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准静态条件下金属材料的临界断裂准则研究

于思淼 蔡力勋 姚迪 包陈 陈辉 彭云强 韩光照

于思淼, 蔡力勋, 姚迪, 包陈, 陈辉, 彭云强, 韩光照. 准静态条件下金属材料的临界断裂准则研究[J]. 力学学报, 2018, 50(5): 1063-1080. doi: 10.6052/0459-1879-18-172
引用本文: 于思淼, 蔡力勋, 姚迪, 包陈, 陈辉, 彭云强, 韩光照. 准静态条件下金属材料的临界断裂准则研究[J]. 力学学报, 2018, 50(5): 1063-1080. doi: 10.6052/0459-1879-18-172
Yu Simiao, Cai Lixun, Yao Di, Bao Chen, Chen Hui, Peng Yunqiang, Han Guangzhao. THE CRITICAL STRENGTH CRITERION OF METAL MATERIALS UNDER QUASI-STATIC LOADING[J]. Chinese Journal of Theoretical and Applied Mechanics, 2018, 50(5): 1063-1080. doi: 10.6052/0459-1879-18-172
Citation: Yu Simiao, Cai Lixun, Yao Di, Bao Chen, Chen Hui, Peng Yunqiang, Han Guangzhao. THE CRITICAL STRENGTH CRITERION OF METAL MATERIALS UNDER QUASI-STATIC LOADING[J]. Chinese Journal of Theoretical and Applied Mechanics, 2018, 50(5): 1063-1080. doi: 10.6052/0459-1879-18-172

准静态条件下金属材料的临界断裂准则研究

doi: 10.6052/0459-1879-18-172
基金项目: 1)国家自然科学基金资助项目(11472228).
详细信息
    作者简介:

    2)蔡力勋, 教授, 主要研究方向:断裂与疲劳、强度理论、材料测试理论与技术. E-mail: lix_cai@263.net

    通讯作者:

    蔡力勋

  • 中图分类号: O346;

THE CRITICAL STRENGTH CRITERION OF METAL MATERIALS UNDER QUASI-STATIC LOADING

  • 摘要: 本文针对9种金属材料完成了具有不同约束程度的10类试样的延性断裂试验, 获得了发生拉、压、扭和裂尖断裂等破坏形式构型试样的载荷-位移试验关系; 基于圆棒漏斗试样拉伸试验所得直至破坏的载荷-位移曲线, 采用有限元辅助试验(finite-element-analysis aided testing, FAT)方法得到了9种材料直至破坏的全程等效应力-应变曲线, 以此作为材料本构关系通过有限元分析获得了各类试样直至临界破坏的载荷-位移关系模拟. 载荷-位移关系模拟结果与试验结果有较好的一致性, 表明用于解决试样颈缩问题的FAT方法所获得的全程材料本构关系针对各向同性材料具有真实性和普适性. 对应9种材料、10类试样的36 个载荷-位移临界断裂点, 通过有限元分析获得了对应的材料临界断裂应力、应变与临界应力三轴度, 研究表明, 第一主应力在延性变形过程中为主控断裂的主导参量; 通过研究光滑、缺口、裂纹等构型试样的断裂状态, 提出了$-1$至3范围的应力三轴度下由第一主应力主控的统一塑性临界断裂准则.

     

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出版历程
  • 收稿日期:  2018-05-30
  • 刊出日期:  2018-09-18

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