Computer Simulation of the Deformation of Weft-Knitted Fabrics for Composite Materials

Abstract

Abstract A new method for predicting the deformation behaviour and the related mechanical properties of weft-knitted fabrics is presented. A two-dimensional hexagonal mechanical model is derived, which is based on the geometrical structure of plain-stitch fabric. An analytical method of converting the experimental data of the knitted fabric into the parameters of the model is proved to be effective. By using the model-knitted fabric, the elongation deformation is simulated, and the calculated results are compared with the experimental data in order to verify the validity of the model. Moreover, the slippage effect experienced with knitted fabrics is introduced into the model to simulate the greater deformation which occurs with improved accuracy. The model can also predict deformation and related mechanical quantities in the case of three-dimensional deformations.