modulus of elasticity in shear

(mechanics) A measure of a material's resistance to shearing stress, equal to the shearing stress divided by the resultant angle of deformation expressed in radians. Also known as coefficient of rigidity; modulus of rigidity; rigidity modulus; shear modulus.

In an elastic material which has been subjected to stress, the ratio of the shearing stress to the shearing strain.

The ratio of mechanical stress to strain in an elastic material when that material is subjected to shear forces; it is the modulus of elasticity of a body under a shearing strain: modulus of rigidity = tangential force per unit area/angular deformation.