Question

Define strain and explain the types of strain.

Answer 1

The ratio of the change in configuration of the body to the original configuration is called strain.

There are 3 type if Strain

Longitudinal Strain:
The change of length per unit original length when the body is deformed by externals force.

Volumetric Strain:
The change in volume per unit original volume,when the body is deformed by externals force.

Shear Strain
If the deforming forces produces a change in the shape of the body then this type of strain is called shear strain.

Answer 2

Hii dear,

◆ Strain-
Strain is the change produced per unit dimension.
Strain = change in dimension / original dimension

◆ Types of strain -
1. Longitudinal strain-
It's the strain when deformation force is acting along length of body causing change in length.

Longitudinal strain = change in length / original length

2. Shearing strain-
It's the strain when deformation force is acting tangentially causing change in shape of the body.

Shearing strain = relative displacement / distance between 2 layers

3. Bulk strain-
It's the strain when deformation force is causing change in volume.

Bulk strain = change in volume / original volume.

Hope this is helpful...