焊接接头细观多晶模型及拉伸应力变化数值模拟Mesoscopic polycrystalline model of welded joints and numerical simulation of stress change under tension
丛述玲;金成;
摘要(Abstract):
基于Voronoi算法对铝合金焊接接头进行细观组织建模,构建三维等轴晶、柱状晶区结合区域的多晶模型。结合接头初始晶粒取向,并将其赋予到多晶模型中。运用晶体塑性理论,编写用户自定义材料子程序,对焊态下及经腐蚀后的接头在拉伸状态下的细观应力分布进行数值模拟研究。结果表明:在拉伸形变的过程中,接头细观最大应力出现在柱状晶区、等轴晶结合区域,并且随着腐蚀的平均深度和表面损伤度增加,蚀坑边缘产生应力突变,其应力峰值变大,容易成为裂纹起裂的源头。
关键词(KeyWords): 铝合金焊接接头;腐蚀;多晶模型;晶体塑性有限元;细观应力
基金项目(Foundation): 国家自然科学基金项目(51105049)
作者(Author): 丛述玲;金成;
Email:
DOI: 10.14024/j.cnki.1004-244x.20160824.003
参考文献(References):
- [1]TAYLOR G I.Plastic strain in metals[J].Journal of Institute of Metals,1938,62:307-324.
- [2]TAYLOR G.Stephen timoshenko 60th anniversary volume[J].National Mathematics Magazine,1940,14(4):232-232.
- [3]HILL R,RICE J R.Constitutive analysis of elastic-plastic crystal at arbitrary strain[J].Journal of the Mechanics and Physics of Solids,1972,20(5):401-413.
- [4]HILL R,RICE J.A self-consistent mechanics of composite materials[J].Journal of the Mechanics and Physics of Solids,1965,13(4):213-222.
- [5]ASARO R J,NEEDLEMAN A.Texture development and strain hardening in rate dependent polycrystals[J].Acta Metallurgica,1985,33(6):923-953.
- [6]ASARO R J,ADV NEEDLEMAN A.An analysis of nonuniform and localized deformation in ductile single crystals[J].Acta Metallurgica,1982,30(6):1087-1119.
- [7]ROTERS F,EISENLOHR P,BIELER T R,et al.Crystal plasticity finite element methods[M].British:Wiley-VCH Verlag Gmb H&Co.KGa A,2010:1-11.
- [8]陆璐,王照旭,王辅忠,等.塑性有限元法在金属轧制过程中组织演化模拟进展[J].材料导报,2013,6(3):62-66.
- [9]郑华雷,杨合,李宏伟.纯钛压缩变形下的晶体塑性有限元分析[J].塑性工程学报,2013,8(1):55-62.
- [10]ARENA P,FAZZINO S,FORTUNA L,et al.Game theory and non-linear dynamics:the Parrondo paradox case study[J].Chaos Solitons and Fractals,2003,17(2):545-555.
- [11]GORTI B S,PAUL R D.Texture predictions using a po1ycrysta1 plasticity model incorporating neighbor interactions[J].Int J Plasticity,1996,12(8):1023-1054.
- [12]BARBE F,DECKER L,CAILLETAUD G,et al.Intergranular and intragranular behavior of polycrystalline aggregates[J].International Journal of Plasticity,2001,17(4):513-536.
- [13]王娜.镁合金变形的晶体塑性有限元分析[J].稀有金属学报,2008,32(6):766-773.
- [14]蹇海根,尹志民,谢幸儿,等.船用5A01铝合金焊接接头组织与性能研究[J].武汉理工大学学报,2013,35(6):50-54.
- [15]AKESELSEN O M,GRONGΦ,RYUM N,et al.Modelling of grain growth in metals and alloy[J].Acta Metal,1986,34(9):1807-1815.
- [16]NAKANISHI MUTSUO,KOMIZO YU-ICHI,SETA ICHIRO.Improvement of welded HAZ toughness by dispersion with nitride particles and oxide particles[J].Japan Welding Society,1983,52(2):117-131.
- [17]MUZUKI S.Solution of Ti N during synthetic weld thermal cycling and HAZ toughness in low carbon steels[J].Trans JWS,1987,18(2):58-68.
- [18]SHORNE M,GUPTA O P,MOHANTY O N.A modified analytical approach for modelling grain HAZ of HSLA steels[J].Scripta Materialia,2004,50:1007-1010.