Three models in the Strength section of the Engineering Data Toolbox are supported in an Explicit Dynamics analysis:
Orthotropic Stress Limit
Orthotropic Strain Limit
Tsai-Wu Constants.
Adding any one of these models to a material in Engineering Data creates a material failure model in the Explicit Dynamics solver. For more information, see Introduction and Failure Models.
The table below lists the failure model names created in the Explicit Dynamics solver for the three Engineering Data models.
| Model Name in Engineering Data | Model Created in Explicit Dynamics solver |
|---|---|
| Orthotropic Stress Limits | Material Stress Failure |
| Orthotropic Strain Limits | Material Strain Failure |
| Orthotropic Stress Limits with Tsai-Wu Constants | Tsai/Hoffman/Hill Failure |
Not all of the input fields for these failure models are supported in the Explicit Dynamics solver. The table below summarizes which input fields are relevant for each failure model:
| 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).