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Numerical and experimental investigations on fretting fatigue properties of GH4169 superalloy at the elevated temperature

机译：高温GH4169超合金疲劳性能的数值和实验研究

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摘要

Fretting fatigue is a detrimental phenomenon in aeronautic industry, where the appropriate methods for crack location prediction and total life prediction are vital. In the present paper, both experimental and numerical approaches were developed for GH4169 superalloy with different interference magnitudes at 650 °C. Three fretting crack initiation models were compared for crack location prediction, among which the SWT model was extended to describe the initiation face in the three-dimensional model considering the subsurface stresses. Moreover, three propagation models were conducted for crack growth rate calculation. One of the methods was the combination of the linear superposition model with the Harter-T method, which emphasized the compression load effect on the driving force of crack propagation rates and the negative stress ratio variation impact. Finally, the life prediction approach was proposed using the averaged SWT parameters combined with the composite propagation model. The obtained total life estimations were found to agree well with the experimental results.
机译：烦恼疲劳是航空工业中的不利现象，其中裂缝定位预测和总寿命预测的适当方法至关重要。在本文中，在650℃下为GH4169高温合金开发了实验和数值方法。比较了三个微裂裂纹启动模型，用于裂缝定位预测，其中SWT模型扩展到考虑到地下应力的三维模型中的起始面。此外，进行了三种繁殖模型，用于裂纹生长速率计算。其中一种方法是线性叠加模型与竖琴T方法的组合，这强调了对裂纹传播速率的驱动力和负应力比变异影响的压缩负荷效应。最后，使用与复合传播模型组合的平均SWT参数提出了寿命预测方法。发现获得的总寿命估计与实验结果很好。

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  • 来源
    《International Journal of Fatigue》 |2021年第8期|106274.1-106274.15|共15页
  • 作者

    Jingchen Wang; Yukui Gao;

  • 作者单位

    School of Aerospace Engineering and Applied Mechanics Tongji University No. 100 Zhangwu Road 200092 Shanghai People's Republic of China;

    School of Materials Science and Engineering Tongji University No. 4800 Caoangong Road 201804 Shanghai People s Republic of China Shanghai Key Laboratory of R&D for Metallic Function Materials No. 4800 Caoangong Road 201804 Peoples Republic of 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

    Fretting fatigue; FRANC3D; Critical plane method; Stress intensity factor; Fractography;

    机译：烦恼疲劳;弗兰克3D;临界平面方法;压力强度因子;Fractography.;

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