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Numerical approach to the evaluation of forming limit curves for zircaloy-4 sheet

机译：Zircaloy-4板材成形极限曲线评估的数值方法

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摘要

The forming limit strains (FLSs) of zircaloy-4 sheets are studied. After having obtained the true stress-strain curve of zircaloy-4 using the weighted-average method, limit dome height (LDH) tests are performed to establish experimental FLSs. We summarize related theoretical forming limit curves (FLC) and discuss their limitations. Two finite element (FE) models are established for determining FLSs; an LDH test FE model for the negative minor strain sector, and a biaxial tensile FE model for the positive minor strain sector. The numerical FLSs are found to agree well with experimental data. Since the numerical FLC gives the strain at the onset of local thinning (whereas the experimental FLC provides the strain between local necking and ductile fracture), resulting FE FLS values are slightly lower than the experimental ones so that results can be regarded as conservative. Our FE approach substitutes the expensive and time-demanding experimental LDH tests.
机译：研究了Zircaloy-4板材的成形极限应变（FLS）。使用加权平均法获得Zircaloy-4的真实应力-应变曲线后，进行极限圆顶高度（LDH）测试以建立实验FLS。我们总结了相关的理论成形极限曲线（FLC）并讨论了它们的局限性。建立了两个用于确定FLS的有限元（FE）模型。负负应变扇区的LDH测试有限元模型，正负应变扇区的双轴拉伸有限元模型。发现数值FLS与实验数据非常吻合。由于数值FLC给出了局部变薄开始时的应变（而实验FLC提供了局部颈缩和韧性断裂之间的应变），因此所得的FE FLS值略低于实验值，因此可以认为结果是保守的。我们的有限元方法替代了昂贵且费时的LDH实验测试。

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  • 来源
    《Journal of Materials Research》 |2015年第21期|3277-3287|共11页
  • 作者

    Minsoo Kim; Felix Rickhey; Hyungyil Lee; Naksoo Kim;

  • 作者单位

    Department of Mechanical Engineering, Sogang University, Seoul 121-742, Korea;

    Department of Mechanical Engineering, Sogang University, Seoul 121-742, Korea;

    Department of Mechanical Engineering, Sogang University, Seoul 121-742, Korea;

    Department of Mechanical Engineering, Sogang University, Seoul 121-742, Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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