Tensile modulus (3D fiber) (overmolding) results

The Tensile modulus (3D fiber) (overmolding) results indicate how much stress is needed to cause a unit of movement in the overmolded part.

Mesh type:
Analysis sequences that include:

The tensile modulus is calculated for every tetrahedral element, through the thickness of the part, at the end of the analysis, using the fiber orientation tensor at that tetrahedral element. These results are used by the CRIMS shrinkage correction model and the uncorrected residual stress model. You can view the expansion coefficient at each node by animating the default contour plot, which will animate the result through the part.

Orthotropic assumption

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.

Using these results

The first principal direction coincides with the fiber orientation first principal direction, and is determined by the Fiber orientation Fill+Pack analysis. The second principal direction is perpendicular to the first principal direction. You should expect more pressure to be required in the first principal direction, and less pressure in the third principal direction, as the fiber orientation increases. If the molecules are randomly aligned, then the results will be similar in all directions.

View these results in conjunction with one another to determine the average tensile moduli pressures (MPa) in all three principal directions.

Parent topic: Overmolding results