What test measures stress and strain?

What test measures stress and strain?

• A. Tensile Test
• B. Bending Test
• C. Charpy Impact Test
• D. Hardness Test

Answer: (A)

A tensile test directly reveals how a material behaves under axial loading, giving you both stress and strain data. In this test, a specimen is pulled in tension while measuring the applied force and the resulting change in length. Stress is the force divided by the original cross-sectional area, and strain is the change in length divided by the original length. By plotting stress versus strain, you get a curve that shows the elastic region, yield point, plastic deformation, necking, and fracture. This curve lets you determine key properties like Young’s modulus (slope of the elastic portion), yield strength, ultimate tensile strength, and ductility (percent elongation). Other tests—bending tests, Charpy impact tests, and hardness tests—assess different behaviors: bending examines stiffness and flexural strength under bending, Charpy tests measure energy absorbed during a high-rate impact, and hardness tests gauge resistance to indentation. But only the tensile test provides the direct relationship between axial stress and axial strain.

A tensile test directly reveals how a material behaves under axial loading, giving you both stress and strain data. In this test, a specimen is pulled in tension while measuring the applied force and the resulting change in length. Stress is the force divided by the original cross-sectional area, and strain is the change in length divided by the original length. By plotting stress versus strain, you get a curve that shows the elastic region, yield point, plastic deformation, necking, and fracture. This curve lets you determine key properties like Young’s modulus (slope of the elastic portion), yield strength, ultimate tensile strength, and ductility (percent elongation). Other tests—bending tests, Charpy impact tests, and hardness tests—assess different behaviors: bending examines stiffness and flexural strength under bending, Charpy tests measure energy absorbed during a high-rate impact, and hardness tests gauge resistance to indentation. But only the tensile test provides the direct relationship between axial stress and axial strain.