Question

Long answer type question.

Define stress and strain. What are their different types?

Answer 1

• Stress:

1. The internal restoring force per unit area of a body is called stress.
   `"Stress" = "deforming force"/"area" = |vec"F"|/"A"`
   where `vec"F"` is internal restoring force or external applied deforming force.
2.  Types of stress:
   i. Longitudinal stress,
   ii. Volume stress,
   iii. Shearing stress

• Strain:

1. Strain is defined as the ratio of change in dimensions of the body to its original dimensions.
   `"Strain" = "change in dimensions"/"original dimensions"`
2. Types of strain:
   i. Longitudinal strain,
   ii. Volume strain,
   iii. Shearing strain.