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非常规态型近场动力学热黏塑性模型及其应用

王涵 黄丹 徐业鹏 刘一鸣

王涵, 黄丹, 徐业鹏, 刘一鸣. 非常规态型近场动力学热黏塑性模型及其应用[J]. 力学学报, 2018, 50(4): 810-819. doi: 10.6052/0459-1879-18-113
引用本文: 王涵, 黄丹, 徐业鹏, 刘一鸣. 非常规态型近场动力学热黏塑性模型及其应用[J]. 力学学报, 2018, 50(4): 810-819. doi: 10.6052/0459-1879-18-113
Wang Han, Huang Dan, Xu Yepeng, Liu Yiming. NON-ORDINARY STATE-BASED PERIDYNAMIC THERMAL-VISCOPLASTIC MODEL AND ITS APPLICATION[J]. Chinese Journal of Theoretical and Applied Mechanics, 2018, 50(4): 810-819. doi: 10.6052/0459-1879-18-113
Citation: Wang Han, Huang Dan, Xu Yepeng, Liu Yiming. NON-ORDINARY STATE-BASED PERIDYNAMIC THERMAL-VISCOPLASTIC MODEL AND ITS APPLICATION[J]. Chinese Journal of Theoretical and Applied Mechanics, 2018, 50(4): 810-819. doi: 10.6052/0459-1879-18-113

非常规态型近场动力学热黏塑性模型及其应用

doi: 10.6052/0459-1879-18-113
基金项目: 国家自然科学基金(51679077, 11132003), 中央高校基本科研业务费(2015B18314, 2017B13014)和NSFC-广东联合基金(第二期)超级计算科学应用研究专项(U1501501)资助项目.
详细信息
    作者简介:

    *黄丹, 教授, 主要研究方向: 计算固体力学. E-mail: danhuang@hhu.edu.cn

    通讯作者:

    黄丹

  • 中图分类号: O130.10;

NON-ORDINARY STATE-BASED PERIDYNAMIC THERMAL-VISCOPLASTIC MODEL AND ITS APPLICATION

  • 摘要: 在非常规态型近场动力学(non-ordinary state-based peridynamics, NOSB-PD) 理论框架下构建了考虑应变率效应、塑性硬化、热软化效应和材料断裂特征的非局部三维热黏塑性固体本构模型以及相应的非局部空间积分型数值算法, 并应用于金属类材料和构件在冲击载荷作用等工况下的高应变率热黏塑性变形与破坏分析. 通过对经典含初始裂纹Kalthoff-Winkler板冲击试验进行三维近场动力学模拟, 可得到裂纹的起裂角度、扩展路径、扩展速度以及裂纹扩展过程中靶板等效应力和温度分布, 所得结果与已有试验结果和其他数值方法结果吻合较好. 在此基础上, 应用该模型分析了不同冲击速度作用下金属靶板的变形与裂纹扩展过程, 结果表明: 该模型能较好地模拟不同冲击速度(应变率)情况下靶板的变形与破坏全过程. 随着冲击速度变化, 初始裂纹的起裂时间、扩展方向和扩展速度呈一定规律变化. 冲击速度越低, 起裂时间越晚(直至冲击速度低于某值时初始裂纹不扩展), 裂纹扩展速度峰值越低, 冲击过程中靶板温度峰值越低, 完全扩展所需时间越长.

     

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  • 刊出日期:  2018-07-18

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