This paper investigates the mechanical behaviors of thermoplastic woven prepregs via testing and forming experiments. Glass twill fabric/polypropylene prepregs are produced by chemical treatment on fabric surface and a hot pressure molding approach. Then, mechanical tests including uniaxial tensile and bias extension of the glass twill fabric and its prepregs are carried out to provide basic data set for material modelling. An anisotropic hyperelastic model based on strain energy decomposition is proposed. And its material parameters are obtained by fitting these experimental data. Hemispherical thermo-stamping experiments are implemented for model verification. Very good agreements between forming simulation results and experimental data including boundary profiles, local shear angles, and forming force magnitude are obtained. The present work provides a complete data set for the model development and verification of thermoplastic woven fabric prepregs.

中文翻译：

---

玻璃斜纹织物/聚丙烯预浸料的测试、表征和成型

本文通过测试和成型实验研究了热塑性编织预浸料的机械性能。玻璃斜纹织物/聚丙烯预浸料是通过织物表面的化学处理和热压成型方法生产的。然后，进行机械测试，包括玻璃斜纹织物及其预浸料的单轴拉伸和偏置延伸，为材料建模提供基本数据集。提出了一种基于应变能分解的各向异性超弹性模型。并通过拟合这些实验数据得到其材料参数。实施半球形热冲压实验以进行模型验证。成形模拟结果与实验数据（包括边界轮廓、局部剪切角和成形力大小）之间获得了非常好的一致性。