The Shear modulus (G23) result indicates the shear strain applied in the YZ direction (second and third principal directions).
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.
This result is generated from a Fiber orientation Pack analysis using 3D analysis technology.
The Shear modulus (G23) result is recorded for each tetrahedral element in the model at the end of the analysis.
The thermo-mechanical property calculation for fiber-filled composites are 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.