Question

Modulus of elasticity for a perfectly elastic body is

• A. Zero
• B. Infinity
• C. 1
• D. Can have any value

Answer 1

Answer: (D)

Can have any value

For a perfect elastic body the stress strain graph is always linear i.e stress is always proportional to the strain through a constant i.e., the young's modulus of elasticity which is proportional to the slope of the linear property of the stress strain graph. if a body is ideally plastic it means to have infinite linear line from the center of the stress strain graph. A linear line like this could have any slope=tan θ.this linear line could have any angle meaning any slope can values between 1 and 0 implying that youngs modulus could be any value.