Paper number 1102


Chyi-Lang Lai and Wen-Bin Young

Department of Aeronautics and Astronautics
National Cheng-Kung University
Tainan, Taiwan 70101, ROC

Summary In prediction of preforming shape for woven fabrics, the pin-jointed net model has the advantage of simple for using the geometric data only, and is a widely used method. However, it only deals with pure shear and neglects other possible deformation modes. In some cases, there is evidence showing that other deformation modes have certain relevance and effectiveness to the final forming shape. A model considering only the shear mode will not have an adequate prediction. In this study, a slippage model is developed to modify the pin-jointed net model. Macrostructure of the fabrics is included in the slippage model in order to capture more deformation modes. As in pin-jointed net model, the fabric is represented by a number of line segments, and four segments form a unit cell. The length of the unit cell of the fabric is allowed to change due to the slippage of the fiber yarn. Comparisons of experimental and simulation results are presented. As it can be seen that the numerical prediction using the slippage model has better agreement with experimental measurements.
Keywords resin transfer molding, fiber preform, woven fiber, molding.

Theme : Textiles ; Preform Processing and Testing

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