Resilience's the property of a material to absorb energy when it's deformed elastically and then, upon unloading to have this energy recovered. In other words, it's the maximum energy per unit volume that can be elastically stored. It's represented by the area under the curve in the elastic region in the Stress-Strain diagram. Modulus of Resilience, U_r, can be calculated using the following formula: U_r=frac), where sigma 's yield stress, E's Young's modulus, and epsilon 's strain. An example… (More on Resilience)