The Poisson’s ratio (v23) result indicates the strain in the third principal direction caused by the stress in the second principal direction.
In general, vij = Poisson’s ratio for transverse strain in the j-direction when stressed in the i-direction.
This result is generated from a Fiber orientation Pack analysis using 3D analysis technology.
The Poisson’s ratio (v23) 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.