Question

The strain energy stored in a spring when it is subjected to maximum load without suffering permanent distortion is known as

• A. impact energy
• B. proof resilience
• C. proof stress
• D. modulus of resilience

Hint:

Proof resilience deals with total energy, while modulus of resilience deals with energy per unit volume.

Answer 1

The Correct Option is B

Step 1: Understanding strain energy.
Strain energy is the energy stored in a body due to deformation caused by an applied load.
Step 2: Defining proof resilience.
Proof resilience is defined as the maximum strain energy that a body can store without undergoing permanent deformation, i.e., within the elastic limit.
Step 3: Eliminating incorrect options.
Impact energy refers to energy due to sudden loading.
Proof stress is the stress corresponding to a specified permanent strain.
Modulus of resilience is the proof resilience per unit volume.
Step 4: Conclusion.
Therefore, the strain energy stored without permanent distortion is called proof resilience.