Theoretical Modeling of Large Shear Deformation and Wrinkling of Plain Woven Composite

In hot stamping operations, the primary deformation mode of plain woven textile composite is shear deformation between yarns. In-plane picture frame test is an effective method to characterize the material's shear behavior. By proposing theoretical models based on our experimental study [19,20], the present article estimates the non-linear stiffness of the textile fabric during large shear deformation and the onset of wrinkling under additional yarn tension/compression at various temperatures. The relevant properties of materials are determined from experiments, and general mathematical expressions are formulated to predict the shear energy and the critical shear angle for textile composite fabrics of similar types. In addition, the size effect of the test sample is also investigated.