Question

The loss of stress with time at constant strain in steel is called

• A. relaxation
• B. creep
• C. shrinkage
• D. ductility

Hint:

- Relaxation is important in prestressed concrete to prevent excessive loss of tension in tendons.

Answer 1

The Correct Option is A

Step 1: Definition of relaxation. - Relaxation occurs when stress reduces in a material even when strain remains constant. - This is significant in prestressed concrete and high-strength steel. Step 2: Difference between relaxation and creep. - Relaxation happens under constant strain. - Creep happens under constant stress. Thus, the correct answer is (A) relaxation.