Question

Which of the following facts are true for resilience?

(a) Ability of material to absorb energy when deformed elastically

(b) Ability to retain deformation under the application of load or after removal of load

(c) Ability of material to absorb energy when deformed plastically

(d) None of the mentioned

This question appeared in my college exam.

Question is from the Bearings concept in section Rolling Contact Bearings, Spur Gears and Helical Gears of Machine Design

Answer 1

The optimal answer is (a) Ability of material to absorb energy when deformed elastically

To put it plainly: Toughness is ability to store energy till proportional limit during deformation and to release this energy when unloaded.