Abstract:In order to study the in-plane shear properties of glass fiber plain weave laminates, an in-plane shear progressive failure analysis model was established. Based on Ramberg-Osgood equation, a nonlinear constitutive model was developed to describe in-plane shear. VUMAT subroutine was written to set Hashin failure criterion and stiffness degradation criterion. The in-plane shear process of glass fiber plain woven laminates was simulated by ABAQUS / explicit solver. The results show that the nonlinear model can well describe the nonlinearity of in-plane shear; in the process of in-plane shear, the shear failure of fiber matrix occurs first, then the tensile failure of warp and weft fibers, and finally the compression failure of warp and weft fibers; the predicted in-plane shear strength, initial shear modulus, displacement-load curve and failure mode are consistent with the experimental results, which proves the effectiveness of the progressive failure analysis model.