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首页> 外文期刊>Journal of engineering materials and technology >The Use of Genetic Algorithms to Calibrate Johnson-Cook Strength and Failure Parameters of AISI/SAE 1018 Steel
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The Use of Genetic Algorithms to Calibrate Johnson-Cook Strength and Failure Parameters of AISI/SAE 1018 Steel

机译：遗传算法用于校正AISI / SAE 1018钢的Johnson-Cook强度和破坏参数

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摘要

Johnson-Cook (JC) strength and failure models have been widely used in finite element analysis (FEA) to solve a variety of thermo-mechanical problems. There are many techniques to determine the required JC parameters; however, a best practice to obtain the most reliable JC parameters has not yet been proposed. In this paper, a genetic-algorithm-based optimization strategy is proposed to calibrate the JC strength and failure model parameters of AISI/SAE 1018 steel. Experimental data were obtained from tensile tests performed for different specimen geometries at varying strain rates and temperatures. FEA was performed for each tensile test. A genetic algorithm was used to determine the optimum JC parameters that best fit the experimental force-displacement data. Calibrated JC parameters were implemented in FEA to simulate the impact tests of standard V-notch Charpy bars to verify the damage mechanism in the material. Considering good agreement of the experimental and FEA results, the current strategy is suggested for calibration proposes in other kind of materials in which plastic behavior could be represented by the JC strength and failure models.
机译：Johnson-Cook（JC）强度和破坏模型已广泛用于有限元分析（FEA）中，以解决各种热机械问题。有很多技术可以确定所需的JC参数；但是，尚未提出获得最可靠的JC参数的最佳实践。本文提出了一种基于遗传算法的优化策略，用于标定AISI / SAE 1018钢的JC强度和破坏模型参数。从在不同应变速率和温度下对不同样品几何形状进行的拉伸试验获得的实验数据。每次拉伸试验均进行有限元分析。使用遗传算法确定最适合实验力-位移数据的最佳JC参数。在FEA中实施了校准的JC参数，以模拟标准V形缺口夏比杆的冲击试验，以验证材料的损伤机理。考虑到实验结果和FEA结果的一致性，建议在其他类型的材料中提出建议的校准策略，在这些材料中，塑性行为可以用JC强度和破坏模型表示。

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  • 来源
    《Journal of engineering materials and technology》 |2019年第2期|021012.1-021012.12|共12页
  • 作者

    Buchely M. F.; Wang X.; Van Aken D. C.; OMalley R. J.; Lekakh S.; Chandrashekhara K.;

  • 作者单位

    Missouri Univ Sci & Technol, Dept Mat Sci & Engn, 1400 N Bishop,McNutt Hall, Rolla, MO 65409 USA;

    Missouri Univ Sci & Technol, Dept Mech & Aerosp Engn, 400 West 13th St,Toomey Hall, Rolla, MO 65409 USA;

    Missouri Univ Sci & Technol, Dept Mat Sci & Engn, 1400 N Bishop,McNutt Hall, Rolla, MO 65409 USA;

    Missouri Univ Sci & Technol, Dept Mat Sci & Engn, 1400 N Bishop,McNutt Hall, Rolla, MO 65409 USA;

    Missouri Univ Sci & Technol, Dept Mat Sci & Engn, 1400 N Bishop,McNutt Hall, Rolla, MO 65409 USA;

    Missouri Univ Sci & Technol, Dept Mech & Aerosp Engn, 400 West 13th St,Toomey Hall, Rolla, MO 65409 USA;

  • 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

    Johnson-Cook models; finite element modeling; genetic algorithms; AISI/SAE 1018 steel;

    机译：Johnson-Cook模型;有限元建模;遗传算法;AISI / SAE 1018钢;

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