Shear Modulus
Enter positive values for the shear moduli of the material. You can define this property or assign a parameter to the property. You can either type a value or rightclick to assign a
Parameter as appropriate.
For orthotropic material properties, enter values for:
• G12
• G13
• G23
These values represent the shear modulus in each of the three material directions.
For transversely isotropic material properties, enter a value for the shear modulus of the material in two of the three principal planes of the material. The Material Definition dialog box shows the following shear modulus values:
• G12 = G13
• G23 = E3/(2 X (1 + Nu32))
Enter a single positive value for the 21 and 31 planes. Structure automatically calculates the value for the 32 plane, using the equation shown on the dialog box.

For both orthotropic and transversely isotropic, G21 is also denoted as G12, G31 as G13, and G32 as G23.
