what is stress........ And what is strain
Answers
Strain is the response of a system to an applied stress. When a material is loaded with a force, it produces a stress, which then causes a material to deform. Engineering strain is defined as the amount of deformation in the direction of the applied force divided by the initial length of the material.
Hey there!
Suppose we are applying a deforming force on an object. Then there is change in its shape or size. and we define elesticity as the tendency of an object to gain its original configuration either shape or size when the deforming force is removed.
While deformation of the body, the deforming force it applied and therefore by Newton's third law we can say that an equal restoring force also acts to retain the body in its original shape. So we define two things for this. i.e Stress and Strain.
We define Stress as the restoring forces per unit area of the body.
i.e Stress = Restoring force / Area = F / A
And, We define Strain as the ratio of the change in configuration to the original configuration of the body is called strain,.
i.e Strain = Δconfiguration / orginal configuration
I hope it helps You!