中国激光, 2016, 43 (10): 1002005, 网络出版: 2016-10-12  

基于三维X射线成像和GTN模型的激光复合焊接7020铝合金的损伤机制

Damage Mechanism of Hybrid Welded 7020 Aluminium Alloy Based on Three-Dimensional X-Ray Micro-Tomography and GTN Model
作者单位
1 西南交通大学牵引动力国家重点实验室, 成都 610031
2 挪威科技大学结构工程系, 特隆霍姆N-7491, 挪威
3 中国科学院上海应用物理研究所上海同步辐射光源, 上海 201204
摘要
利用高精度同步辐射X射线三维成像技术,对激光-电弧复合焊缝的气孔率进行测定,并将其作为GTN损伤模型中的初始孔洞体积分数。通过建立含余高与不含余高的复合焊接接头的细观损伤力学有限元模型,得到了拉伸接头主应力和孔洞体积分数的分布。通过对拉伸断口金相组织进行分析,发现了几何和材料的不连续性是导致接头失效的重要原因。
Abstract
By the high resolution synchrotron radiation X-ray three-dimensional micro-tomography technology, the porosity in laser-arc hybrid welds is characterized, which is taken as the initial void volume fraction in the GTN mesoscopic damage model. The finite element models of mesoscopic damage mechanics for hybrid welded joints with and without reinforcement are developed, and the principal stress and the void volume fraction distribution of tensile joints are obtained. Via the metallographic structure analysis of tensile fractures, it is shown that the geometrical and material discontinuity is the important reason for joint failure.
参考文献

[1] 邬华芝, 郭海丁, 高德平. 焊接接头低周疲劳损伤分形演化模型[J]. 焊接学报, 2003, 24 (1): 88-90.

    Wu Huazhi, Guo Haiding, Gao Deping. Fractal damage evolution model of low-cycled fatigue in welded joint[J]. Transactions of the China Welding Institution, 2003, 24(1): 88-90.

[2] 张国栋, 周昌玉. 焊接接头残余应力及蠕变损伤的有限元模拟[J]. 金属学报, 2008, 44(7): 848-852.

    Zhang Guodong, Zhou Changyu. Finite element simulations of welding residual stress and creep damage for welded joint[J]. Acta Metallurgical Sinica, 2008, 44(7): 848-852.

[3] 赵超凡, 李兆霞. 焊接结构损伤区细观裂纹扩展的分形特征及其多尺度损伤表征[J]. 东南大学学报: 自然科学版, 2013, 43(5): 1039-1044.

    Zhao Chaofan, Li Zhaoxia. Fractal behavior of cracking in damaged zone of welded structures and its multi-scale characterization[J]. Journal of Southeast University: Natural Science Edition, 2013, 43(5): 1039-1044.

[4] Wang T J, Lou Z W. A continuum damage model for weld heat affected zone under low cycle fatigue loading[J]. Engineering Fracture Mechanics, 1990, 37(4): 825-829.

[5] Wang R J, Shang D G, Li L S, et al. Fatigue damage model based on the natural frequency changes for spot-welded joints[J]. International Journal of Fatigue, 2008, 30(6): 1047-1055.

[6] Gurson A L.Continuum theory of ductile rupture by void nucleation and growth: Part I-Yield criteria and flow rules for porous ductile media[J]. Journal of Engineering Materials and Technology, 1977, 99(1): 2-15.

[7] Needleman A, Tvergaard V. An analysis of ductile rupture in notched bars[J]. Journal of the Mechanics and Physics of Solids, 1984, 32(6): 461-490.

[8] 王绍刚, 王苏程, 张磊. 高分辨透射X射线三维成像在材料科学中的应用[J]. 金属学报, 2013, 49(8): 897-910.

    Wang Shaogang, Wang Sucheng, Zhang Lei. Application of high resolution transmission X-ray tomography in material science[J]. Acta Metallurgical Sinica, 2013, 49(8): 897-910.

[9] 高鸿奕, 谢红兰, 陈建文, 等. 硬X射线相位衬度成像的实验研究[J]. 中国激光, 2005, 32(2): 167-169.

    Gao Hongyi, Xie Honglan, Chen Jianwen, et al. Experimental research on hard X-ray phase-contrast imaging[J]. Chinese J Lasers, 2005, 32(2): 167-169.

[10] 孙慧敏, 王国珍, 轩福贞, 等. 焊接接头延性裂纹扩展的数值模拟[J]. 焊接学报, 2010, 31(8): 105-108.

    Sun Huimin, Wang Guozhen, Xuan Fuzhen, et al. Numerical simulation of ductile crack propagation in weld joint[J]. Transactions of the China Welding Institution, 2010, 31(8): 105-108.

[11] 王明正, 李晓延. TC4钛合金GTN损伤模型反向标定法研究[J]. 稀有金属材料与工程, 2012, 41(5): 795-799.

    Wang Mingzheng, Li Xiaoyan. Study on GTN damage model of TC4titanium alloy by an inverse approach[J]. Rare metal materials and engineering, 2012, 41(5): 795-799.

[12] 陈志英, 董湘怀. 基于GTN细观损伤模型的板料成形过程损伤分析[J]. 工程力学, 2009, 26(7): 238-244.

    Chen Zhiying, Dong Xianghuai. Ductile damage analysis for fracture in sheet metalforming based on GTN mesoscopic damage model[J]. Engineering Mechanics, 2009, 26(7): 238-244.

[13] He M, Li F G, Wang Z G. Forming limit stress diagram prediction of aluminum alloy 5052 based on GTN model parameters determined by in situ tensile test[J]. Chinese Journal of Aeronautics, 2011, 24(3): 378-386.

[14] Shen Y, Morgeneyer T F, Garnier J, et al. Three-dimensional quantitative in situ study of crack initiation and propagation in AA6061 aluminum alloy sheets via synchrotron laminography and finite-element simulations[J]. Acta Materialia, 2013, 61(7): 2571-2582.

[15] Nègre P, Steglich D, Brocks W. Crack extension in aluminium welds: A numerical approach using the Gurson-Tvergaard-Needleman model[J]. Engineering Fracture Mechanics, 2004, 71(16-17): 2365-2383.

[16] Zhang Z L, Thaulow C, degrd J. A complete Gurson model approach for ductile fracture[J]. Engineering Fracture Mechanics, 2000, 67(2): 155-168.

[17] Thomason P F. A three-dimensional model for ductile fracture by the growth and coalescence of micro-voids[J]. Acta Metallurgical, 1985, 33(6): 1087-1095.

[18] Tvergaard V. Influence of voids on shear band instabilities under plane strain conditions[J]. International Journal of Fracture, 1981, 17(4): 389-407.

[19] Chu C C, Needleman A. Void nucleation effects in biaxially stretched sheets[J]. Journal of Engineering Materials and Technology, 1980, 102(3): 249-256.

[20] 赵琳, 塚本进, 荒金吾郎, 等. 大功率光纤激光焊接过程中工艺参数对熔深和气孔的影响[J]. 中国激光, 2013, 40(11): 1103004.

    Zhao Lin, Tsukamoto Susumu, Arakane Goro, et al. Influence of welding parameters on weld depth and porosity in high power fiber laser welding[J]. Chinese J Lasers, 2013, 40(11): 1103004.

[21] 周万盛, 姚君山. 铝及铝合金的焊接[M]. 北京: 机械工业出版社, 2006: 48-49.

    Zhou Wansheng, Yao Junshan. The welding of aluminum and its alloy[M]. Beijing: China Machine Press, 2006: 48-49.

[22] 乔及森, 陈剑虹, 朱亮. 6063铝合金焊接接头及部件大变形力学行为研究[J]. 稀有金属材料与工程, 2009, 38(S3): 196-201.

    Qiao Jisen, Chen Jianhong, Zhu Liang. Development of large deformation behavior of aluminium alloy 6063 welded joints and basic components[J]. Rare Metal Materials and Engineering, 2009, 38(S3): 196-201.

[23] Wu S C, Yu C, Zhang W H, et al. Porosity induced fatigue damage of laser welded 7075-T6 joints investigated via synchrotron X-ray microtomography[J]. Science and Technology of Welding and Joining, 2015, 20(1): 11-19.

[24] Sato S, Matsumoto J, Okoshi N.Effects of porosity on the fatigue strength of 5083 alloy butt-welds[J]. Journal of Japan Institute of Light Metals, 1976, 26(8): 393-405.

段浩, 吴圣川, 徐忠伟, 张志良, 阚前华, 康国政, 付亚楠. 基于三维X射线成像和GTN模型的激光复合焊接7020铝合金的损伤机制[J]. 中国激光, 2016, 43(10): 1002005. Duan Hao, Wu Shengchuan, Xu Zhongwei, Zhang Zhiliang, Kan Qianhua, Kang Guozheng, Fu Yanan. Damage Mechanism of Hybrid Welded 7020 Aluminium Alloy Based on Three-Dimensional X-Ray Micro-Tomography and GTN Model[J]. Chinese Journal of Lasers, 2016, 43(10): 1002005.

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