Simulation of Fiber Orientation in Dumbbell-Shaped Injection Cavity

Understanding rules of the distribution of fiber is important to control the mechanical properties of composite material performance. Fiber orientation in dumbbell-shaped injection cavity is different from that in regular cuboids because of its complex shape. Fiber orientation equation, Fokker - Planck equation was solved by the finite volume method and the errors brought by approximate method were avoided. The calculation results verified demonstrated that the shape of injection cavity affected the fiber orientation. In the flow direction, fiber of the shrinkage zone oriented along the flow direction and of the dilation zone oriented along tensile direction which is vertical to the flow. In cavity thickness direction, fiber orientation was layered.