| 材料性质和试样几何形状对应力三维度的影响 |
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| 引用本文： | 司马爱平,李余德. 材料性质和试样几何形状对应力三维度的影响[J]. 计算机辅助工程, 2009, 18(3): 16-22 |
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| 作者姓名： | 司马爱平 李余德 |
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| 作者单位： | 上海交通大学,船舶海洋与建筑工程学院,上海,200240;山东省电力勘测设计院,济南,250000;中国国电集团公司,滦河发电厂,河北,承德,067002 |
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| 摘 要： | 为研究应力三维度和塑性应变对金属材料微孔聚合型损伤发展和延性断裂过程的影响,用有限元法计算16Mn钢和两种铝合金材料不同缺口根半径拉伸试样的应力、应变分布. 结果表明:缺口根半径越小,最小横截面上周向和径向应变相差越大且越不均匀,并导致最小横截面上的应力三维度与Bridgman公式预测结果不一样. 材料性质和试样几何形状对应力三维度的影响很大:缺口根半径相同的3种材料试样最小横截面的应力三维度分布形态相似,但应力三维度峰值及其所处位置有所不同;同种材料的试样缺口根半径不同,应力三维度分布形态也不同.
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| 关 键 词： | 应力三维度 材料性质 试样几何形状 缺口根半径 Bridgman公式 有限元 |
| 收稿时间： | 2009-02-20 |
| 修稿时间： | 2009-04-16 |
Influence of material properties and specimen geometry on stress triaxiality |
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| Simaaiping and LI Yude. Influence of material properties and specimen geometry on stress triaxiality[J]. Computer Aided Engineering, 2009, 18(3): 16-22 |
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| Authors: | Simaaiping and LI Yude |
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| Affiliation: | School of Naval Architecture, Ocean and Civil Eng. , Shanghai Jiaotong Univ.,School of Naval Architecture, Ocean and Civil Eng. , Shanghai Jiaotong Univ. |
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| Abstract: | To study the influence of stress triaxiality and plastic strain on the microvoid coalescence damage development and ductile fracture process of metal materials,the stress and strain distributions of the tensile specimens with different notch root radius are calculated by finite element method for 16Mn steel and two kinds of aluminum alloys. To the smallest cross-section,the results show that the smaller notch root radius leads to the larger difference between the circumferential strain and the radial strain... |
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| Keywords: | stress triaxiality material property specimen geometry shape notch root radius Bridgman equation finite element |
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