Explain the stress- strain curve. Include the
differences between the elastic and plastic region and how...
Explain the stress- strain curve. Include the
differences between the elastic and plastic region and how does
this relate to material components of the body like
bones,ligaments/tendons.
7. Draw one stress strain diagram for ductile material and
indicate the elastic, plastic region, toughness and resilience?
-Explain the mechanism of necking in details?
9. What is the unite for stress and strain?
10. What are the mechanical requirements to design a material
for high temperature applications?
a)Explain the pattern followed by a body undergoing strain,
including the elastic region, the elastic limit, plastic
deformation, and failure
b) List and explain briefly six different stresses, and give an
example of each
Q1. Describe mechanical properties of stress-strain
behavior of a polymer and a plastic (contrast with stress-strain
curves of ceramics and metals)
Q2. Describe variation of elastic/relaxation modulus
with temperature.
Q3. Describe viscoelasticity and examples of a
rubber/elastomer.
In some materials the relationship between stress and strain
during plastic deformation is given by σ
= σy+ K(ε − εy) n where
K and n are constants. What is the energy absorbed by the
specimen during plastic deformation in a tensile test if the
material yields at a strain of εy and fails at a strain
of εf?
1.1 The difference between elastic and plastic (inelastic)
behavior of materials is
a. With elastic behavior, prediction of material behavior is
possible; with plastic, it is not.
b. With plastic behavior, prediction of material behavior is
possible; with elastic, it is not.
c. The different type of design standards based on type of
material
d. There is no difference
Also, the units of deformation are in what?
Inches/inch
Psi/in
Inches2
Inches3
Compute the elastic modulus for the following metal alloys,
whose stress-strain behaviors may be observed in the "Tensile
Tests" module of Virtual Materials Science and Engineering (VMSE):
(a) titanium, (b) tempered steel, (c) aluminum, and (d) carbon
steel. How do these values compare with those presented in Table
6.1 for the same metals?