compressive stress:- if insted of pulling an our material , we push comprees our cylinder we are introducing compressive stress.
Tensile Stress:-it defined as the force divided by the initial surface area. this pulling stress is called tensile stress.
shear stress:-if instead of applying a force perpendicular to the surface, we apply parallel but opposite forces on the two surfaces we are applying a shear stress.
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Modulus of rigidity:- it is the ratio of shear stress to shear strain.
G=shear/ stress
Shear Modulus:- it is defined as the ratio of shear stress to the displacement per unit sample length shear strain.
longitudinal shear- a force parallel to the beam axis
Elastic modulus:- it is the ratio of stress below the proportional limit, to the corresponding strain. it is the measure of rigidity and stiffness of material
Hooks Law:- it states that the force needed to extend or compress a spring by some distance is proportional to that distance.
