The Mat orientation result shows the effect of the fiber-mat preform (fiber-mat) properties on the advancement of the melt-front.
In RTM and SRIM processes, resin is forced to flow through a cavity in which reinforcing fiber mat (also called preform) is present. The flow type, characterized by the properties of the fiber mat, may be isotropic or anisotropic, depending on the structure of the mat. The resistance of a resin to flowing through the mat also depends on the resin properties and flow rate.
The Fiber-mat orientation result indicates the principal direction 1 of an anisotropic fiber mat. This is the preferential flow direction that the resin follows during the filling phase. This direction corresponds to the major axis of an elliptic flow front, determined by the measurement of the fiber-mat permeabilities.