The
modulus of elasticity (also known as the
elastic modulus, the
tensile modulus, or
Young's modulus) is a number that measures an object or substance's resistance to being deformed elastically (i.e., non-permanently) when a
force is applied to it. The elastic modulus of an object is defined as the
slope of its
stress–strain curve in the elastic deformation region: A stiffer material will have a higher elastic modulus. An elastic modulus has the form