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Failure modeling of composite wing leading edge under bird strike

机译：鸟击下复合翼前缘的故障建模

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摘要

Bird strike analysis has been an essential work in aeroplane design and airworthiness assessment. This paper presents a numerical method to simulate the deformation and failure process of composite wing leading edges in bird impact events. First of all, constitutive models were proposed for each material that composed the front edge. Specially, the model for composite material has taken account for the nonlinear behavior, the strain rate dependency, as well as different failure modes. Employing the user subroutine program and the failure modeling techniques, numerical models were built for bird strike simulation. Then the model was validated through bird impact tests on two kinds of edge structure: a laminated one and a sandwich one. Numerical results of both structures show good agreements with the test observation, from the dynamic response to the ultimate failure characteristics. Based on the numerical method, optimal stacking sequences of each structure was found. The results show that the modeling method may help with the crashworthiness design of composite structures.
机译：鸟类罢工分析一直是飞机设计和适航评估的重要工作。本文介绍了模拟鸟类影响事件中复合翼前边缘的变形和故障过程的数值方法。首先，针对构成前边缘的每个材料提出了本构模型。特别地，复合材料模型已经考虑了非线性行为，应变率依赖性以及不同的故障模式。采用用户子程序程序和故障建模技术，为鸟击仿真构建了数值模型。然后通过两种边缘结构上的鸟类冲击试验验证了模型：层压一个和三明治一。两种结构的数值结果显示了与测试观察的良好协议，从对最终失败特征的动态响应。基于数值方法，发现了每个结构的最佳堆叠序列。结果表明，建模方法可有助于复合结构的耐火性设计。

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  • 来源
    《Composite Structures》 |2021年第1期|113005.1-113005.14|共14页
  • 作者

    Long Shuchang; Mu Xianlian; Liu Yuanhai; Wang Heran; Zhang Xiaoqing; Yao Xiaohu;

  • 作者单位

    South China Univ Technol Sch Civil Engn & Transportat Guangzhou 510640 Guangdong Peoples R China;

    China Special Vehicle Res Inst Aviat Key Lab Sci & Technol Struct Corros Prevent Jingmen 448035 Hubei Peoples R China;

    China Special Vehicle Res Inst Aviat Key Lab Sci & Technol Struct Corros Prevent Jingmen 448035 Hubei Peoples R China;

    South China Univ Technol Sch Civil Engn & Transportat Guangzhou 510640 Guangdong Peoples R China;

    South China Univ Technol Sch Civil Engn & Transportat Guangzhou 510640 Guangdong Peoples R China;

    South China Univ Technol Sch Civil Engn & Transportat Guangzhou 510640 Guangdong Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Bird strike; Fiber-reinforced composite; Numerical simulation; Optimal design;

    机译：None;

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