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首页> 外文期刊>Journal of aerospace engineering >Curvilinear Fatigue Crack Growth Simulation and Validation under Constant Amplitude and Overload Loadings
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Curvilinear Fatigue Crack Growth Simulation and Validation under Constant Amplitude and Overload Loadings

机译：恒定振幅和超载作用下的曲线疲劳裂纹扩展模拟与验证

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摘要

A concurrent simulation and experimental validation for curvilinear fatigue crack growth (FCG) analysis under both constant amplitude and overload spectrums is proposed in this paper. The simulation methodology is based on a small time-scale fatigue crack growth model and the extended finite element method (XFEM) to calculate the stress intensity factor solution of an arbitrary curvilinear crack. Parametric studies are used to determine the algorithm parameters in the numerical fatigue crack growth simulation. Following this, experimental testing on modified compact specimens is performed under both constant amplitude and overload loadings for model validation. Experimentally measured crack growth orientations and lengths are compared with numerical simulations. Both the experimental and simulation results show the overload retardation behavior for curvilinear cracks under overload loadings. The investigated periodic overload loading has no significant impact on the crack growth orientations. Several conclusions and areas of future work are identified based on the proposed numerical and experimental investigations.
机译：提出了在恒定振幅和过载谱下曲线疲劳裂纹扩展（FCG）分析的并行仿真和实验验证。该模拟方法基于小型时标疲劳裂纹扩展模型和扩展有限元方法（XFEM），以计算任意曲线裂纹的应力强度因子解。参数研究用于确定数值疲劳裂纹扩展模拟中的算法参数。此后，在恒定振幅和过载载荷下都对修改后的紧凑型样本进行了实验测试，以进行模型验证。将实验测量的裂纹扩展方向和长度与数值模拟进行比较。实验和仿真结果均显示了曲线裂纹在超载下的超载延迟行为。研究的周期性过载载荷对裂纹扩展方向没有显着影响。根据提出的数值和实验研究，确定了一些结论和未来工作的领域。

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  • 来源
    《Journal of aerospace engineering》 |2015年第1期|04014054.1-04014054.10|共10页
  • 作者

    Zizi Lu; Jifeng Xu; Lei Wang; Jianren Zhang; Yongming Liu;

  • 作者单位

    Beijing Aeronautical Science and Technology Research Institute, Beijing 100080, China;

    Beijing Aeronautical Science and Technology Research Institute, Beijing 100080, China;

    School of Civil Engineering and Architecture, Changsha Univ. of Science and Technology, Changsha, Hunan 410004, China;

    School of Civil Engineering and Architecture, Changsha Univ. of Science and Technology, Changsha, Hunan 410004, China;

    Arizona State Univ., 1151 S. Forest Ave., Tempe, AZ 85281;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Curvilinear crack; Overload; Extended finite element method (XFEM); Fatigue crack growth;

    机译：曲线裂纹超载;扩展有限元法（XFEM）;疲劳裂纹增长;

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