Question

Area under the stress-strain curve when load is gradually applied in tension represents the

• A. Strain energy
• B. Strain energy density
• C. Strain energy per unit weight
• D. Strain energy per unit area

Answer 1

Answer:

B. Strain energy density

The area under the stress-strain curve during gradual tension loading represents the strain energy density (u). Strain energy (U) is equal to u times the volume of the member (V) or the area under the load-deformation curve. For gradual loading, the stress is P/A and for sudden loading, it is 2P/A.