Mechanical Engineering - Engineering Materials - Discussion

Resilience: The ability of a material to absorb energy under elastic deformation and to recover this energy upon removal of load is termed as resilience. Resilience is indicated by the area under the stress strain curve till the point of elastic limit.

Creep: It is a deformation of a material due to the constant load for a long period of time. It is time and temperature dependent property of material.

Fatigue: When a body is subjected to repeated and fluctuating load it tends to develop a characteristic behavior under which failure occurs which is referred to as fatigue.

Toughness: The ability of a material to absorb energy in plastic deformation till the point of fracture is known as toughness. Toughness is indicated by the total area under the stress strain curve up to the fracture point. Eg. Copper has higher toughness than Cast iron.

Resilience is the ability of a material to absorb energy when it is deformed elastically, and release that energy upon unloading. The modulus of resilience is defined as the maximum energy that can be absorbed per unit volume without creating a permanent distortion.

Resilience is the property of a material to absorb energy in the elastic range but energy for the plastic range is called toughness. So answer is toughness.