what is material stiffness
Rubber, a material with an extremely low Young's modulus. Young's modulus, which is also known as the elastic modulus, is a mechanical property of linear elastic solid materials. It defines the relationship between stress (force per unit area) and strain (proportional deformation) in a material.Young's modulus is named after the 19th-century British scientist Thomas Young. material whose Young's modulus is very high can be approximated as rigid. A stiff material needs more force to deform compared to a soft material. Therefore, the Young's modulus is a measure of the stiffness of a solid material.