Shear Modulus Calculator (Modulus of Rigidity)

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The tangential force per unit area acting on a surface.
Pa
The angular deformation, approximately equal to displacement divided by length (dx/L) for small angles.
dimensionless
Shear modulus (G)Polymer / composite
0.08

Modulus of rigidity: resistance of the material to shear deformation.

G (in Pa / psi)80,000,000
Shear stress (tau)50,000
Shear strain (gamma)0.000625
0.08 GPa
Rubber/polymer<2Light alloys2-30Cu/Ti range30-50Steel/iron50-82Very stiff82+

Shear modulus G = 0.080 GPa

  • This material is about 100% less stiff in shear than structural steel (G = 79.3 GPa).
  • A shear stress of 50,000 Pa produces an angular deformation of 6.250e-4 radians.
  • Shear modulus is determined experimentally by a torsion test on a cylindrical specimen and is valid only in the elastic (linear) range of the stress-strain curve.

Next stepUse G to design against torsional deflection, calculate shear spring rates, or select materials where rigidity under shear loads is critical.

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