6082-T6高强铝合金材料本构模型试验研究
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摘要
铝合金材料本构关系是铝合金结构分析和应用的基本问题之一,针对国产高强新牌号铝合金6082-T6的材料本构模型进行研究。对取自3种截面形式结构用6082-T6高强铝合金型材的90个材性试样进行了拉伸试验,统计规定非比例延伸强度、抗拉强度、弹性模量、断裂伸长率、泊松比等材料力学参数。分析Ramberg-Osgood本构模型中硬化指数n的各种计算方法,提出采用快速退火算法(fast simulated annealing,FSA)求解n的方法并且编制计算程序,从而获得n的置信区间,所得结果比传统两点法更稳定。在此基础上得到了国产6082-T6高强铝合金材料本构模型,与试验实测应力-应变曲线的比较表明,提出的本构模型具有很好的预测性,可为铝合金结构的工程应用提供参考。
Material constitutive relationship is one of the basic problems for analysis and application of aluminum alloy structures.This paper systematically studied the material constitutive model of the domestic high-strength new grade aluminum alloy 6082-T6.Tensile testing was conducted for a total of 90 coupons that were cut from three cross-section shapes of the aluminum alloy 6082-T6.The measurement and statistical analysis of mechanical parameters were carried out,including non-proportional extension strengths,tensile strength,elastic modulus,breaking elongation,Poisson's ratio,etc.Various methods for calculating hardening exponent n in the Ramberg-Osgood law were discussed.The fast simulated annealing(FSA) method for calculating n was proposed and the FSA code was written to obtain the confidence interval of n.Comparison of results between FSA and other methods indicates that the FSA can provide more stable results than the traditional two-point method.On this basis,the material constitutive model of the 6082-T6 aluminum alloy was obtained.The comparison of this model and the tested stress-strain curve demonstrates that the constitutive model has good accuracy and can be applied to the engineering applications of aluminum structures.
Material constitutive relationship is one of the basic problems for analysis and application of aluminum alloy structures.This paper systematically studied the material constitutive model of the domestic high-strength new grade aluminum alloy 6082-T6.Tensile testing was conducted for a total of 90 coupons that were cut from three cross-section shapes of the aluminum alloy 6082-T6.The measurement and statistical analysis of mechanical parameters were carried out,including non-proportional extension strengths,tensile strength,elastic modulus,breaking elongation,Poisson's ratio,etc.Various methods for calculating hardening exponent n in the Ramberg-Osgood law were discussed.The fast simulated annealing(FSA) method for calculating n was proposed and the FSA code was written to obtain the confidence interval of n.Comparison of results between FSA and other methods indicates that the FSA can provide more stable results than the traditional two-point method.On this basis,the material constitutive model of the 6082-T6 aluminum alloy was obtained.The comparison of this model and the tested stress-strain curve demonstrates that the constitutive model has good accuracy and can be applied to the engineering applications of aluminum structures.
引文
[1]Mazzolani F M.Aluminium alloy structures[M].2nded.London,England:Chapman&HallLondon,1995:1.
[2]BS EN 1999-1-1 Design of aluminium structures[S].Brussels,Belgium:CEN,1997.
[3]张铮.铝合金结构压弯构件稳定承载力研究[D].上海:同济大学,2006.(Zhang Zheng.Study onsatbility capacity of aluminium beam-columns[D].Shanghai:Tongji University,2006.(in Chinese))
[4]郭小农.铝合金结构构件理论和试验研究[D].上海:同济大学,2006.(Guo Xiaonong.Theoretical andexperimental research on the aluminum alloy structuremembers[D].Shanghai:Tongji University,2006.(inChinese))
[5]沈祖炎,郭小农,李元齐.铝合金结构研究现状简述[J].建筑结构学报,2007,28(6):100-109.(SHEN Zuyan,GUO Xiaonong,LI Yuanqi.State-of-the-arts of research on aluminum alloy structures[J].Journal of Building Structures,2007,28(6):100-109.(in Chinese))
[6]周晓峰,张良兰,胡佳轶,等.辰山植物园温室铝合金结构设计[J].工业建筑,2011,41(11):30-35.(Zhou Xiaofeng,Zhang Lianglan,Hu Jiayi,et al.Structure design of Shanghai Chenshan BotanicalGarden Greenhouses[J].Industrial Construction,2011,41(11):30-35.(in Chinese))
[7]李征.大跨度铝合金网壳结构的应用[J].工程设计与建设,2005,37(3):14-17,39.(Li Zheng.Application of aluminum alloy latticed shell structurewith large span[J].Engineering Design andConstruction,2005,37(3):14-17,39.(in Chinese))
[8]GB/T50429—2007铝合金结构设计规范[S].北京:中国计划出版社,2007.(GB/T50429—2007Code for design of aluminium structures[S].Beijing:China Planning Press,2007.(in Chinese))
[9]GB/T228—2002金属材料:室温拉伸试验方法[S].北京:中国标准出版社,2002.(GB/T228—2002 Metallic materials:tensile testing ambienttemperature[S].Beijing:China Standards Press,2002.(in Chinese))
[10]GB/T228.1—2010金属材料拉伸试验:第1部分:室温试验方法[S].北京:中国标准出版社,2011.(GB/T 228.1—2010 Metallic materials:tensile testing:part 1:Method of test at roomtemperature[S].Beijing:China Standards Press,2011.(in Chinese))
[11]Demartino A,Landolfo R,Mazzolani F M.The use ofthe Ramberg-Osgood law for materials of round-housetype[J].Materials and Structures,1990,23:59-67.
[12]Ramberg W,Osgood W R.Description of stress-straincurves by three parameters[R].Washington DC:NACA TN-902,1943.
[13]郭小农,沈祖炎,李元齐,等.国产结构用铝合金材料本构关系及物理力学性能研究[J].建筑结构学报,2007,28(6):110-117.(GUO Xiaonong,SHENZuyan,LI Yuanqi,et al.Stress-strain relationship andphysical-mechanical properties of domestic structuralaluminum alloy[J].Journal of Building Structures,2007,28(6):110-117.(in Chinese))
[14]孙训方,方孝淑,关来泰.材料力学:上册[M].4版.北京:高等教育出版社,2002:25-26.
[15]Shapiro S S,Wilk M B.An analysis of variance test fornormality:complete samples[J].Biometrika,1965,52(3/4):591-611.
[16]刘江.幂函数非线性化直接拟合方法[J].华北地震科学,1984,2(4):100-102.
[17]Szu H,Hartley R.Fast simulated annealing[J].Physics Letters A,1987,122(34):157-162.
[18]Ryden N,Park C B.Fast simulated annealing inversionof surface waves on pavement using phase-velocityspectra[J].Geophysics,2006,71(4):R49-R58.
[19]Steinhardt O.Aluminum constructions in civilengineering[J].Aluminum,1971,47:131-139.
[20]盛骤,谢式千,潘承毅.概率论与数理统计[M].4版.北京:高等教育出版社,2008:198-201.
[2]BS EN 1999-1-1 Design of aluminium structures[S].Brussels,Belgium:CEN,1997.
[3]张铮.铝合金结构压弯构件稳定承载力研究[D].上海:同济大学,2006.(Zhang Zheng.Study onsatbility capacity of aluminium beam-columns[D].Shanghai:Tongji University,2006.(in Chinese))
[4]郭小农.铝合金结构构件理论和试验研究[D].上海:同济大学,2006.(Guo Xiaonong.Theoretical andexperimental research on the aluminum alloy structuremembers[D].Shanghai:Tongji University,2006.(inChinese))
[5]沈祖炎,郭小农,李元齐.铝合金结构研究现状简述[J].建筑结构学报,2007,28(6):100-109.(SHEN Zuyan,GUO Xiaonong,LI Yuanqi.State-of-the-arts of research on aluminum alloy structures[J].Journal of Building Structures,2007,28(6):100-109.(in Chinese))
[6]周晓峰,张良兰,胡佳轶,等.辰山植物园温室铝合金结构设计[J].工业建筑,2011,41(11):30-35.(Zhou Xiaofeng,Zhang Lianglan,Hu Jiayi,et al.Structure design of Shanghai Chenshan BotanicalGarden Greenhouses[J].Industrial Construction,2011,41(11):30-35.(in Chinese))
[7]李征.大跨度铝合金网壳结构的应用[J].工程设计与建设,2005,37(3):14-17,39.(Li Zheng.Application of aluminum alloy latticed shell structurewith large span[J].Engineering Design andConstruction,2005,37(3):14-17,39.(in Chinese))
[8]GB/T50429—2007铝合金结构设计规范[S].北京:中国计划出版社,2007.(GB/T50429—2007Code for design of aluminium structures[S].Beijing:China Planning Press,2007.(in Chinese))
[9]GB/T228—2002金属材料:室温拉伸试验方法[S].北京:中国标准出版社,2002.(GB/T228—2002 Metallic materials:tensile testing ambienttemperature[S].Beijing:China Standards Press,2002.(in Chinese))
[10]GB/T228.1—2010金属材料拉伸试验:第1部分:室温试验方法[S].北京:中国标准出版社,2011.(GB/T 228.1—2010 Metallic materials:tensile testing:part 1:Method of test at roomtemperature[S].Beijing:China Standards Press,2011.(in Chinese))
[11]Demartino A,Landolfo R,Mazzolani F M.The use ofthe Ramberg-Osgood law for materials of round-housetype[J].Materials and Structures,1990,23:59-67.
[12]Ramberg W,Osgood W R.Description of stress-straincurves by three parameters[R].Washington DC:NACA TN-902,1943.
[13]郭小农,沈祖炎,李元齐,等.国产结构用铝合金材料本构关系及物理力学性能研究[J].建筑结构学报,2007,28(6):110-117.(GUO Xiaonong,SHENZuyan,LI Yuanqi,et al.Stress-strain relationship andphysical-mechanical properties of domestic structuralaluminum alloy[J].Journal of Building Structures,2007,28(6):110-117.(in Chinese))
[14]孙训方,方孝淑,关来泰.材料力学:上册[M].4版.北京:高等教育出版社,2002:25-26.
[15]Shapiro S S,Wilk M B.An analysis of variance test fornormality:complete samples[J].Biometrika,1965,52(3/4):591-611.
[16]刘江.幂函数非线性化直接拟合方法[J].华北地震科学,1984,2(4):100-102.
[17]Szu H,Hartley R.Fast simulated annealing[J].Physics Letters A,1987,122(34):157-162.
[18]Ryden N,Park C B.Fast simulated annealing inversionof surface waves on pavement using phase-velocityspectra[J].Geophysics,2006,71(4):R49-R58.
[19]Steinhardt O.Aluminum constructions in civilengineering[J].Aluminum,1971,47:131-139.
[20]盛骤,谢式千,潘承毅.概率论与数理统计[M].4版.北京:高等教育出版社,2008:198-201.
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