ABSTRACT
When a point within a solid undergoes displacements as a result of applied stresses, angles between these points may change, leading to internal shear strains.
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It is observed that for many materials, when stretched or compressed along the length within the elastic limit, there is a contraction or expansion of the
sides as well as an extension or compression of the length. Poisson’s ratio is the ratio of the fractional change in one dimension to the fractional change of the other dimension.
