复合材料科学与工程 ›› 2026, Vol. 0 ›› Issue (4): 132-137.DOI: 10.19936/j.cnki.2096-8000.20260428.016

• 设计与工艺 • 上一篇    下一篇

单向纤维铺缝复合材料单轴拉伸性能试验及模拟研究

马元春1, 闫丽1, 耿小亮2, 张恒2   

  1. 1.中航复合材料有限责任公司 民用航空事业部,北京 101300;
    2.西北工业大学 力学与土木建筑学院,西安 710129
  • 收稿日期:2025-03-28 发布日期:2026-06-16
  • 作者简介:马元春(1973—),男,博士,高级工程师,研究方向为复合材料结构设计与分析,zllmyc@ sina.com。

Experimental and simulation research on the uniaxial tensile properties of unidirectional fiber composite materials

MA Yuanchun1, YAN Li1, GENG Xiaoliang2, ZHANG Heng2   

  1. 1. Civil Aviation Division, AVIC Composite Corporation Ltd., Beijing 101300, China;
    2. School of Mechanics and Civil Engineering, Northwestern Polytechnical University, Xi’an 710129, China
  • Received:2025-03-28 Published:2026-06-16

摘要: 本文针对以纤维变角度牵引铺缝技术制备的1311RTM/GW300单向纤维复合材料层合板,开展了单轴拉伸试验与数值仿真,探索了纤维偏转对材料力学性能及失效模式的影响。结果表明,相比于无铺缝试样,铺缝试样的拉伸强度与刚度均有所下降,断裂位置及裂纹扩展路径与缝纫针脚分布吻合,说明纤维局部方向偏转对力学性能产生影响。采用反映针脚处纤维偏转特征的建模方法,并结合Hashin损伤准则模拟纤维偏转与损伤演化,预测所得拉伸强度与模量同试验结果一致,应变分布特征与试验结果相同。

关键词: 变角度牵引铺缝, 复合材料, 单轴拉伸, 纤维偏转

Abstract: This study investigates the uniaxial tensile behavior and numerical simulation of 1311RTM/GW300 unidirectional fiber composite laminates fabricated by variable-angle tow steering seam laying technology, aiming to explore the influence of fiber orientation deviation on mechanical properties and failure modes. The results indicate that, the stitched specimens exhibit reduced tensile strength and stiffnesscompared to non-stitched specimens. The fracture locations and crack propagation paths consistently correspond to the distribution of stitching needle traces, demonstrating that local fiber orientation deflection affects mechanical performance. A modeling approach reflecting fiber deflection characteristics at stitch points is developed, combined with Hashin’s damage criterion to simulate fiber deflection and damage evolution. The predicted tensile strength and modulus exhibit good agreement with experimental results, and the strain distribution characteristics match the test observations.

Key words: variable angle tow placement, composite materials, uniaxial tensile test, fiber deflection

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