| 孔挤压强化有限元分析及疲劳寿命估算 |
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| 引用本文： | 欧阳小穗. 孔挤压强化有限元分析及疲劳寿命估算[J]. 科学技术与工程, 2011, 11(12): 2787-2791 |
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| 作者姓名： | 欧阳小穗 |
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| 作者单位： | 上海交通大学航空航天学院,上海,200240 |
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| 摘 要： | 目前孔挤压强化过程仿真方面的文献主要是对于残余应力的分析,疲劳寿命主要由试验测量得到,对疲劳寿命的估算较少。通过三维非线性有限元方法,对7075铝合金芯棒和衬套挤压强化过程进行了仿真。分析了不同强化方法强化后的残余应力分布。在残余应力分析的基础上,估算了循环载荷下不强化、芯棒挤压和衬套挤压强化后元件的疲劳寿命;并与相应的试验数据进行了对比。结果表明,疲劳寿命估算结果与试验结果基本一致,估算方法可行。
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| 关 键 词： | 孔挤压强化 非线性有限元 残余应力 疲劳寿命 |
| 收稿时间： | 2011-01-17 |
| 修稿时间： | 2011-01-21 |
Finite element Analysis and fatigue life prediction of cold expansion |
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| OUYANG Xiaosui. Finite element Analysis and fatigue life prediction of cold expansion[J]. Science Technology and Engineering, 2011, 11(12): 2787-2791 |
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| Authors: | OUYANG Xiaosui |
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| Affiliation: | OUYANG Xiao-sui,ZHANG Xiao-jing,YANG Shu-xun(School of Aeronautics and Astronautics,Shanghai Jiaotong University,Shanghai 200240,P.R.China) |
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| Abstract: | The FE model of 7075 aluminum alloy was built based on 3-D nonlinear finite element method,which the mandrel cold expansion and split-sleeve expansion were applied to.The residual stress was calculated and fatigue life was predicted.Experiment was carried out on non-cold expansion,mandrel cold expansion and split-sleeve expansion to obtain the fatigue life improvement.Comparison between the result of experiment and the estimated result shows that they are fitting well,the prediction method is proved feasibl... |
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| Keywords: | cold expansion nonlinear finite element method residual stress fatigue life |
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