航空学报 > 2023, Vol. 44 Issue (18): 428267-428267   doi: 10.7527/S1000-6893.2023.28267

二维与三维机织复合材料面内力学性能对比

孙洋1, 黄建1(), 韩晨晨1, 赵振强2, 周海丽1, 孙方方1, 李超1, 张超2, 张立泉1   

  1. 1.南京玻璃纤维研究设计院有限公司,南京  210000
    2.西北工业大学 民航学院,西安  710072
  • 收稿日期:2022-11-15 修回日期:2022-12-07 接受日期:2023-02-09 出版日期:2023-05-15 发布日期:2023-02-17
  • 通讯作者: 黄建 E-mail:huangjian201305@163.com
  • 基金资助:
    国家科技重大专项(2017-VII-0011-0106);江苏省基础研究计划(自然科学基金)(BK20220165)

Comparison of in-plane mechanical properties of 2D and 3D woven composites

Yang SUN1, Jian HUANG1(), Chenchen HAN1, Zhenqiang ZHAO2, Haili ZHOU1, Fangfang SUN1, Chao LI1, Chao ZHANG2, Liquan ZHANG1   

  1. 1.Nanjing Fiberglass Research and Design Institute Co. ,Ltd. ,Nanjing  210000,China
    2.School of Civil Aviation,Northwestern Polytechnical University,Xi’an  710072,China
  • Received:2022-11-15 Revised:2022-12-07 Accepted:2023-02-09 Online:2023-05-15 Published:2023-02-17
  • Contact: Jian HUANG E-mail:huangjian201305@163.com
  • Supported by:
    National Science and Technology Major Project(2017-VII-0011-0106);Foundation Research Project of Jiangsu Province (the Natural Science Fund)(BK20220165)

摘要:

设计并制备了结构形式和工艺参数相同的二维机织层合和三维机织复合材料,利用数字图像同步测试技术(DIC)系统地开展了经、纬向拉伸、压缩试验和面内剪切试验。结合试样表面应变场的演化过程和断裂形貌分析,对比研究了二维机织层合复合材料和三维机织复合材料的承载机制、力学性能和失效机制的差异。结果表明,经纱在层间的交织联锁对机织复合材料的宏观力学行为和承载机制有重要影响,三维机织复合材料牺牲了经向拉伸和压缩性能,得到了更好的结构整体性和更高的纬向性能。此外,三维机织复合材料的经向拉伸应力-应变曲线具有明显的非线性特征。同时,经纱对纬纱的强约束导致了纤维束/基体界面上的弱粘接,降低了三维机织复合材料抵抗剪切变形的能力。

关键词: 二维机织层合复合材料, 三维机织复合材料, 力学性能, 失效机制, 层层交联互锁结构

Abstract:

2D and 3D woven composites with the same structure form and weaving process parameters were designed and prepared. Tensile, compressive and in-plane shear tests were systematically carried out by the digital image correlation method. The mechanical properties, carrying and failure mechanism of 2D and 3D woven composites were studied in combination with the evolution of surface strain field and fracture morphology. It is shown that the interlocking of warp yarns between layers significantly influences the macroscopic mechanical behavior and carrying mechanism of woven composites. 3D woven composite exhibits better structural integrity and weft mechanical properties at the expense of decrease in warp mechanical performance. Furthermore, the warp tensile strain-stress curves of 3D woven composites have a typical characteristic of nonlinearity. The constraint between warp yarn and weft yarn leads to the weak interface between fiber and matrix, which reduces the in-plane shear capacity of 3D woven composite.

Key words: 2D woven composites, 3D woven composites, mechanical properties, failure mechanism, layer-to-layer interlock structure

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