Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Skip to content. Stress is defined as the resisting force per unit area. Strain is defined as the deformation per unit area. When forces act to lengthen the material, the stress is referred to as tensile stress. When the forces try to compress a material, the stress is referred to as compressive stress.
Strain measures the amount of relative deformation caused by a force acting on an object. For simplicity here, we will only consider the normal strain , created by normal stress. Suppose the original length of the object is and due to stress, the length changes to. The change in length is. Strain is the change in the shape of an object when stress is applied. Therefore, we can define it as the amount of deformation that is experienced by an object according to the direction of force applied, divided by the initial dimensions of the body.
The relationship between these terms can be given as follows:. The strain of an object is a dimensionless property a length is divided by another length. We can give it a relative change in shape. There are two types of strain: tensile strain and compressive strain. The tensile strain occurs due to tensile stress, while compressive strain occurs due to compressive stress. Mathematically it is expressed as:. The strain is a measure of the deformation of a solid when stress is applied to it.
In the case of deformation in one-dimensional strain is defined as the fractional change in length. Since strain is the ratio of lengths, it is dimensionless, and therefore, has no units. If the strain is produced as a result of compressive stress, it is called compressive strain.
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