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An analytical constitutive model for progressive damage analysis of three-dimensional braided composites

机译：三维编织复合材料逐步损伤分析分析构成模型

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摘要

This study investigates the progressive damage behavior of three-dimensional (3D) braided composites using a new analytical constitutive model. The composite microstructure is represented by yarns and an out-of-yarn matrix. The progressive damage behavior of yarns is modeled by a 3D Linde failure criterion, and that of the out-of-yarn matrix is modeled by an extended Drucker-Prager criterion. A bridging model is used to establish stress and strain relations between fiber and polymer matrix. Thus, the constitutive model of 3D braided composites is developed in the form of a system of analytical equations, and a numerical solution for the equation set is provided in this study. The elastic modulus, the strength constants, and the stress-strain behavior of 3D braided composites under tension and shear are computed by the model, and the results are consistent with the finite element results and the experimental data. The nonlinear damage behavior of 3D braided composites under unidirectional tension, compression, and shear is analyzed. The composite materials show repeated stiffness degradations during damage evolution because of successive failures of different compositions. Damage behavior depends significantly on the stress states and braiding structures of the composites. Braiding angle and fiber volume fraction mainly influence the mechanical properties of the composites, but barely affect the failure modes and tendencies of stress-strain curves. POLYM. COMPOS., 39:4188-4204, 2018. (c) 2017 Society of Plastics Engineers
机译：本研究研究了使用新的分析本构模型的三维（3D）编织复合材料的逐渐损伤行为。复合微观结构由纱线和纱线外基质表示。纱线的渐进损伤行为由3D焊盘故障标准建模，纱线外矩阵的逐步模拟由延长的Drucker-Prager标准进行建模。桥接模型用于建立纤维和聚合物基质之间的应力和应变关系。因此，3D编织复合材料的本构模型以分析方程的系统的形式开发，并且在该研究中提供了用于等式集的数值解决方案。张力和剪切下3D编织复合材料的弹性模量，强度常数和应力 - 应变行为由模型计算，结果与有限元结果和实验数据一致。分析了三维编织复合材料下的非线性损伤行为在单向张力，压缩和剪切下。由于不同组成的连续故障，复合材料显示在损伤进化期间的反复僵硬降解。损坏行为在显着取决于复合材料的应力状态和编织结构上。编织角和纤维体积分数主要影响复合材料的机械性能，但几乎不会影响应力 - 应变曲线的故障模式和趋势。聚合物。 Compos。，39：4188-4204,2018。（c）2017年塑料工程师协会

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  • 来源
    《Polymer Composites》 |2018年第11期|共17页
  • 作者

    Tian Ziyang; Yan Ying; Ye Jinxin; Hong Yang; Li Xin;

  • 作者单位

    Beihang Univ Sch Aeronaut Sci &

    Engn Beijing 100191 Peoples R China;

    Beihang Univ Sch Aeronaut Sci &

    Engn Beijing 100191 Peoples R China;

    Beihang Univ Sch Aeronaut Sci &

    Engn Beijing 100191 Peoples R China;

    Beihang Univ Sch Aeronaut Sci &

    Engn Beijing 100191 Peoples R China;

    Beihang Univ Sch Aeronaut Sci &

    Engn Beijing 100191 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 增强塑料、填充塑料;
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