| 裂纹尖端区的应变和三轴应力 |
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| 引用本文： | 田常录.裂纹尖端区的应变和三轴应力[J].船舶力学,2004,8(3):70-75. |
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| 作者姓名： | 田常录 |
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| 作者单位： | 中国船舶科学研究中心,江苏,无锡,210082 |
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| 摘 要： | 鉴于全塑性解存在的问题,Tian and Gao(2004y1]导出能反映弹性应变的弹塑性裂纹尖端场.本文给出了其三轴应力和应变分布,并给出了相应的有限元数值解.分析表明,高三轴应力引起的高弹性体变形和弹性能是诱发裂纹扩展的主要因素.
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| 关 键 词： | 弹性应变 三轴应力 弹塑性裂纹尖端场 |
Strain and stress triaxiality at a crack tip |
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| TIANChang-lu.Strain and stress triaxiality at a crack tip[J].Journal of Ship Mechanics,2004,8(3):70-75. |
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| Authors: | TIANChang-lu |
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| Institution: | ChinaShipScientificResearchCenter,Wuxi214082,China |
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| Abstract: | In view of the limitation of full plastic fields,the near tip triaxiality and detail elastic,plastic strain distributions derived from the analogy elastic plastic field (Tian and Gao, 2004) as well as FEM results of two kinds of specimens are presented.Both the analytical and numerical analyses indicate that the high triaxiality induces high volume deformation,and the elastic energy related to the volume deformation plays an important role in elastic plastic fracture process. |
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| Keywords: | elastic strain triaxiality elastic plastic near-tip field |
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