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A study on influence factors of small punch creep test by experimental investigation and finite element analysis

机译：通过实验研究和有限元分析研究小冲头蠕变试验的影响因素

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摘要

Small punch creep (SPC) tests for SUS304 and Cr5Mo specimens with dimension O10 mm × 0.5 mm were performed at different temperatures, load levels and atmospheres. Based on these tests, a finite element model (FEM) combined with modified Kachanov-Rabotnov (K-R) creep damage constitutive equations was established to simulate the ductile and creep damage of the round specimen during the test procedure. The validity of FEM was proved by the comparison of Center deflection-Time data yielded from finite element analysis (FEA) and experiment. Then, effects of sample thickness, load level, ceramic ball diameter, specimen diameter, temperature and protective atmosphere on SPC test were analyzed by experimental investigation and FEA. The results show that five of the six above-mentioned factors (except specimen diameter) influence the rupture time, center deflection, real creep strain and creep damage of SPC specimen strongly.
机译：在不同的温度，载荷水平和气氛下，对尺寸为O10 mm×0.5 mm的SUS304和Cr5Mo试样进行了小冲孔蠕变（SPC）测试。基于这些测试，建立了有限元模型（FEM）和改进的Kachanov-Rabotnov（K-R）蠕变损伤本构方程，以模拟圆形试样在测试过程中的延性和蠕变损伤。有限元分析的有效性是通过有限元分析（FEA）和实验得到的中心变形时间数据的比较证明的。然后，通过实验研究和有限元分析，分析了样品厚度，载荷水平，陶瓷球直径，样品直径，温度和保护气氛对SPC测试的影响。结果表明，上述六个因素中的五个（试样直径除外）对SPC试样的断裂时间，中心挠度，实际蠕变应变和蠕变损伤有很大影响。

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  • 来源
    《Materials Science and Engineering》 |2010年第11期|2784-2789|共6页
  • 作者

    Zhixiang Zhou; Yangyan Zheng; Xiang Ling; Ruomei Hu; Jianqiu Zhou;

  • 作者单位

    School of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 210009, China;

    School of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 210009, China;

    School of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 210009, China;

    School of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 210009, China;

    School of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 210009, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    small punch creep test; finite element model; creep damage; influence factor;

    机译：小冲头蠕变测试;有限元模型蠕变损伤影响因素;

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