How do you calculate the strain in a material under stress?

To calculate the strain in a material under stress, divide the change in length by the original length.

When a material is subjected to stress, it undergoes deformation or a change in shape. The amount of deformation is measured by the strain, which is defined as the change in length per unit length. Strain is a dimensionless quantity and is usually expressed as a percentage or in parts per million (ppm).

To calculate the strain in a material, you need to know the original length of the material and the change in length caused by the stress. The strain is then calculated by dividing the change in length by the original length. For example, if a material with an original length of 10 cm is stretched to a length of 11 cm, the strain would be (11-10)/10 = 0.1 or 10%.

Strain is an important parameter in materials science and engineering, as it is used to describe the behaviour of materials under different types of stress, such as tension, compression, and shear. The relationship between stress and strain is described by the material's elastic modulus, which is a measure of the material's stiffness or resistance to deformation. The elastic modulus is different for different materials and can be used to predict the behaviour of materials under different types of stress.