Shear modulus, also known as modulus of rigidity, is a measure of a material's ability to withstand shear deformation under applied stress. It quantifies the relationship between shear stress and shear strain, indicating how much a material will deform when subjected to forces that cause it to twist or shear. This property is crucial for understanding how materials behave in various loading scenarios, especially in torsion and when analyzing both circular and non-circular members.
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