The following table summarizes the applicable strength-limit constants for each failure criterion:
Strength Limit Constant | Orthotropic Stress Limit | Orthotropic Strain Limit | Tsai-Wu Constants |
Tensile X-Direction |
Y |
Y |
Y |
Tensile Y-Direction |
Y |
Y |
Y |
Tensile Z-Direction |
Y |
Y | |
Compressive X |
Y | ||
Compressive Y |
Y | ||
Compressive Z | |||
Shear XY |
Y |
Y |
Y |
Shear YZ |
Y |
Y | |
Shear XZ |
Y |
Y | |
Coupling Coefficient XY | |||
Coupling Coefficient YZ | |||
Coupling Coefficient XZ |
Tsai-Wu Constants must be used in conjunction with Orthotropic Stress Limit. Tsai-Wu Constants used in conjunction with Orthotropic Strain Limit are not supported.
The TSai-Wu coefficients are always reset to -1 in an Explicit solve. The Tsai-Wu Constants property changes how the Explicit Dynamics solver uses the data from the Orthotropic Stress Limit property. Without the Tsai-Wu Constants property, the Explicit Dynamics solver uses all three tensile stress and all three shear stress constants from the Orthotropic Stress Limit. With the Tsai-Wu Constants property, the Explicit Dynamics solver uses the tensile and compressive stress constants in the X and Y direction only (not Z) and the XY shear stress constant (not YZ and XZ shears).