## Stresses and strain

Learn Stresses and strain, unit of stress,Type of stresses,Tensile stress,Compressive stress,Tensile strain,compressive strain,Shear stress and shear strain Stress: The force of resistance per unit area, offered by a body against deformation is known as stress. The external force acting on the body is called the load or force. The load is applied on the body while the stress is induced in the material of the body. A loaded member remains in equilibrium when the resistance offered by the member against the deformation and the applied load are equal. Mathematically stress is written as, \[σ = \frac{P}{ A }\] where σ = Stress (also called intensity of stress), P = External force or load, and A = Cross-sectional area. Strain When a body is subjected to some external force, there is some change of dimension of the body. The ratio of change of dimension of the body to the original dimension…