预变形2219铝合金应力松弛时效成形统一本构建模及回弹预测（英文）
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摘要
通过应力松弛时效实验和有限元仿真研究预变形2219铝合金应力松弛行为。结果表明:应力能促进时效析出进程,缩短到达峰值强度的时间。且初始应力越大,时效后的剩余应力越高,合金的屈服强度越大。基于显微组织演变和时效强化理论建立统一本构模型,并通过子程序开发将其嵌入有限元仿真模型中。发现仿真回弹后的半径与实验值间的相对误差为3.6%,回弹为16.8%。从而可知,所建立的应力松弛时效本构模型能较好预测带筋壁板时效过程中的回弹行为。
Stress relaxation ageing behavior of pre-deformed AA2219 is studied through stress relaxation age experiments and finite element(FE) simulation. The results show that the stress can promote the process of ageing precipitation, and shorten the time to reach the peak strength. Meanwhile,the residual stress and yield strength increase along with the increase in the initial stress. Based on microstructure evolution and ageing strengthening theory,a unified constitutive model is established and incorporated into the FE simulation model through a user subroutine. It is found that the relative error of the radius is 3.6% compared with the experimental result and the springback is 16.8%. This indicates that the proposed stress relaxation ageing constitutive model provides a good prediction on the springback of such stiffened panel during its ageing process.
Stress relaxation ageing behavior of pre-deformed AA2219 is studied through stress relaxation age experiments and finite element(FE) simulation. The results show that the stress can promote the process of ageing precipitation, and shorten the time to reach the peak strength. Meanwhile,the residual stress and yield strength increase along with the increase in the initial stress. Based on microstructure evolution and ageing strengthening theory,a unified constitutive model is established and incorporated into the FE simulation model through a user subroutine. It is found that the relative error of the radius is 3.6% compared with the experimental result and the springback is 16.8%. This indicates that the proposed stress relaxation ageing constitutive model provides a good prediction on the springback of such stiffened panel during its ageing process.
引文
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[16]LIU G,ZHANG G J,DING X D,SUN J,CHEN K H.Modeling the strengthening response to aging process of heat-treatable aluminum alloys containing plate/disc-or rod/needle-shaped precipitates[J].Materials Science and Engineering A,2003,344:113-124.
[17]QUAN Li-wei,FANG Da-ran.Role of elastic stress on the precipitate in Al-Cu alloy and the corresponding modeling[J].Rare Metal Materials and Engineering,2016,45(12):3245-3249.(in Chinese)
[18]ZHANG Jin,DENG Yun-lai,ZHANG Xin-ming.Constitutive modeling for creep age forming of heat-treatable strengthening aluminum alloys containing plate or rod shaped precipitates[J].Materials Science and Engineering A,2013,563:8-15.
[19]MOORE K T,HOWE J M.Characterization ofγplate-shaped precipitates in an Al-4.2at.%Ag alloy-Growth kinetics,solute field,composition and modeling[J].Acta Materialia,2000,48(16):4083-4098.
[20]XU Fu-shun,ZHANG Jin,DEGN Yun-lai,ZHANG Xin-ming.Precipitation orientation effect of 2124 aluminum alloy in creep aging[J].Transactions of Nonferrous Metals Society of China,2014,24:2067-2071.
[21]NIE J F.Effects of precipitate shape and orientation on dispersion strengthening in magnesium alloys[J].Scripta Materialia,2003,48:1009-1015.
[22]YE Yi,YIN Chen-bo,GONG Yue,ZHOU Jun-jing.Position control of nonlinear hydraulic system using an improved PSO based PIDcontroller[J].Mechanical Systems and Signal Processing,2017,83:241-259.
[2]XU Fu-shun,ZHANG Jin,DENG Yun-lai,ZHANG Xin-ming.Effect of pre-stretching on synchronization of shape and property in creep age forming of 2124 aluminum alloy[J].The Chinese Journal of Nonferrous Metals,2017,27(1):1-7.(in Chinese)
[3]ZHANG Jin,DENG Yun-lai,LI Si-yu,CHEN Ze-yu,ZHANGXin-ming.Creep age forming of 2124 aluminum alloy with single/double curvature[J].Transactions of Nonferrous Metals Society of China,2013,23:1922-1929.
[4]ZHAN Li-hua,ZHANG Jiao,JIA Shu-feng.Strength evolution rule and its model for stress ageing of 2219 aluminum alloy[J].Journal of Central South University(Science and Technology),2016,47(7):2235-2241.(in Chinese)
[5]QUAN Li-wei,ZHAO Gang,TIAN Ni,HUANG Ming-li.Effect of stress on microstructures of creep-aged 2524 alloy[J].Transactions of Nonferrous Metals Society of China,2013,23:2209-2214.
[6]YANG You-liang,ZHAN Li-hua,LI Jie.Constitutive modeling and springback simulation for 2524 aluminum alloy in creep age forming[J].Transactions of Nonferrous Metals Society of China,2015,25:3048-3055.
[7]LI Yong,SHI Zhu-sheng,LIN Jian-guo,YANG Y L,RONG Qi,HUANG B M,CHUNG T F,TSAO C S,YANG J R,BALINT D S.A unified constitutive model for asymmetric tension and compression creep-ageing behaviour of naturally aged Al-Cu-Li alloy[J].International Journal of Plasticity,2017,89:130-149.
[8]LI Yong,SHI Zhu-sheng,LIN Jian-guo,YANG Y L,SAILLARD P,SAID R.FE simulation of asymmetric creep-ageing behaviour of AA2050 and its application to creep age forming[J].International Journal of Mechanical Sciences,2018,140:228-240.
[9]MA Zi-yao,ZHAN Li-hua,LIU Chun-hui,XU Ling-zhi,XUYong-qian,MA Pei-pei,Li Jian-jun.Stress-level-dependency and bimodal precipitation behaviors during creep ageing of Al-Cu alloy:Experiments and modeling[J].International Journal of Plasticity,2018,110:183-201.
[10]HO K C,LIN J,DEAN T A.Constitutive modelling of primary creep for age forming an aluminium alloy[J].Journal of Materials Processing Tech,2004,153-154(1):122-127.
[11]IDEM K,PEDDIESON J.Simulation of the age forming process[J].Journal of Manufacturing Science and Engineering,2005,127(1):165-172.
[12]ZHAN Li-hua,MA Zi-yao,ZHANG Jiao,TAN Jing-sheng,YANGZhan,LI Heng.Stress relaxation ageing behaviour and constitutive modelling of a 2219 aluminium alloy under the effect of an electric pulse[J].Journal of Alloys and Compounds,2016,679:316-323.
[13]ZHENG Jing-hua,LIN Jian-guo,LEE J,PAN Ran,LI Chen,DAVIES C M.A novel constitutive model for multi-step stress relaxation ageing of a pre-strained 7xxx series alloy[J].International Journal of Plasticity,2018,106:31-47.
[14]YANG You-liang,ZHAN Li-hua,SHEN Ru-lin,LIU Jian,LI Xi-cai,HUANG Ming-hui,HE Di-qiu,CHANG Zhi-long,MA Yun-long,WAN Li.Investigation on the creep-age forming of an integrally-stiffened AA2219 alloy plate:Experiment and modeling[J].International Journal of Advanced Manufacturing Technology,2018,95:2015-2025.
[15]GRONG F,MYHR O R.Additivity and isokinetic behaviour in relation to diffusion controlled growth[J].Acta Materialia,2000,48:445-452.
[16]LIU G,ZHANG G J,DING X D,SUN J,CHEN K H.Modeling the strengthening response to aging process of heat-treatable aluminum alloys containing plate/disc-or rod/needle-shaped precipitates[J].Materials Science and Engineering A,2003,344:113-124.
[17]QUAN Li-wei,FANG Da-ran.Role of elastic stress on the precipitate in Al-Cu alloy and the corresponding modeling[J].Rare Metal Materials and Engineering,2016,45(12):3245-3249.(in Chinese)
[18]ZHANG Jin,DENG Yun-lai,ZHANG Xin-ming.Constitutive modeling for creep age forming of heat-treatable strengthening aluminum alloys containing plate or rod shaped precipitates[J].Materials Science and Engineering A,2013,563:8-15.
[19]MOORE K T,HOWE J M.Characterization ofγplate-shaped precipitates in an Al-4.2at.%Ag alloy-Growth kinetics,solute field,composition and modeling[J].Acta Materialia,2000,48(16):4083-4098.
[20]XU Fu-shun,ZHANG Jin,DEGN Yun-lai,ZHANG Xin-ming.Precipitation orientation effect of 2124 aluminum alloy in creep aging[J].Transactions of Nonferrous Metals Society of China,2014,24:2067-2071.
[21]NIE J F.Effects of precipitate shape and orientation on dispersion strengthening in magnesium alloys[J].Scripta Materialia,2003,48:1009-1015.
[22]YE Yi,YIN Chen-bo,GONG Yue,ZHOU Jun-jing.Position control of nonlinear hydraulic system using an improved PSO based PIDcontroller[J].Mechanical Systems and Signal Processing,2017,83:241-259.