| 新的多轴循环加载应变路径非比例度的定义 |
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| 引用本文： | 何国求,陈成澍,严彪,唐人剑.新的多轴循环加载应变路径非比例度的定义[J].同济大学学报(自然科学版),2002,30(12):1498-1502. |
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| 作者姓名： | 何国求 陈成澍 严彪 唐人剑 |
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| 作者单位： | 同济大学,材料科学与工程学院,上海市金属功能材料开发与应用重点实验室,上海,200092 |
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| 基金项目： | 国家自然科学基金资助项目( 589710 68，595710 35) |
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| 摘 要： | 基于对316L不锈钢多轴非比例循环加载低周疲劳微结构的研究结果，测量了位错自由运动间距，分析了位错自由运动间距的分布规律，给出了位错自由运动间距统计平均值与宏观等效饱和应力幅值之间的关系，以位错自由运动间距统计平均值给出了应变路径非比例度的定义，在单轴循环应力-应变关系式中引入新的非比例度的定义可以较好地描述多轴非比例循环应力-应变行为。
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| 关 键 词： | 多轴循环加载 应变路径 非比例度 非比例加载 材料 |
| 文章编号： | 0253-374X(2002)12-1498-05 |
| 修稿时间： | 2002年5月8日 |
Definition of Non-proportionality of Strain Path under Multi-axial Cyclic Loading |
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| HE Guo-qiu,CHEN Cheng-shu,YAN Biao,TANG Ren-jian.Definition of Non-proportionality of Strain Path under Multi-axial Cyclic Loading[J].Journal of Tongji University(Natural Science),2002,30(12):1498-1502. |
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| Authors: | HE Guo-qiu CHEN Cheng-shu YAN Biao TANG Ren-jian |
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| Abstract: | Based on the micro-structural investigation of low cycle fatigue under multi-axial non-proportional loading of 316L stainless steel,the distance within which dislocations move freely was measured,whose rule was analyzed at the same time.The quantitative relation between macroscopic effective saturated stress and the statistical mean distance within which dislocations move freely is given in this paper.The new definition of non-proportionality of loading path is given on the basis of the statistical mean distance within which dislocations move freely.The new non-proportionality defined in this paper is considered as entering uni-axial cyclic constitutive equation,which can be applied to describe the stress and strain behavior under multiaxial loading. |
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| Keywords: | non-proportional loading strain path non-proportionality |
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