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11050209银虫 (正式写手)
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[求助]
接触问题求助 已有1人参与
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两块板通过螺栓连接，拉伸问题的求助，搞不懂什么原因导致算出来的应力特别小！由于第一次接触到接触分析，所以不是很懂，我觉得问题可能出在接触这一块，不知道大神能不能帮看下，还有一个可能就是我施加的约束不够?如果是约束的问题又该怎么加约束呢 附上命令： /prep7 /TITLE, lashen !定义单元类型及材料属性 et,1,solid185 et,2,plane182 mp,ex,1,190e6 mp,ex,2,184e6 mp,ex,3,69e9 mp,prxy,1,0.34 mp,prxy,2,0.3 mp,prxy,3,0.33 !定义参数 l1=100/1000 !试样长度 l2=34/1000 !夹头长度 w1=24/1000 !试样宽度 w2=33.8/1000 !夹头宽度 h=1.5/1000 !试样厚度 l3=48/1000 !试样交叠部分长度 r=4.9/1000 !连接圆弧半径 r1=6.25/2/1000 !圆台下表面半径 r2=8.75/2/1000 !圆台上表面半径 r3=4/1000 !螺母半径 pload1=100000000*2*h*w2 pload2=-pload1 !建立几何模型(TA32) block,-l3/2,-l3/4,0,w1/2,0,h block,-l3/4,0,0,w1/2,0,h block,-l3/4,0,-w1/2,0,0,h block,-l3/2,-l3/4,-w1/2,0,0,h block,0,l3/4,0,w1/2,0,h block,l3/4,l3/2,0,w1/2,0,h block,l3/4,l3/2,-w1/2,0,0,h block,0,l3/4,-w1/2,0,0,h wpoff,-12/1000,0,0 cone,r1,r2,0,h wpoff,24/1000,0,0 cone,r1,r2,0,h vsel,s,,,1,4,1 allsel vsbv,all,9 allsel vsel,s,,,5,8,1 allsel vsbv,all,10 numcmp,all CSYS,0 WPAVE,0,0,0 CSYS,0 block,-37.1/1000,-24/1000,-w1/2,w1/2,0,h k,73,-42/1000,w1/2+r,h k,74,-76/1000,w1/2+r,h k,75,-76/1000,-(w1/2+r),h k,76,-42/1000,-(w1/2+r),h larc,72,73,54,r l,73,74 l,74,75 l,75,76 larc,76,69,54,r lsel,s,,,125,129,1 lsel,a,,,120 al,all allsel vdrag,63,,,,,,121 block,-76/1000,-42/1000,-w2/2,w2/2,-h,0 numcmp,all nummrg,all a,73,82,79,76 vsba,10,8 numcmp,all allsel vglue,all !建立几何模型(7050) block,-l3/2,-l3/4,0,w1/2,-h,0 block,-l3/4,0,0,w1/2,-h,0 block,-l3/4,0,-w1/2,0,-h,0 block,-l3/2,-l3/4,-w1/2,0,-h,0 block,0,l3/4,0,w1/2,-h,0 block,l3/4,l3/2,0,w1/2,-h,0 block,l3/4,l3/2,-w1/2,0,-h,0 block,0,l3/4,-w1/2,0,-h,0 wpoff,-12/1000,0,0 cylind,0,r1,0,-h wpoff,24/1000,0,0 cylind,0,r1,0,-h vsel,s,,,14,16,1 vsel,a,,,9 allsel vsbv,all,21 vsel,s,,,17,20,1 allsel vsbv,all,22 CSYS,0 WPAVE,0,0,0 CSYS,0 block,24/1000,37.1/1000,-w1/2,w1/2,-h,0 k,139,42/1000,w1/2+r,0 k,140,76/1000,w1/2+r,0 k,141,76/1000,-(w1/2+r),0 k,142,42/1000,-(w1/2+r),0 larc,85,139,19,r l,139,140 l,140,141 l,141,142 larc,82,142,24,r lsel,s,,,186,187,1 lsel,a,,,192,193,1 lsel,a,,,167,197,30 al,all vdrag,99,,,,,,178 block,42/1000,76/1000,-w2/2,w2/2,0,h a,117,121,114,100 vsba,18,143 vsel,s,,,14,17,1 vsel,a,,,23,26,1 vsel,a,,,19,21,1 vsel,a,,,9 vglue,all numcmp,all !建立几何模型(1s627) wpoff,-12/1000,0,0 cone,r1,r2,0,h cylind,0,r1,0,-(h+h) cylind,r1,r3,-h,-(h+h) allsel vsel,s,,,25,27,1 vglue,all wpoff,24/1000,0,0 cone,r1,r2,0,h cylind,0,r1,0,-(h+h) cylind,r1,r3,-h,-(h+h) allsel vsel,s,,,27,30,3 vsel,a,,,26 vglue,all CSYS,0 WPAVE,0,0,0 CSYS,0 allsel !划分网格(TA32) MSHAPE,0,2D MSHKEY,1 mat,1 lsel,s,,,7,8 lesize,all,,,6 lsel,s,,,74,76,2 lesize,all,,,4 ALLSEL,ALL AMAP,39,4,33,32,5 lsel,s,,,17,18,1 lesize,all,,,6 AMAP,43,5,32,31,9 allsel AMAP,47,9,31,34,13 AMAP,50,13,34,33,4 lsel,s,,,4,6,2 lesize,all,,,4 ALLSEL,ALL AMAP,7,9,41,40,18 AMAP,14,18,40,39,21 AMAP,22,21,39,42,25 AMAP,34,25,42,41,9 lsel,s,,,35 lesize,all,,,3 vsel,s,,,1,8,1 vsweep,all asel,s,,,39,43,4 asel,a,,,47,50,3 asel,a,,,7,14,7 asel,a,,,22,34,12 aclear,all allsel vsweep,13 lsel,s,,,93 lesize,all,,,2,2 allsel lsel,s,,,97 lesize,all,,,2,0.5 vsweep,11 lsel,s,,,94,96,2 lesize,all,,,17 vsweep,12 vsweep,10 allsel !划分网格(7050) mat,3 AMAP,96,62,101,100,63 AMAP,121,63,100,99,76 AMAP,132,76,99,102,68 AMAP,129,68,102,101,62 AMAP,73,76,109,108,77 AMAP,114,77,108,107,83 AMAP,117,83,107,110,88 AMAP,111,88,110,109,76 lsel,s,,,125 lesize,all,,,3 vsel,s,,,17,21,1 vsel,a,,,23,24,1 vsel,a,,,9 vsweep,all asel,s,,,73,96,23 asel,a,,,111,117,3 asel,a,,,121,129,8 asel,a,,,132 aclear,all allsel lsel,s,,,218,220,2 lesize,all,,,7 vsweep,22 lsel,s,,,199,200,1 lesize,all,,,2,2 vsweep,14 lsel,s,,,185,187,2 lesize,all,,,17 vsweep,16 vsweep,15 !划分网格(1s627) mat,2 lsel,s,,,231,234,1 lesize,all,,,12 vsweep,25 lsel,s,,,259,262,1 lesize,all,,,12 vsweep,28 lsel,s,,,255,258,1 lesize,all,,,12 vsweep,29 lsel,s,,,241,244,1 LESIZE,all, , ,12 vsweep,26 lsel,s,,,291,294,1 lesize,all,,,12 vsweep,31 lsel,s,,,287,290,1 lesize,all,,,12 vsweep,32 allsel !建立接触对 mp,mu,4,0.3 mat,4 r,4 real,4 et,3,targe170 et,4,conta173 !generate the target surface asel,s,,,135,136,1 cm,left_up_bolt,area cmsel,s,left_up_bolt type,3 nsla,s,1 esln,s,0 esurf,all allsel !generate the contact surface asel,s,,,37,45,4 asel,a,,,48 cm,left_up_plate,area cmsel,s,left_up_plate type,4 nsla,s,1 esln,s,0 esurf,all allsel !generate the target surface mat,4 r,5 real,5 et,5,targe170 et,6,conta173 asel,s,,,147,148,1 cm,left_down_bolt,area cmsel,s,left_down_bolt type,5 nsla,s,1 esln,s,0 esurf,all allsel !generate the contact surface asel,s,,,94,97,3 asel,a,,,99,100,1 cm,left_down_plate,area cmsel,s,left_down_plate,area type,6 nsla,s,1 esln,s,0 esurf,all allsel !generate the target surface mat,4 r,6 real,6 et,7,targe170 et,8,conta173 asel,s,,,140,141,1 cm,right_up_bolt,area cmsel,s,right_up_bolt type,7 nsla,s,1 esln,s,0 esurf,all allsel !generate the contact surface asel,s,,,3,9,6 asel,a,,,19,32,13 cm,right_up_plate,area cmsel,s,right_up_plate type,8 nsla,s,1 esln,s,0 esurf,all allsel !generate the target surface mat,4 r,7 real,7 et,9,targe170 et,10,conta173 asel,s,,,160,161,1 cm,right_down_bolt,area cmsel,s,right_down_bolt type,9 nsla,s,1 esln,s,0 esurf,all allsel !generate the contact surface asel,s,,,56,74,18 asel,a,,,77,87,10 cm,right_down_plate,area cmsel,s,right_down_plate type,10 nsla,s,1 esln,s,0 esurf,all allsel !generate the target surface mat,4 r,8 real,8 et,11,targe170 et,12,conta173 asel,s,,,6,13,7 asel,a,,,20,33,13 asel,a,,,38,46,4 asel,a,,,49 cm,left_plate,area cmsel,s,left_plate type,11 nsla,s,1 esln,s,0 esurf,all allsel !generate the contact surface asel,s,,,129,132,3 asel,a,,,96,121,25 asel,a,,,111,117,6 asel,a,,,73,114,41 cm,right_plate,area cmsel,s,right_plate type,12 nsla,s,1 esln,s,0 esurf,all allsel /sol antype,static nlgeom,on autots,on lnsrcch,on pred,on outres,all,all time,1 nsubst,80,1000,20 nsel,s,loc,x,76/1000,76/1000 cp,1,ux,all d,7377,uy,0 d,7377,uz,0 nsel,s,loc,x,76/1000,76/1000 nsel,r,loc,y nsel,r,loc,z f,all,fx,pload1 allsel nsel,s,loc,x,-76/1000,-76/1000 cp,1,ux,all nsel,s,loc,x,-76/1000,-76/1000 nsel,r,loc,y nsel,r,loc,z f,all,fx,pload2 allsel solve finish |
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