Experimental research of saturated permeability with different fiber stacking states
Zuoguang Zhang · Fuhe cailiao xuebao · 2006
By regulating the pressure to control the volume fraction of fibers V_(f),the saturated permeability along the thickness of the fiber bed was measured by the unidirectional saturated flow method.The influence of pressure on V_(f) was investigated.Several factors which affect the permeability were studied,including V_(f),the number of layers of the fiber bed,the ply stacking sequence and the kinds of fibers.The results indicate that the degree of increase of V_(f) with pressure decreases when V_(f) exceeds a critical value.The number of layers does not affect the permeability for the unidirectional and bidirectional ply stacking while for the plain weave the permeability decreases with the number of layers.In addition,the kinds of fibers influence the permeability remarkably.