Micro-Scale Permeability Characterization of Carbon Fiber Composites Using Micrograph Volume Elements

To manufacture a high-performance structure made of continuous fiber reinforced plastics, Liquid Composite Molding processes are used, where liquid resin infiltrates the dry fibers. For good infiltration quality without spots, it is important to predict flow correctly. Knowledge local permeability an essential precondition for mold-filling simulations. In our approach, intra-bundle parallel and transverse fibers characterized via periodic fluid dynamic simulations micro-scale volume elements (VE). We evaluate compare two approaches: First, approach generate VEs based on statistical distribution diameters. Second, micrograph images samples manufactured with Tailored Fiber Placement (TFP) using measured distribution. The show higher heterogeneity than statistically generated VEs, which by large areas. This leads significantly different compared stochastic approach. conclusion, pure needs contain correct values.