Question

define stress and strain and it's different types

Answer 1

stress is defined as the deforming force acting on a body per unit area of the body.
types of stress
1.Normal stress
2.shear stress

strain is defined as the ratio of the change in configuration to the original configuration of the body
1.longitudinal strain
2. volume strain
3.shear strain.

Answer 2

Answer :

Stress and Strain -

• The restoring force per unit area developed in the body when the body subjected to a deforming force is termed as stress.
• The magnitude of stress is equal to the magnitude of deforming force applied, but opposite in direction.
• Magnitude of stress = F/A.
• SI unit of stress is Nm^{-2} and the Dimensional Formula is [ML^{-1}T²].
• Strain is the response of stress on a body.
• It is defined as the amount of deformation divided by the initial length of the material.

Types of stress and strain -

• The restoring force when a cylinder is streched by two equal forces to it's cross sectional areas is termed as tensile stress.
• The restoring force when the cylinder is compressed under the applied forces is termed as compressive stress.
• The change in the length to the original length of the body of cylinder in tensile or compressive stress is termed as longitudinal strain. That is, ∆L/L.
• The restoring force per unit area when the tangential force is applied parallel to the cross sectional area of cylinder is termed as tangential or shearing stress.
• The relative displacement of the faces to the length of the cylinder is termed as shearing strain. That is, ∆x/L = tan ∅.
• The internal restoring force developed when the body is in a fluid is termed as hydraulic stress.
• The strain produced by the hydraulic pressure is called volume strain. That is, ∆V/V.