This article aims to establish a full‐size mesostructure model of three‐dimensional (3D) braided composites based on the real structural characteristics, to explore the transverse impact response characteristics and failure mechanism of 3D braided composites at different impact speeds. The results showed that four stress wave cycles were applied on the composite and decreased gradually. The corresponding displacement, peak load, and energy absorption capacity were investigated. All the values increased with the increase of impact velocity. In addition, the stress propagation features into length, width, and thickness directions of composite were distinctly different. Finally, the failure modes and damage morphologies were examined to reveal the failure mechanism of 3D braided composite under transverse impact loading.

中文翻译：

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细观3D编织复合材料的横向冲击响应及破坏机理

本文旨在基于真实的结构特征建立三维（3D）编织复合材料的全尺寸细观结构模型，以探讨3D编织复合材料在不同冲击速度下的横向冲击响应特性和破坏机理。结果表明，在复合材料上施加了四个应力波循环，并逐渐减小。研究了相应的位移，峰值载荷和能量吸收能力。所有值都随着冲击速度的增加而增加。此外，复合材料在长度，宽​​度和厚度方向上的应力传播特征明显不同。最后，研究了破坏模式和破坏形态，揭示了在横向冲击载荷下3D编织复合材料的破坏机理。