Consider the following statements regarding anelasticity: 1. For metals the anelastic component is normally small. 2. In anelasticity, deformation will continue after the stress application, and upon load release, some finite time is required for complete recovery. 3. Time-independent elastic behaviour is known as anelasticity. Which of the above statements is/are correct?
1, 2 only
Anelasticity Statements Analysis
The question asks us to identify the correct statements regarding anelasticity.
Statement 1 Analysis
Statement 1: “For metals the anelastic component is normally small.”
This statement is correct. In metals, the anelastic component of deformation is generally small compared with the instantaneous elastic deformation.
Statement 2 Analysis
Statement 2: “In anelasticity, deformation will continue after the stress application, and upon load release, some finite time is required for complete recovery.”
This statement is correct. Anelasticity is a time-dependent but recoverable deformation. The strain does not respond completely instantaneously to an applied stress, and recovery takes a finite amount of time after the stress is removed.
Statement 3 Analysis
Statement 3: “Time-independent elastic behaviour is known as anelasticity.”
This statement is incorrect. Anelasticity is specifically associated with time-dependent elastic behavior. Time-independent elastic behavior is associated with ideal elasticity, where deformation occurs essentially instantaneously with the application of stress and recovery occurs immediately when the stress is removed.
Conclusion
Therefore:
- Statement 1 — Correct ✅
- Statement 2 — Correct ✅
- Statement 3 — Incorrect ❌
