This slide is about Elasticity of a material.This term uses in Physics and also in textile Elasticity physics Hook's law Stress-strain curve

1. Welcome to My
Presentation

2. My Topic is
Elasticity
faisal, GUB

3. What is Elasticity ??
• The ability of a deformed material body
to return its original shape and size when
the forces causing the deformation are
removed is called elasticity
Rubber Band
faisal, GUB

4. Elastic Properties of Matter
•An elastic body is one that returns
to its original shape after a
deformation.
faisal, GUB

5. Elastic Properties of Matter
•An inelastic body is one that does
not return to its original shape after
a deformation
Inelastic Ball
faisal, GUB

6. An Elastic Spring
• A spring is an example of an
elastic body that can be
deformed by stretching.
faisal, GUB

7. Stress
The internal force of restitution per unit area of deformed body
faisal, GUB

8. Strain
• It is the ratio of change in configuration to the
original configuration of the deformed body. It has
neither unit nor dimension.
• 1 ) Tensile Strain
• 2 ) Volumetric Strain
• 3 ) Shear Strain
faisal, GUB

9. Youngs Modulus
• It is the ratio of longitudinal stress to the
longitudinal strain.
• Young’s modulus = longitudinal stress / longitudinal strain
• Y = ( FL ) / ( ΔLπr2)
faisal, GUB

10. • “Within the elastic
limit the stress is
directly proportional
to the strain”.
• Stress ∝ strain
Hook’s Law
faisal, GUB

11. Poisson’s Ratio
• Within the elastic limit, the
ratio between lateral strain
and linear strain is a constant.
This constant is called as
poisson’s ratio. It is
represented by 𝝈.
• 𝝈 = lateral strain / linear strain
faisal, GUB

12. ANY QUESTIONS??
faisal, GUB

13. THANK YOU
EVERYBODY
faisal, GUB