Modulus of Rigidity
Shear Modulus or Modulus of Rigidity is the coefficient of elasticity for a shearing or torsion force
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Modulus of Rigidity (or Shear Modulus) is the coefficient of elasticity for a shearing force. It is defined as "the ratio of shear stress to the displacement per unit sample length".
Modulus of Rigidity can be experimentally determined from the slope of a stress-strain curve created during tensile tests conducted on a sample of the material.
Definition of Modulus of Rigidity:
- The ratio of shear stress to the displacement per unit sample length
Modulus of Rigidity of some Common Materials
| Material | Shear Modulus | |
| (106 psi) | (GPa) | |
| Aluminum | 3.9 | 27 |
| Aluminum, 6061-T6 | 3.8 | 24 |
| Aluminum, 2024-T4 | 4.0 | 28 |
| Beryllium Copper | 6.9 | 48 |
| Brass | 5.8 | 40 |
| Bronze | 6.5 | 44.8 |
| Carbon Steel | 11.2 | 77 |
| Cast Iron | 5.9 | 41 |
| Concrete | 3.0 | 21 |
| Copper | 6.5 | 45 |
| Glass, 96% silica | 2.8 | 19 |
| Inconel | 11.5 | 79 |
| Iron, Ductile | 9.1 - 9.6 | 63 - 66 |
| Iron, Malleable | 9.3 | 64 |
| Kevlar | 2.8 | 19 |
| Lead | 1.9 | 13.1 |
| Magnesium | 2.4 | 16.5 |
| Molybdenum | 17.1 | 118 |
| Monel metal | 9.6 | 66 |
| Nickel Silver | 6.9 | 48 |
| Nickel Steel | 11 | 76 |
| Nylon | 0.59 | 4.1 |
| Phosphor Bronze | 5.9 | 41 |
| Plywood | 0.09 | 0.62 |
| Polycarbonate | 0.33 | 2.3 |
| Structural Steel | 29 | 200 |
| Stainless Steel | 11.2 | 77.2 |
| Steel, Cast | 11.3 | 78 |
| Steel, Cold-rolled | 10.9 | 75 |
| Titanium, Grade 2 | 5.9 | 41 |
| Titanium, Grade 5 | 5.9 | 41 |
| Titanium, 10% Vanadium | 6.1 | 42 |
| Wood, Douglas Fir | 1.9 | 13 |
| Z-nickel | 11 | 76 |
- 1 GPa = 0.145x106 psi (lbf/in2)
- 1 x 106 psi = 6.9 GPa
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