| Modulus of shear G | ||||||||||||||||
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| The maximum shear stress of ductile materials (steels) at first yield is usually taken as τ = 0.58·Rp0.2, according to the von Mises distortion-energy criterion. For brittle materials, τ = 0.5·Rp0.2 (Tresca maximum-shear-stress criterion). | ||||||||||||||||
| G = E / (2(1+ν)), where ν is the Poisson ratio. τ = G·γ, where τ is the shear stress and γ the shear (angular) strain — in analogy with Hooke's law, σ = E·ε. |
Shear modulus of common materials
Modulus of shear (rigidity) G for seven common materials, and the shear yield strength relative to the tensile yield strength for ductile versus brittle materials.
By Anton van BeekRead in Dutch
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