| 残余应力对高周疲劳性能的影响 |
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| 引用本文： | 何家文,胡奈赛.残余应力对高周疲劳性能的影响[J].西安交通大学学报,1992,26(3):25-32. |
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| 作者姓名： | 何家文 胡奈赛 |
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| 作者单位： | 西安交通大学金属材料及强度研究所
(何家文，胡奈赛)，西安交通大学金属材料及强度研究所(张定铨) |
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| 基金项目： | 国家自然科学基金重大项目 |
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| 摘 要： | 残余应力对光滑试样高周疲劳的作用,采用多轴应力的Dang-Van 图估算,有较好的线性关系;在裂纹体上作用的残余压应力可提高裂纹的闭合力,从而降低裂纹的扩展速率,甚至停止扩展;对于缺口试样,残余应力的集中和松弛对疲劳极限的作用较为显著。
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| 关 键 词： | 残余应力 疲劳 缺口 |
EFFECTS OF RESIDUAL STRESSES ON HIGH CYCLE FATIGUE |
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| He Jiawen,Hu Naisai,Zhang Dingquan Research Institute for Strength of Metals.EFFECTS OF RESIDUAL STRESSES ON HIGH CYCLE FATIGUE[J].Journal of Xi'an Jiaotong University,1992,26(3):25-32. |
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| Authors: | He Jiawen Hu Naisai Zhang Dingquan Research Institute for Strength of Metals |
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| Institution: | He Jiawen;Hu Naisai;Zhang Dingquan Research Institute for Strength of Metals |
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| Abstract: | The effect of esidual stress on high cycle fatigue for smooth specimen is better to be evaluated by
Dang-Van diagram,for which multiaxial stress state is emphasised.For the fatigue behavior of notch
bar,residual stress concentraction and relaxation in the notched area are vital to the fatigue limit.The
compressive residual sress in the cracked body acts as a closure force holding the crack from propaga-
tion.With the increase of compressive residual, stress,a crack may lower down its growth rate and
even stop cracking. |
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| Keywords: | residual stress fatigue notch |
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