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浙江大学学报(工学版)  2017, Vol. 51 Issue (8): 1610-1618    DOI: 10.3785/j.issn.1008-973X.2017.08.017
机械与能源工程     
TC4板冷挤压强化寿命预测与试验验证
王幸1, 徐武1, 张晓晶1, 张丽娜2, 胡本润2
1. 上海交通大学 航空航天学院, 上海 200240;
2. 北京航空材料研究院, 北京 100095
Numerical prediction and experimental verification of fatigue life of TC4 plate strengthened by cold expansion
WANG Xing1, XU Wu1, ZHANG Xiao-jing1, ZHANG Li-na2, HU Ben-run2
1. School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai 200240, China;
2. Beijing Institute of Aeronautical Materials, Beijing 100095, China
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摘要:

针对缺乏孔挤压强化铰孔后的残余应力分布及寿命预测与评定的分析方法,研究孔挤压强化铰孔工艺的三维有限元模拟方法及挤压强化后铰孔对孔边的残余应力分布的影响.分析结果表明:铰"0"孔后挤入端的残余压应力比不铰孔的明显增大.通过有限元法获得铰孔试样在疲劳载荷作用下孔边的应力分布,结合临界距离法预测3组不同载荷水平下4%孔挤压量钛合金TC4中心孔板的疲劳寿命,预测结果在试验结果的0.5~2.0倍寿命之内.

Abstract:

There is still a lack of method for evaluating the residual stress and fatigue performance of cold expansion specimen with reaming process. Strategies for modelling the cold expansion with reaming process by using three-dimensional finite element method were extensively analyzed. The compressive residual stress at the entrance face is significantly increased by the reaming process. Stress distributions near the strengthened hole under three different fatigue loads were obtained by using elastic-plastic finite element analysis. The fatigue lives of titanium central hole plates with 4% expansion were predicted combined with the critical distance method. The ratio between the predictive and experimental results is within 0.5 to 2.

收稿日期: 2016-09-08 出版日期: 2017-08-16
CLC:  TG376.3  
通讯作者: 张晓晶,女,副教授.ORCID:0000-0003-0958-472X.     E-mail: zhangxj76@sjtu.edu.cn
作者简介: 王幸(1992-),男,硕士生,从事疲劳结构与断裂等研究.ORCID:0000-0002-6644-9228.E-mail:786235493@sjtu.edu.cn
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引用本文:

王幸, 徐武, 张晓晶, 张丽娜, 胡本润. TC4板冷挤压强化寿命预测与试验验证[J]. 浙江大学学报(工学版), 2017, 51(8): 1610-1618.

WANG Xing, XU Wu, ZHANG Xiao-jing, ZHANG Li-na, HU Ben-run. Numerical prediction and experimental verification of fatigue life of TC4 plate strengthened by cold expansion. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2017, 51(8): 1610-1618.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2017.08.017        http://www.zjujournals.com/eng/CN/Y2017/V51/I8/1610

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