Shear modulus (3D fiber) results

The shear modulus, sometimes called the rigidity modulus, refers to the change produced by a tangential stress, and provides a measure of how stiff the material is.

Mesh type

• 3D

For analysis sequences that include

• Pack

To create these results, the Fiber orientation analysis if fiber material option must be selected, and a material with filler or fiber data must be chosen. This option can be found on the Fill+Pack Settings page of the Process Settings Wizard.

Tip: These results are not shown by default. To view these results, click (Result tab > Plots panel > New Plot) and select them from the list of available results.

Important: If these results do not appear in the list of available results, check that you have a shrinkage model selected. Click (Home tab > Molding Process Setup panel > Process Settings) and click Advanced options. Click Edit associated with Molding material and select the Shrinkage Properties tab. Select a shrinkage model.

Shear modulus (G12) result

The Shear modulus (G12) result shows the shear strain applied in the XY direction, coinciding with the fiber orientation direction. This result is recorded for each tetrahedral element in the model at the end of the analysis.

Shear modulus (G13) result

The Shear modulus (G13) result shows the shear strain applied in the XZ direction, or the direction perpendicular to the fiber orientation direction. This result is recorded for each tetrahedral element in the model at the end of the analysis.

Shear modulus (G23) result

The Shear modulus (G23) result shows the shear strain applied in the YZ direction, or third principal direction. This result is recorded for each tetrahedral element in the model at the end of the analysis.

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.

The Orthotropic set option is set by default and selects the 9 mechanical constants (E1, E2, E3, v12, v23, v13, G12, G23, G13) and 3 CTE’s (thermal expansion coefficient in first/second/third directions) all at once. In a Fiber analysis, the complete set of thermo-mechanical properties with orthotropic assumption is necessary for a Warp analysis. These properties are element-based, so each tetrahedral or beam element has its own orthotropic set of properties.

1. Click (Home tab > Molding Process Setup panel > Process Settings).
2. If necessary, click Next until you reach the Fill+Pack Settings page of the Wizard.
3. Select the option Fiber orientation analysis if fiber material, and then click Fiber parameters.
4. Click Composite property calculation options, and then from the Fiber-filled property output drop-down list, select Orthotropic set.

Using this result

Check the shear modulus through the part by animating the default contour plot, which will animate the result over the Normalized thickness. You can check these result for more detailed information on the shear modulus distribution.

Tip: Click (Results tab > Plots panel > New Plot) and under Plot type, click Path plot so that you can view the shear modulus distribution with respect to the model geometry.

Shear modulus is a mechanical property value. The distribution of this mechanical property is used by the structural analysis for its performance evaluation in a Stress analysis.