shear modulus

physics
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Also known as: rigidity modulus
Related Topics:
elastic modulus

shear modulus, numerical constant that describes the elastic properties of a solid under the application of transverse internal forces such as arise, for example, in torsion, as in twisting a metal pipe about its lengthwise axis. Within such a material any small cubic volume is slightly distorted in such a way that two of its faces slide parallel to each other a small distance and two other faces change from squares to diamond shapes. The shear modulus is a measure of the ability of a material to resist transverse deformations and is a valid index of elastic behaviour only for ...(100 of 362 words)