Which term describes the change in dimensions due to applied stress?

Which term describes the change in dimensions due to applied stress?

• A. Stress
• B. Strain
• C. Elasticity
• D. Ductility

Answer: (B)

Strain is the change in a material’s dimensions that results from applied stress. When you push or pull on something, it may stretch or compress, and strain measures that deformation relative to the original size (ε = ΔL / L0). It’s different from stress, which is the force per area causing the deformation. In the elastic portion of loading, stress and strain are proportional (σ = Eε), with E being Young’s modulus. Strain can be axial (length change) or shear (change in angle). Ductility and elasticity describe how a material behaves under loading, not the deformation itself, so the term for the change in dimensions due to stress is strain.

Strain is the change in a material’s dimensions that results from applied stress. When you push or pull on something, it may stretch or compress, and strain measures that deformation relative to the original size (ε = ΔL / L0). It’s different from stress, which is the force per area causing the deformation. In the elastic portion of loading, stress and strain are proportional (σ = Eε), with E being Young’s modulus. Strain can be axial (length change) or shear (change in angle). Ductility and elasticity describe how a material behaves under loading, not the deformation itself, so the term for the change in dimensions due to stress is strain.