Mumbai University
Mechanical engineering
SEM III
Material Technology
module 1.3
Deformation:
Definition, elastic and plastic deformation, Mechanism of deformation and its significance in design and shaping, Critical Resolved shear stress, Deformation in single crystal and polycrystalline materials, Slip systems and deformability of FCC, BCC and HCP lattice systems.
Mumbai University
Mechanical engineering
SEM III
Material Technology
module 1.3
Deformation:
Definition, elastic and plastic deformation, Mechanism of deformation and its significance in design and shaping, Critical Resolved shear stress, Deformation in single crystal and polycrystalline materials, Slip systems and deformability of FCC, BCC and HCP lattice systems.
Mumbai University.
Mechanical Engineering
SEM III
Material Technology
MOdule 2.1
Fracture:
Definition and types of facture, Brittle fracture: Griffith’s theory of fracture, Orowan’s modification, Dislocation theory of fracture, Critical stress and crack propagation velocity for brittle fracture, Ductile fracture: Notch effect on fracture, Fracture toughness, Ductility transition, Definition and significance
Ekeeda is an online portal which creates and provides exclusive content for all branches engineering.To have more updates you can goto www.ekeeda.com..or you can contact on 8433429809...
In these slides, an important mechanical property of Materials, that is HARDNESS, is discussed along with the different procedures which are used for determination of Hardness value of a certain material.
I hope, you'll find it helpful...!
This PPT discusses Fatigue and Fracture mechanism, some history and problems. It has included on research paper. You can refer the literature review for further study of the topic.
Strength of Materials Lecture - 2
Elastic stress and strain of materials (stress-strain diagram)
Mehran University of Engineering and Technology.
Department of Mechanical Engineering.
undamentals of Crystal Structure: BCC, FCC and HCP Structures, coordination number and atomic packing factors, crystal imperfections -point line and surface imperfections. Atomic Diffusion: Phenomenon, Fick’s laws of diffusion, factors affecting diffusion.
This topic provides an understanding on the purposes of materials testing and deformities in certain materials. It also explains on the definition and principle on mechanical properties of materials, destructive and non-destructive tests.
SPRING BACK PREDICTION OF SHEET METAL IN DEEP DRAWING PROCESSIAEME Publication
Spring back is one of the most significant phenomenon that affect the accurateness of the sheet metal parts. In order to obtain fixed tolerances for the formed parts it is highly recommended to use such process parameters/tool geometry that allow a considerably diminishing of the spring back amount. A Finite Element (FE) model is developed for the 2- D numerical simulation of sheet metal deep drawing process (Parametric Analysis) by using HYPERFORM with the appropriate material properties (anisotropic material) and simplifies boundary conditions
Mumbai University.
Mechanical Engineering
SEM III
Material Technology
MOdule 2.1
Fracture:
Definition and types of facture, Brittle fracture: Griffith’s theory of fracture, Orowan’s modification, Dislocation theory of fracture, Critical stress and crack propagation velocity for brittle fracture, Ductile fracture: Notch effect on fracture, Fracture toughness, Ductility transition, Definition and significance
Ekeeda is an online portal which creates and provides exclusive content for all branches engineering.To have more updates you can goto www.ekeeda.com..or you can contact on 8433429809...
In these slides, an important mechanical property of Materials, that is HARDNESS, is discussed along with the different procedures which are used for determination of Hardness value of a certain material.
I hope, you'll find it helpful...!
This PPT discusses Fatigue and Fracture mechanism, some history and problems. It has included on research paper. You can refer the literature review for further study of the topic.
Strength of Materials Lecture - 2
Elastic stress and strain of materials (stress-strain diagram)
Mehran University of Engineering and Technology.
Department of Mechanical Engineering.
undamentals of Crystal Structure: BCC, FCC and HCP Structures, coordination number and atomic packing factors, crystal imperfections -point line and surface imperfections. Atomic Diffusion: Phenomenon, Fick’s laws of diffusion, factors affecting diffusion.
This topic provides an understanding on the purposes of materials testing and deformities in certain materials. It also explains on the definition and principle on mechanical properties of materials, destructive and non-destructive tests.
SPRING BACK PREDICTION OF SHEET METAL IN DEEP DRAWING PROCESSIAEME Publication
Spring back is one of the most significant phenomenon that affect the accurateness of the sheet metal parts. In order to obtain fixed tolerances for the formed parts it is highly recommended to use such process parameters/tool geometry that allow a considerably diminishing of the spring back amount. A Finite Element (FE) model is developed for the 2- D numerical simulation of sheet metal deep drawing process (Parametric Analysis) by using HYPERFORM with the appropriate material properties (anisotropic material) and simplifies boundary conditions
Optimization of Heavy Vehicle Suspension System Using CompositesIOSR Journals
A leaf spring is a simple form of spring, commonly used for the suspension in wheeled vehicles. Leaf
Springs are long and narrow plates attached to the frame of a trailer that rest above or below the trailer's axle.
There are mono leaf springs, or single-leaf springs, that consist of simply one plate of spring steel. These are
usually thick in the middle and taper out toward the end, and they don't typically offer too much strength and
suspension for towed vehicles. Drivers looking to tow heavier loads typically use multi leaf springs, which
consist of several leaf springs of varying length stacked on top of each other. The shorter the leaf spring, the
closer to the bottom it will be, giving it the same semielliptical shape a single leaf spring gets from being thicker
in the middle. The automobile industry has shown increased interest in the replacement of steel spring with
fiberglass composite leaf spring due to high strength to weight ratio. In this thesis a leaf spring used in a heavy
vehicle is designed. While designing leaf spring following four cases are considered: by changing the thickness,
changing no. of leaves, changing camber and changing span .Present used material for leaf spring is Mild Steel.
The objective of this thesis is to compare the load carrying capacity, stiffness and weight savings of composite
leaf spring with that of steel leaf spring. The design constraints are stresses and deflections. In this thesis, the
material is replaced with composites since they are less dense than steel and have good strength. The strength
validation is done using FEA software ANSYS by structural analysis. Modal analysis is also done to determine
the frequencies. Analysis is done by layer stacking method for composites by changing number of layers 3, 5, 11
and 23. The composites used are Aramid Fiber and Glass Fiber
The important points of composite materials are mentioned. This file includes, what is composite materials, its classifications, applications, advantages and disadvantages.
All the fundamentals of mechanics of Solids are explained, Topics covered are Simple stress and Strain, Shear force and bending moment diagram, Bending and shear stress, Torsion, Axially loaded column, Principle stresses and strains.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
2. Important notes
Make sure to submit your work BEFORE the Due date
50% minus if you submit after it.
3. Assignments
You will get your feed back
After submitting your
assignment and you should:
1- submit before the due date
2- solve all the questions
3- submit your assignment as
neat as possible
NEVER copy your assignment!!!
4. Quizzes
1- Quizzes will start at a certain time
2- You are not allowed to flip your
quiz until you hear that the quiz will
start now.
3- When you hear put your pens
down, stop answering immediately.
4- Follow the instructor’s directions
Never Cheat !!
5. Report and a presentation
Form groups of ”2”
Be on time
Stick to the time limit
8. Classification
Material can be divided into
1- Crystalline material
These materials contains one or more crystal, In each crystall atoms
show a periodic arrangement.
2- Non- crytalline material (amorphous material)
These materials does not contain a periodic arrangement of ions or
atoms
10. Deformation
It is the changes in an object's shape due to the application of a force or several
forces
11. Types of Deformation
Deformation can be classified into to groups
1- Elastic deformation
It is a reversible deformation, which means the body will return to it’s original
shape when the stress is removed
2- Plastic Deformation
It is a irreversible deformation (permanent)
12. Stress
It is the force applied per area of the body
Different forms of stresses will be discussed later
=
F
A
stress
16. Ductility
It is the ability of the material to bend or stretch without breaking
17. Brittleness
The material is said to be brittle if it fails without any plastic deformation
A- ductile material
B- moderately ductile
material
C- Brittle material
18. Hardness
It is the resistance of the material to scratch or penetration
20. Stress-strain curve
stress
strain
P
P : Proportional limit
E
E : Elasticity limit
Y2
Y : Yield point
1- upper yield point
2- Lower yield point
U
U: Ultimate tensile strength
B: Break point
B
Elastic Plastic
Y1
21. Stress-strain curve
Elasticity limit :
is the maximum stress within a material can withstand before permanent deformation.
This point is the limit of the elastic region
Yield point:
marks the beginning of plasticity.
Ultimate tensile strength:
The maximum stress that a material can withstand while being stretched or pulled before
breaking
22. Toughness
It is the energy absorbed by the material before fracture
It is the total area under the curve for the stress-strain up to fracture