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An eigenstrain-based finite element model and the evolution of shot peening residual stresses during fatigue of GW103 magnesium alloy

机译:基于特征应变的有限元模型及GW103镁合金疲劳时喷丸强化残余应力的演变

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摘要

Magnesium alloy GW103 samples were heat treated to different ageing conditions and then shot peened using process parameters that deliver optimized high cycle fatigue (HCF) life. Significant HCF life improvements were observed in all samples, with a peak-aged sample showing the biggest increase. In order to simulate the effect and evolution of residual stresses during low cycle fatigue (LCF), a Finite Ele ment (FE) model was employed, taking into account both the shot-peening-induced plastic strains and the influence of hardening on subsequent deformation. Experimental and modelling results offer a basis for explaining the observed fatigue performance improvement due to shot peening.
机译:将镁合金GW103样品热处理到不同的时效条件,然后使用可提供最佳的高循环疲劳(HCF)寿命的工艺参数进行喷丸处理。在所有样品中均观察到HCF寿命显着提高,峰值时效样品显示出最大的增长。为了模拟低周疲劳(LCF)期间残余应力的影响和演变,采用有限元模型(FE),同时考虑了喷丸硬化引起的塑性应变以及硬化对后续变形的影响。实验和建模结果为解释观察到的由于喷丸硬化引起的疲劳性能改善提供了基础。

著录项

  • 来源
    《International Journal of Fatigue》 |2012年第2012期|p.284-295|共12页
  • 作者单位

    Department of Engineering Science, University of Oxford, Parks Road, Oxford 0X1 3PJ, UK;

    Department of Engineering Science, University of Oxford, Parks Road, Oxford 0X1 3PJ, UK,National Engineering Research Centre of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao long University, Shanghai 200240, China;

    Department of Engineering Science, University of Oxford, Parks Road, Oxford 0X1 3PJ, UK;

    National Engineering Research Centre of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao long University, Shanghai 200240, China;

    National Engineering Research Centre of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao long University, Shanghai 200240, China;

    National Engineering Research Centre of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao long University, Shanghai 200240, China,Key State Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai jiao Tong University, Shanghai 200240, China;

    ID15B, ESRF, 6 Rue Jules Horowitz, Grenoble, France;

    ID15B, ESRF, 6 Rue Jules Horowitz, Grenoble, France;

    Department of Engineering Science, University of Oxford, Parks Road, Oxford 0X1 3PJ, UK;

    Department of Engineering Science, University of Oxford, Parks Road, Oxford 0X1 3PJ, UK;

  • 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

    shot peening; ageing; magnesium alloy; residual stress; eigenstrain;

    机译:喷丸老化;镁合金残余应力本征应变;

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