What is stress and strain and how can we measure these quantities?

Question

Accepted Answer

Stress and strain are measures of the internal forces within a material. Stress is the force applied per unit area, while strain is the deformation of the material.

Stress is the force applied per unit area on a material, measured in units like Pascals or pounds per square inch.
Strain is the deformation or change in shape of a material due to stress, measured as a ratio of the change in length to the original length.
Stress and strain are related by the material's modulus of elasticity, which describes how the material responds to stress.
Stress can be measured using instruments like strain gauges, load cells, or pressure sensors, while strain can be measured using extensometers or by analyzing the material's deformation.
Examples of stress and strain measurements include testing the strength of a metal beam by applying a force, or measuring the elasticity of a rubber band by stretching it.

Accepted Answer

Stress is restoring internal force (against any deformation) per unit area. We can measure stress directly but we can estimate it with constitutive relation with strain. Now, strain is deformation come in body with respect to its initial phase. We can measure strain with UTM by performing compression test (for normal strain) and torsion test (for shear strain).

What is stress and strain and how can we measure these quantities?

Top HPCL Rajasthan Refinery Graduate Engineer Trainee (Get) interview questions & answers

Popular interview questions of Graduate Engineer Trainee (Get)

Top HR questions asked in HPCL Rajasthan Refinery Graduate Engineer Trainee (Get)