| 孔挤压强化残余应力场的三维有限元模拟和实验研究 |
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| 引用本文： | 刘晓龙,高玉魁,刘蕴韬,陈东风.孔挤压强化残余应力场的三维有限元模拟和实验研究[J].航空材料学报,2011,31(2):24-27. |
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| 作者姓名： | 刘晓龙 高玉魁 刘蕴韬 陈东风 |
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| 作者单位： | 1. 中国原子能科学研究院,北京,102413
2. 北京航空材料研究院,北京,100095 |
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| 基金项目： | 973项目(2010CB833105); 863项目(2009AA03Z535) |
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| 摘 要： | 运用有限元软件ANSYS建立了孔挤压强化残余应力场的三维有限元模型,模拟计算了不同厚度7050-T7451铝合金构件孔挤压强化的三维残余应力场分布.模拟结果表明,孔边残余应力沿厚度方向呈梯度分布,人口残余压应力最小,是易于产生裂纹的部位;入口残余压应力随构件厚度增加而增大,达到最大值后,随厚度增加而减小并逐渐趋于稳定值...
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| 关 键 词： | 孔挤压强化 残余应力场 有限元 X射线衍射分析 |
3D Finite Element Simulation and Experimental Test on Residual Stress Field by Hole Cold Expansion |
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| LIU Xiao-long,GAO Yu-kui,LIU Yun-tao,CHEN Dong-feng.3D Finite Element Simulation and Experimental Test on Residual Stress Field by Hole Cold Expansion[J].Journal of Aeronautical Materials,2011,31(2):24-27. |
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| Authors: | LIU Xiao-long GAO Yu-kui LIU Yun-tao CHEN Dong-feng |
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| Institution: | LIU Xiao-long1,GAO Yu-kui2,LIU Yun-tao1,CHEN Dong-feng1(1.China Institute of Atomic Energy,Beijing 102413,China,2.Beijing Institute of Aeronautical Materials,Beijing 100095,China) |
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| Abstract: | The residual stress field of 7050-T7451 aluminum alloy with different thickness caused by hole cold expansion was simulated by FEM using ANSYS codes.The results show that the residual compressive stress of the hole edge exists grades across the thickness and the residual compressive value is smallest at the entrance,so the entrance becomes the most weakest region.With the increment of the thickness,the residual compressive stress at the entrance increases until reaching the maximum,then decreases and gradua... |
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| Keywords: | hole cold expansion residual stress fields finite element X-ray diffraction |
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