| 基于临界面法的剪切式多轴疲劳寿命预测模型 |
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| 引用本文： | 刘嘉, 李静, 张忠平. 基于临界面法的剪切式多轴疲劳寿命预测模型[J]. 固体力学学报, 2012, 33(1): 58-62. doi: 10.3969/j.issn.0254-7805.2012.01.009 |
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| 作者姓名： | 刘嘉 李静 张忠平 |
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| 作者单位： | 空军工程大学理学院,西安,710051; 空军工程大学理学院,西安,710051; 空军工程大学理学院,西安,710051 |
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| 基金项目： | 空军工程大学研究生科技创新计划(Dx2010403)资助 |
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| 摘 要： | 基于临界平面原理,应用von-Mises准则提出一种能够同时适用于比例与非比例加载的剪切式多轴疲劳损伤参量.新的损伤参量,通过引入一个应力相关因子来考虑临界面上最大剪应变范围和正应变范围对多轴疲劳损伤贡献的不同,同时该因子还考虑了非比例附加强化对材料多轴疲劳寿命的影响.该参量不含有经验常数,便于工程应用.经1045HR钢,S45C钢,Inconel718钢,16MnR钢等四种材料的多轴疲劳试验验证,预测结果与试验结果吻合较好.
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| 关 键 词： | 多轴疲劳 临界平面法 非比例附加强化 寿命预测 |
A MULTIAXIAL FATIGUE LIFE PREDICTION MODEL WITH SHEAR FORM BASED ON THE CRITICAL PLANE APPROACH |
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| Jia Liu, Jing Li, Zhongping Zhang. A MULTIAXIAL FATIGUE LIFE PREDICTION MODEL WITH SHEAR FORM BASED ON THE CRITICAL PLANE APPROACH[J]. Chinese Journal of Solid Mechanics, 2012, 33(1): 58-62. doi: 10.3969/j.issn.0254-7805.2012.01.009 |
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| Authors: | Jia Liu Jing Li Zhongping Zhang |
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| Affiliation: | Jia Liu Jing Li Zhongping Zhang (The Science Institute,Air Force Engineering University,Xi’an,710051) |
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| Abstract: | Based on the critical plane approach,a new multiaxial fatigue damage parameter with shear form is proposed by means of the von-Mises criterion.This proposed damage parameter is suitable for both proportional and non-proportional loading.Besides,this damage parameter considers the maximum shear strain range and the normal strain range on the critical plane.The effect of the non-proportional cyclic hardening on the fatigue life is taken into account by an introduced stress-correlated factor.It is convenient for engineering application because of no empirical constants in this parameter.The predicted multiaxial fatigue lives of the considered materials(1045HR Steel,S45C Steel,Inconel718 Steel and 16MnR Steel) using the proposed model are found in good agreement with the experimental results. |
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| Keywords: | multiaxial fatigue critical plane approach non-proportional cyclic hardening life prediction |
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