The Composite mechanical properties values dialog for the fiber mat composite (3D) is used to specify the properties of the fiber mat composite material, for use in a warp analysis in Resin Transfer Molding (RTM).
To access this dialog, select the preform elements on your model, click
(), or right-click and select
Properties, then select the
Composite Properties tab. Click
Edit associated with the
Fiber mat composite, select the
Mechanical Properties of composite tab, select
Specified from the drop-down menu, and click
Edit values.
The thermo-mechanical property calculation for fiber-filled composites is based on the orthotropic assumption that fiber-filled material properties are different in three orthogonal principal directions. Under this assumption, there are 9 independent mechanical constants and three independent thermal expansion coefficients.
Nine (9) mechanical constants (E1, E2, E3, v12, v23, v13, G12, G23, G13) and three (3) CTE’s (thermal expansion coefficient in first/second/third directions) are used in the calculation. In a Fiber analysis, this complete set of thermo-mechanical properties with orthotropic assumption is necessary for a Warp analysis.
| Symbol | Explanation |
|---|---|
| E1 | Elastic modulus, parallel to the flow |
| E2 | Elastic modulus, perpendicular to the flow |
| E3 | Elastic modulus, through the thickness |
| v12 | In-plane Poisson's ratio |
| v23 | Out-of-plane Poisson's ratio perpendicular to the flow |
| v13 | Out-of-plane Poisson's ratio parallel to the flow |
| G12 | In-plane Shear modulus |
| G23 | Out-of-plane Shear modulus perpendicular to the flow |
| G13 | Out-of-plane Shear modulus parallel to the flow |
| Alpha1 | Thermal expansion coefficient in the flow direction. |
| Alpha2 | Thermal expansion coefficient in the transverse direction. |
| Alpha3 | Thermal expansion coefficient through the thickness |