineering and Production Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
1. (a) Classify the various types Machine Design.
(b) What is the procedure adopted in the design of Machine elements. [6+10]
2. A cold drawn steel rod of circular cross-section is subjected to a variable bending
moment of 565 N-m to 1130 N-m as the axial load varies from 4500 N to 13500N.
The maximum bending moment occurs at the same instant that the axial load
is maximum. Determine the required diameter of the rod for a factor of safty 2.
Neglect any stress concentration and column e ect. Assuming ultimate strength =
550 Mpa, yield strength =470Mpa, size factor=0.85, surface nish factor = 0.89.
Correlation factors = 0.1 for bending and 0.7 for axial load. The endurance limit
is reversed bending may be taken as one half the ultimate strength. [16]
3. A low carbon steel plate of 0.7m width welded to a structure of similar material
by means of two parallel llet welds of 0.112 m length (each) is subjected to an
eccentric loa of 4000N, the line of action of which has a distance of 1.5m from the
center of gravity of the weld group. Design the required thickness of the plate when
the allowable stress of the weld metal is 60 Mpa and that of the plate is 40 Mpa.
[16]
4. (a) De ne the following terms with necessary sketch.
i. Major diameter
ii. Minor diameter
iii. Pitch
iv. Lead.
(b) Derive an expression for the maxim load in a bolt. When a bracket with a
circular base is bolted to a wall by means of four bolts. [8+8]
5. (a) Describe the purpose of gib in cotter joint? What are the applications of cotter
joints?
(b) Design a knuckle joint to transmit 140 kN, with permissible stresses in tension;
shear and compression are 75 M Pa; 60 M Pa and 150 M Pa respectively.
[6+10]
6. Design a line shaft transmitting power to two machine tools. The power received
by the shaft is 30kW at 300 rpm. The power absorbed by pulley P1 is 12 kW
and the remaining power is absorbed by pulley P2. The diameter of pulley P1 is
300mm and its mass is 40Kg. the diameter and mass of pulley P2 are 600mm and
6. www.studentyogi.com www.studentyogi.com
Code No: R05310305
Set No. 3
75Kg respectively. Assume the belt tension ratio of 2 for both pulleys and the
shaft material as 30C8 steel with Km = 2 and Kt = 1.5. Draw the B.M and torque
diagramโs. Assuming maximum shear stress theory. [16]
7. (a) The bolt in the ange coupling should be made weaker than the other com-
ponents of coupling, Why?
(b) In a ange shaft coupling having 37.5mm bore it is desired that torsional
stress in the shaft will not exceed 25 N/mm2. The outside diameter of the
coupling limited by space is 200mm. There are three 15mm bolts on a bolt
circle diameter of 140mm. The radial ange thickness is 18mm. Determine
the following:
i. The power that may be transmitted at 600 rev/min.
ii. The shearing stress in the bolts.
iii. The bearing pressure on the bolts. [4+12]
8. A semi elliptical laminted spring is to carry of load of 5000N and consists 8 leaves 46
mm wide, two of the leaves being of full length. The spring is to be made 1000mm
between the eyes and is held at the center by a 60mm wide band. Assume that the
spring is initially stressed so as to induce an equal stress of 500N/mm2 when fully
loaded. Design the spring
(a) Thickness of leaves
(b) Eye diameter
(c) Length of leaves
(d) Maximum de ection and camber.
Assume E = 2.1ร105 N/mm2. [4ร4=16]
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Code No: R05310305
Set No. 4
III B.Tech I Semester Regular Examinations, November 2007
DESIGN OF MACHINE MEMBERS-I
( Common to Mechanical Engineering and Production Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
1. (a) Write short notes on free cutting steel and stainless steel.
(b) State the alloying elements added to steel and the e ects they produce in steel.
[8+8]
2. A hot rolled steel shaft is sub jected to a torsional moment that varies from 330N-
m clockwise to 110 N-m counter clock wise and an applied bending moment at a
critical section varies from 440 N-m to -220 N-m. The shaft is of uniform cross-
section and no key is present at the critical section. Determine the required shaft
diameter. The material has an ultimate strength of 550 M 2 and a yield
strength of 410 2. Take the endurance limit as half the ultimate strength,
factor of safty of 2, size factor of 0.85 and surface nish factor of 0.62. [16]
3. (a) What is the di erence between Caulking and fullering? Explain with the help
of neat sketches.
(b) A double riveted double cover butt joint is made in 12mm thick plates with
18mm diameter rivets. Find the e ciency of the joint for a pitch of 80mm, if
t= 115MPa; = 80MPa; and c = 160Mpa. [6+10]
4. Determine the size of the bolts and the thickness of the arm for the bracket as
shown in the gure 4, if it carries a load of 40 KN at an anlge of 600 to the vertical.
The material of the bracket and the bolt is same for which the safe stresses can be
assumed as 70,50 and 105 MPa in tension, shear and compression respectively. [16]
8. www.studentyogi.com www.studentyogi.com
Code No: R05310305
Set No. 4
5. (a) What is the di erence between a cotter and key? Why a single taper is provide
in cotter and not on both sides? Discuss the advantages and limitations of
cotter joint.
(b) Design a cotter joint with two gibs to transmit an axial force of 130 kN. The
permissible stresses are 165 MPa in tension; 100 M Pa in shear and 180 MPa
in crushing. [8+8]
6. Design a line shaft transmitting power to two machine tools. The power received
by the shaft is 30kW at 300 rpm. The power absorbed by pulley P1 is 12 kW
and the remaining power is absorbed by pulley P2. The diameter of pulley P1 is
300mm and its mass is 40Kg. the diameter and mass of pulley P2 are 600mm and
75Kg respectively. Assume the belt tension ratio of 2 for both pulleys and the
shaft material as 30C8 steel with Km = 2 and Kt = 1.5. Draw the B.M and torque
diagramโs. Assuming maximum shear stress theory. [16]
7. Design a cast iron protective type ange coupling to connect two shafts in order to
transmit 7.5kW at 720rpm. The following permissible stresses may be used:
Permissible shear stress for shaft, bolt and key material=33MPa
Permissible crushing stress for shaft, bolt and key material=60MPa
Permissible shear stress for the cast iron=15MPa. [16]
8. (a) List out the functions of springs.
(b) A spring for spring balance is to elongate 100mm, when subjected to a load of
200N. Assume that the mean diameter of the coil is to be 6 times the diameter
of the wire and the maximum stress to be induced is limited to 400N/mm2.
Determine the diameter for the wire, for the coil and the number of coils
required and length of spring. Modulus of rigidity G= 0.8 ร105 N/mm2.
[4+12]