| 带缺口圆试棒的韧性损伤细观力学分析 |
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| 引用本文： | 左建政,楼志文.带缺口圆试棒的韧性损伤细观力学分析[J].上海交通大学学报,1990(Z1). |
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| 作者姓名： | 左建政 楼志文 |
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| 作者单位： | 西安交通大学，西安交通大学 |
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| 摘 要： | 本文利用修正的 Gurson 塑性势和有限变形理论,建立了有限变形下韧性损伤的弹塑性有限元方程,并给出了一种孔洞体积分数率的演化模型.利用数值方法,详细地研究了缺口试棒的缺口曲率半径对其损伤分布和破坏形式以及应力三轴度的影响.
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| 关 键 词： | Gurson 塑性势 韧性损伤 应力三轴度 孔洞体积分数 |
An Analysis of Ductile Damage by Micromechanics for Notched Specimen |
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| Zuo Jianzheng Lou Zhiwen.An Analysis of Ductile Damage by Micromechanics for Notched Specimen[J].Journal of Shanghai Jiaotong University,1990(Z1). |
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| Authors: | Zuo Jianzheng Lou Zhiwen |
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| Institution: | Zuo Jianzheng Lou Zhiwen |
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| Abstract: | Elastoplastic finite element formulation of ductile damage under
finite deformation is established by means of the modified Gurson's plastic
potential theory.An evolutionary model of void volume fraction is also
suggested.By using the numerical mathod,the effects of the curvature radius
of the notched specimen on damage distribution,as well as the rupture form
and stress triaxiality are researched in detail. |
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| Keywords: | Gurson's plastic potential ductile damage stress triaxiality void volume fraction |
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