Shear modulus (overmolding) 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:
Analysis sequences that include:

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.

Shear modulus (averaged) (overmolding) result

The Shear modulus (averaged) (overmolding) result shows the shear strain on the overmolded component, applied in the XY direction, coinciding with the fiber orientation direction.

The Shear modulus (averaged) (overmolding) result is a fiber-over-thickness (FOT) averaged value, which means that it is calculated for every element of the overmolded component, on every laminate, and then for each element it is averaged over all the laminates.

Shear modulus (G12) (overmolding) result

The Shear modulus (G12) (overmolding) result shows the shear strain on the overmolded component, applied in the XY direction, and coinciding with the fiber orientation direction. This result is laminate-based, recorded for each element on each laminate in the model, over the duration of the analysis. Thus, each laminate in the model will have a different result.

Shear modulus (G13) (overmolding) result

The Shear modulus (G13) (overmolding) result shows the shear strain on the overmolded component, applied in the XZ direction, or the direction perpendicular to the fiber orientation direction. This result is laminate-based, recorded for each element on each laminate in the model, over the duration of the analysis. Thus, each laminate in the model will have a different result.

Shear modulus (G23) (overmolding) result

The Shear modulus (G23) (overmolding) result shows the shear strain on the overmolded component, applied in the YZ direction, or third principal direction. This result is laminate-based, recorded for each element on each laminate in the model, over the duration of the analysis. Thus, each laminate in the model will have a different result.

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. In models analysed using Midplane or Dual Domain analysis technologies, because of the plain stress assumption in the shell structure analysis in Warp, only 4 mechanical constants (tensile modulus in first/second principal directions, Poisson ratio v12, shear modulus G12) are necessary, and only these four are used in the (averaged) results.

The Orthotropic set option is set by default and, unless the results are averaged, 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.
Note: To access the Orthotropic set option ensure you have selected an analysis sequence that includes Fill+Pack.
  1. Click Process SettingsHome 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

The Shear modulus (averaged) (overmolding) result is a fiber-over-thickness (FOT) averaged value, therefore, it is an element-based value averaged over all the laminates of each element.

The other shear modulus (overmolding) results are laminate-based, therefore, you can check the shear modulus in each laminate 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.

You can view the contour plot of a single laminate on the model, by clicking (Results tab > Properties panel > Plot Properties). Select the Animation tab, and from the Animate result over drop-down list, select Single dataset.

Tip: Click (Result tab > Plots panel > New Plot) and create this result as an XY or Path plot also, so you can view the shear modulus at a particular element, or 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.