| 关于Neuber应力集中公式的研究 |
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| 引用本文： | 董亚民,靳征谟,余寿文.关于Neuber应力集中公式的研究[J].清华大学学报(自然科学版),1987(5). |
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| 作者姓名： | 董亚民 靳征谟 余寿文 |
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| 作者单位： | 工程力学研究所
(董亚民，靳征谟)，工程力学研究所(余寿文) |
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| 摘 要： | Ｎｅｕｂｅｒ Ｈ．曾对反平面剪切荷载的等直体在任意非线性应力应变关系下的应力集中行为进行了研究，建立了相应的应力集中公式Ｋσ Ｋ■ ＝Ｋｔ２．其后，Ｎｅｗｍａｎ未加证明地将上述公式推广到合裂纹体的单轴受力断裂分析中，本文就 Ｎｅｕｂｅｒ的应力集中公式应用于平面受力情形的可靠性．进行了探讨。发现：Ｎｅｕｂｅｒ在反平面受力下推导出的弹塑性应力集中公式，没有能在平面受力下得到证实。对某些应力水平．ＫＫ值明显地偏离Ｎｅｕｂｅｒ公式
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| 关 键 词： | 应力集中系数 摄动法 失效应力 塑性应变 |
Investigation on the Neuber's Stress Concentration Formula |
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| Dong Yamin,Jin Zhengmo,Yu Shouwen.Investigation on the Neuber''''s Stress Concentration Formula[J].Journal of Tsinghua University(Science and Technology),1987(5). |
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| Authors: | Dong Yamin Jin Zhengmo Yu Shouwen |
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| Institution: | Department of Engineering Mechanics |
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| Abstract: | In this paper the problem of elasto-plastic stress concentration for elastoplastic deformation is investigated by perturbation method. Comparing the results of finite element analysis by authors and the others experimental results, the value of (K K )/K with respect to stress level in the whole range of elasto-plasticity is obtained and it is found that the Neuber's stress concentration formula can not be varified under plane stress state. Furthermore, to pay attention to above mentioned difference, Neuber's formula still may be approximately accepted, if the above mentioned difference is considered. |
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| Keywords: | stress concentration factor perturbation method failure stress plastic strain |
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