Question

Which of the following option is correct related to the application of elastic hysteresis?

• A. shock absorber
• B. eddy current absorber
• C. shock transmitter
• D. eddy current transmitter

Hint:

Hysteresis in any physical system (elastic, magnetic, etc.) always implies a history dependence and energy loss. This energy loss is often undesirable (e.g., in transformers), but it can be very useful for applications requiring damping, such as shock absorbers or vibration isolators.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Elastic hysteresis refers to the energy loss that occurs within a material during a cycle of loading and unloading. When a material is deformed and then allowed to return to its original shape, the stress-strain curve for loading is not the same as for unloading. The area enclosed by the loading-unloading loop on the stress-strain graph represents the energy dissipated as heat per unit volume.
Step 2: Detailed Explanation:
This energy dissipation is a key principle in damping vibrations and absorbing shocks. A device designed to absorb shock energy must effectively convert the kinetic energy of the shock into heat.


A shock absorber is designed to do exactly this. Materials with a large elastic hysteresis loop are used in shock absorbers because they are very effective at dissipating vibrational energy as heat, thus damping the motion.
An eddy current absorber is a type of brake that uses electromagnetic induction to create braking force and dissipate energy, not elastic hysteresis.
A shock transmitter is the opposite of an absorber; it would be designed to transmit shock with minimal energy loss.

Step 3: Final Answer:
The principle of elastic hysteresis (energy dissipation during deformation cycles) is directly applied in the design of shock absorbers.