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首页> 外文期刊>Journal of Materials Research >Numerical study of the notch effect on the malleability of bulk metallic glasses based on the free-volume theory
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Numerical study of the notch effect on the malleability of bulk metallic glasses based on the free-volume theory

机译：基于自由体积理论的缺口对大块金属玻璃延展性影响的数值研究

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摘要

In this paper, numerical study was systematically conducted to analyze the shear banding evolution in bulk metallic glasses (BMGs) with various notches subjected to the uniaxial compression, and the relation between the notched configurations and compressive malleability was therefore elucidated. Free volume was used to be an internal state variable to depict the shear banding nucleation, growth and coalescence in the BMGs with the aid of free volume theory, which was incorporated into ABAQUS finite element method code as a user material subroutine. The present numerical procedure was firstly verified by comparing with the existing experimental data, and then parameter analysis was performed to discuss the impacts of notch shape, notch size, notch orientation, and notch configuration on the plastic deformability of notched samples. The present modeling will shed some light on the failure mechanisms and the toughening design of notched BMG structures in the engineering applications.
机译：在本文中，系统地进行了数值研究，以分析在具有单向压缩的各种缺口的块状金属玻璃（BMG）中的剪切带演化，从而阐明了缺口形态与压缩延展性之间的关系。借助自由体积理论，自由体积被用作内部状态变量来描述BMG中剪切带的形核，生长和聚结，该理论作为用户材料子例程并入ABAQUS有限元方法代码中。首先通过与现有实验数据进行比较，验证了目前的数值程序，然后进行了参数分析，讨论了缺口形状，缺口尺寸，缺口取向和缺口构型对缺口样品塑性变形的影响。当前的建模将为工程应用中的缺口BMG结构的失效机理和加固设计提供一些启示。

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  • 来源
    《Journal of Materials Research》 |2016年第6期|765-774|共10页
  • 作者

    Yunpeng Jiang;

  • 作者单位

    College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
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