The value of the shear modulus for aluminum is about 3.5 × 10 6 psi, or 2.4 × 10 1 0 N/m 2. | Contact. Applied.com. In materials science, shear modulus or modulus of rigidity, denoted by G, or sometimes S or μ, is defined as the ratio of shear stress to the shear strain: The following chart gives typical values for the shear modulud of rigidity. The shear modulus is one of several quantities for measuring the stiffness of materials. Hence steel is a lot more rigid than plywood, about 127 times more! Shear modulus is used to explain how a material resists transverse deformations. The modulus of elasticity (Young's modulus) of structural steel is specified in the design standard EN 1993-1-1 Section 3.2.6. The shear strain is defined as ∆x/L. no longer elastic body. For isotropic materials within the elastic region, you can relate Poisson’s ratio (ν), Young’s modulus of elasticity (E), and the shear modulus of elasticity (G): Shear Modulus of Elasticity. For structural design it is standard practice to consider the unit weight of structural steel equal to γ = 78.5 kN/m3 and the density of structural steel approximately ρ = 7850 kg/m3. Excel App. The A36 steel Poisson's Ratio is 0.26, and A36 steel Shear Modulus is 75 GPa (10,900 ksi). You can provide the following project data as page header. The ratio of shear stress and shear strain is called shear modulus. The unit weight of structural steel is specified in the design standard EN 1991-1-1 Table A.4 between 77.0 kN/m3 and 78.5 kN/m3. Maximum shear modulus, G max, is also called initial shear modulus or low-amplitude shear modulus.It represents the stress–strain backbone curve’s slope at the origin.