FEM simulation for residual stress in quenched aeronautics aluminum alloy thick-plate based on rolled residual stresses distribution
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摘要: 利用高度非线性软件MSC.Marc,采用弹塑性大变形有限元法对7075铝合金预拉伸厚板在轧制、淬火过程中残余应力的分布进行数值仿真.文中顺次地仿真出轧制-升温-保温-急冷四个过程中产生的残余应力,研究轧制残余应力、升温-保温应力对最终淬火应力的影响.结果表明小压缩量下,整体轧制应力小于淬火应力,轧制应力在升温-保温过程中减小,在急冷过程中急剧增大,最终表现为淬火应力.轧制应力对淬火应力影响很小,淬火应力却彻底改变了原有轧制应力的大小和分布.Abstract: The residual stresses of 7075 aluminum alloy thick-plate in the process of rolling and quenching was simulated by using highly non-liner software MSC.Marc and elas-plastic large deformation FEM methods. In addition, the residual stresses of rolling, temperature rising-preservation-falling were simulated respectively, and the influence of rolling stress and temperature rising-preservation stress towards quenching stress were studied too. The result shows that in small reduction case, the whole rolling stress is smaller than quenching stress; the rolling stress decreases when temperature rising-preservation and increases rapidly when quenching, the last stress remained is quenching stress. The influence of rolling stress towards quenching stress is little, but quenching stress totally changes the original rolling stress.
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Key words:
- residual stresses /
- cold rolling /
- quenching /
- heat treatment /
- plastic deformation
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[1] 米谷茂. 残余应力的产生和对策[M] 北京:机械工业出版社,1983.24~27 Mi Gumao. The produce and countermeasure of residual stress [M] Beijing:China Machine Press, 1983.24~27(in Chinese) [2] 赵丽丽,张以都.预拉伸板机制-拉伸残余应力的计算机仿真[J] 京航空航天大学学报,2004,30(7):606~609 Zhao Lily, Zhang Yidu. Computer simulation of residual stress for cold rolling prestretching board[J] Journal of Beijing University of Aeronautics and Astronautics,2004,30(7):606~609(in Chinese) [3] Adluri, Seshu Madhava Rao. Residual stresses and initial out-of -straightness of hot-rolled steel angles. In:Proceeding Annual Technocal Session, Structural Stability Research Council Kansas City. Kansas City, 1995.115~126 [4] 刘 庄,吴肇基,吴景之,等.热处理过程数值模拟[M] 京:科学出版社,1996.116~131 Liu Zhuang, Wu Zhaoji, Wu Jingzhi, et al. FEM simulation of heat treatment. Beijing:Science Press,1996.116~131(in Chinese) [5] 顾剑峰,潘键生,胡明娟.淬火过程的计算机模拟及其应用[J] 属热处理,2002,5:35~44 Gu Jianfeng, Pan Jiansheng, Hu Mingjuan. Computer simulation of quenching process and its application[J] Metal Heat Treatment, 2000,5:35~44(in Chinese) -
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