Modulus of rigidity and poisson's ratio

Simple explanation about the concept of poisson's ratio and modulus of rigidity Up to the elastic limit only, stress – strain ratio would be proportional and the ratio between the shear stress and shear strain is known as shear modulus of elasticity or modulus of rigidity. Simply The value of shear modulus determines the value of rigidness of the material. As an example steel has modulus of rigidity 75 GPa and aluminum has 28GPa. Aluminum can distort easily than the steel in shear stress. In the most of times the poisson’s ratio exists from 0 to 0.5 lateral strain and linear strain Select the correct material for correct application with the help of shear modulus. Thank you.