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1、二维焊接分析下面的命令流进行的是一个简单的二维焊接分析，利用ANSYS单元生死和热-结构耦合分析功能进行焊接过程仿真，计算焊接过程中的温度分布和应力分布以及冷却后的焊缝残余应力。/title,WeldAnalysisby〃ElementBirthandDeath"/prep7/unit,si!采用国际单位制i■et,1,13,4!13号二维耦合单元，同时具有温度和位移自Ftl度et,2,13,4I!1号材料是钢!2号材料是铝!3号材料是铜!铝是本次分析中的焊料，它将钢结构部分和铜结构部分焊接起来!下面是在几个温度点下，各材料的弹性模量mptemp,1,20,500,10
2、00,1500,2000mpdata,ex,1,1,1.93el1,1.50el1,0.70el1,0.lOel1,0.Olel1mpdata,ex,2,1,1.02el1,0.50el1,0.08el1,0.OOlel1,0.OOOlel1mpdata,ex,3,1,1.17ell,0.90el1,0.30ell,0.05el1,0.005ell!■!假设各材料都是双线性随动硬化弹塑性本构关系!下面是各材料在各温度点下的屈服应力和屈服后的弹性模量tb,bkin,1,5tbtemp,20,1tbdata,1,1200e6,0.193el1tbtemp,500,2tbda
3、ta,1,933e6,0.150el1tbtemp,1000,3tbdata,1,435e6,0.070el1tbtemp,1500,4tbdata,1,70e6,0.OlOelltbtemp,2000,5tbdata.,1,7e6,0.00lei1I■tb,bkin,2,5tbtemp,20,1tbdata,1,800e6,0.102elltbtemp,500,2tbdata,1,400e6,0.050elltbtemp,1000,3tbdata,1,70e6,0.008elltbtemp,1500,4tbdata,1,le6,0.OOOlelltbtemp,2000
4、,5tbdata.,1,0.Ie6,0.0000lei1I■tb,bkin,3,5tbtemp,20,1tbdata,1,900e6,0.117elltbtemp,500,2tbdata,1,700e6,0.090elltbtemp,1000,3tbdata.,1,230e6,0.030elltbtemp,1500,4tbdata,1,40e6,0.005elltbtemp,2000,5tbdata.,1,4e6,0.0005ellI■!材料密度（假设为常值）mp,dens,1,8030mp,dens,2,4850mp,dens,3,8900!热膨胀系数（假设为常值）m
5、p,alpx,1,1.78e~5mp,alpx,2,9.36e-6mp,alpx,3,1.66e~5!泊松比（假设为常值）mp,nuxy,1,0.29mp,nuxy,2,0.30mp,nuxy,3,0.30!热传导系数（假设为常值）mp,kxx,1,16.3mp,kxx,2,7.44mp,kxx,3,393!比热（假设为常值）mp,c,1,502mp,c,2,544mp,c,3,385!热膨胀系数（假设为常值）!由于该13号单元还有磁自由度，此处假设一磁特性，但并不影响我们所关心的结果mp,murx,1,1mp,murx,2,1mp,murx,3,1!假设焊料（铝）焊上
6、去后的初始温度是1500°Cmp,reft,1,20mp,reft,2,1500mp,reft,3,20!下面建立儿何模型csys,0k,1,0,0,0k,2,0.5,0,0k,3,1,0,0k,4,0,0.3,0k,5,0.35,0.3,0k,6,0.65,0.3,0k,7,1,0.3,0a,1,2,5,4a,2,6,5a,2,3,7,6!划分单元esize,0.025type,2mat,2amesh,2esize,0.05type,1mat,1amesh,1mat,3amesh,3eplotI■/soluantype,4!瞬态分析trnopt,fulli■!在模型的
7、左边界加位移约束nsel,all*get,minx,node,,mnloc,xnsel,s,loc,x,minxd,all,ux,0*get,miny,node,,mnloc,ynsei,r,loc,y,minyd,all,uy,0i■!假设在模型的左右边界处温度始终保持在20°C,其它边界条件如对流、辐射等都可!施加，此处因只是示意而已，故只施加恒温边界条件。nsei,all*get,minx,node,,mnloc,xnsel,s,loc,x,minxd,all,temp,20nsel,all*get,maxx,node,,mxloc
