Stress & Strain.

Stress: When a material in subjected to an external force, a resisting force is set up within the component. The internal resistance force per unit area acting on a material is called the stress at a point. It is a scalar quantity having unit. Types of Stresses: Normal stressShear StressBulk Stress Strain: It is the deformation produced in the material due to simple...

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Elastic Constants.

Elastic Constants: Stress produces a strain, but how much strain is produced depends on the solid itself. The solid is then characterised by anelastic modulus that relates strain to stress.> Different types of stresses and their corresponding strains within elastic limit are related which are referred to as elastic constants. The three types of elastic constants (moduli)...

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Poisson's Ratio.

Poisson's Ratio: The three stresses and strains do not operate independently. Stresses produce strains in lateral directions as the solid tries to retain its original volume. Poisson's ratio is a measure of how successful this is. When an axial force is applied along the longitudinal axis of a bar, the length of a bar will increase but at the same time its lateral dimension...

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