Woven fabric thermoplastic composites possess high specific strength and stiffness along with thermoformability. To utilize the full potential of these materials to achieve better crash-safe designs in automotive structural parts, the measurement of non-linear shear behavior and its material modeling for FEM simulations is required. The standard testing method was used to measure the pure shear behavior of woven fabric composites. These results were compared with the shear behavior of material in the presence of normal stresses along the fiber direction. Tensile and compression cyclic testing of ± 45° laminate were carried out to measure the stiffness degradation and hardening of the material in the presence of tensile normal and compression normal stress. A methodology is proposed for taking into account the differences in shear behavior under different loading directions in an FEM simulation. Based on the experimental evidence, improvements in the mathematical description of plasticity and damage in continuum damage mechanics models are proposed. The model was implemented as a user-defined material subroutine (VUMAT) for Abaqus. The experimental results from coupon tests were used to verify the results of a single element simulation. Finally, a three-point bending test was used to validate the predictions of the user material model.

机织织物热塑性复合材料具有较高的比强度和刚度以及热成型性。为了充分利用这些材料的潜力，以在汽车结构部件中实现更好的防撞设计，需要进行非线性剪切行为的测量及其用于FEM仿真的材料建模。使用标准测试方法测量机织织物复合材料的纯剪切性能。将这些结果与沿纤维方向存在正应力的材料的剪切行为进行了比较。进行±45°层压板的拉伸和压缩循环测试，以测量在存在拉伸法向应力和压缩法向应力的情况下材料的刚度下降和硬化。提出了一种在有限元模拟中考虑不同载荷方向下的剪切行为差异的方法。基于实验证据，提出了在连续损伤力学模型中对可塑性和损伤进行数学描述的改进方法。该模型被实现为Abaqus的用户定义的物料子例程（VUMAT）。试样测试的实验结果用于验证单元素模拟的结果。最后，使用三点弯曲测试来验证用户材料模型的预测。该模型被实现为Abaqus的用户定义的物料子例程（VUMAT）。试样测试的实验结果用于验证单元素模拟的结果。最后，使用三点弯曲测试来验证用户材料模型的预测。该模型被实现为Abaqus的用户定义的物料子例程（VUMAT）。试样测试的实验结果用于验证单元素模拟的结果。最后，使用三点弯曲测试来验证用户材料模型的预测。