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胡远琳

新虫 (初入文坛)

应助: 0 (幼儿园)
金币: 244.1
帖子: 14
在线: 16.7小时
虫号: 2658732
注册: 2013-09-16
专业: 建筑环境与结构工程

[求助] ansys/ls-dyna拉伸颈缩模拟求助

最近在用ansys/ls-dyna做焊接接头拉伸模拟，在右端施加恒定位移载荷，结果接头几乎只是向右端平移，没大变形，更别提颈缩。
命令流如下：
/title,lashen
/prep7
et,1,plane162
mp,ex,1,207e+11
mp,nuxy,1,0.27
mp,dens,1,7800
tb,biso,1,,,,
tbdat,1,4e8
tbdat,2,1.0e10
edmp,hgls,1,5,0.1,1.5,0.06

et,2,plane162
mp,ex,2,210e+11
mp,nuxy,2,0.3
mp,dens,2,7850
tb,biso,2,,,,
tbdat,1,2.3e8
tbdat,2,1.5e10
edmp,hgls,1,5,0.1,1.5,0.06

RECT,-150,150,0+391.8,14.7+391.8
k,5,1.056546,391.8,0
k,6,-1.056546,391.8,0
k,7,6.854722,14.7+391.8,0
k,8,-6.854722,14.7+391.8,0
k,9,0,16+391.8,0
larc,7,8,9
a,5,7,8,6
AGEN,2,2
ASBA,1,2
AGLUE, ALL
k,14,1.056546+0.75,391.8,0
k,15,6.854722+0.75,14.7+391.8,0
l,14,15
asbl,1,6
k,16,1.056546+0.75+1,391.8,0
k,17,6.854722+0.75+1,14.7+391.8,0
l,16,17
asbl,4,1
k,18,1.056546+0.75+1+0.75,391.8,0
k,19,6.854722+0.75+1+0.75,14.7+391.8,0
l,18,19
asbl,1,7
k,20,-1.056546-0.75,391.8,0
k,21,-6.854722-0.75,14.7+391.8,0
l,20,21
asbl,2,3
k,22,-1.056546-0.75-1,391.8,0
k,23,-6.854722-0.75-1,14.7+391.8,0
l,22,23
asbl,1,5
k,24,-1.056546-0.75-1-0.75,391.8,0
k,25,-6.854722-0.75-1-0.75,14.7+391.8,0
l,24,25
asbl,9,16
aglue,all
k,26,15,391.8,0
k,27,15,391.8+14.7,0
l,26,27
asbl,7,26
k,28,-15,391.8,0
k,29,-15,391.8+14.7,0
l,28,29
asbl,1,20
aglue,all
asel,s,area,,4
aatt,2,,2
esize,1
mshape,0,2D
mshkey,0
amesh,4

asel,s,area,,5
aatt,2,,2
esize,1
mshape,0,2D
mshkey,0
amesh,5

asel,s,area,,6
aatt,2,,2
esize,1
mshape,0,2D
mshkey,0
amesh,6

asel,s,area,,8
aatt,2,,2
esize,1
mshape,0,2D
mshkey,0
amesh,8

asel,s,area,,2
aatt,2,,2
esize,1
mshape,0,2D
mshkey,0
amesh,2

asel,s,area,,10
aatt,2,,2
esize,1
mshape,0,2D
mshkey,0
amesh,10

asel,s,area,,9
aatt,1,,1
esize,2
mshape,0,2D
mshkey,0
amesh,9

asel,s,area,,7
aatt,1,,1
esize,2
mshape,0,2D
mshkey,0
amesh,7

asel,s,area,,3
aatt,1,,1
esize,1
mshape,0,2D
mshkey,0
amesh,3

asel,s,area,,12
aatt,1,1,1
esize,1
mshape,0,2D
mshkey,0
amesh,12

asel,s,area,,11
aatt,1,1,1
esize,1
mshape,0,2D
mshkey,0
amesh,11
allsle,all

lsel,s,,,4
nsll,s,1
d,all,ux,0
lsel,s,,,12,14,1
nsll,s,1
d,all,uy,0
lsel,s,,,8
nsll,s,1
d,all,uy,0
lsel,s,,,17
nsll,s,1
d,all,uy,0
lsel,s,,,21
nsll,s,1
d,all,uy,0
lsel,s,,,27
nsll,s,1
d,all,uy,0
lsel,s,,,24
nsll,s,1
d,all,uy,0
lsel,s,,,29
nsll,s,1
d,all,uy,0
lsel,s,,,32
nsll,s,1
d,all,uy,0
lsel,s,,,35
nsll,s,1
d,all,uy,0

lsel,s,,,2
nsll,s,1
d,all,uy,0
lsel,s,,,2
nsll,s,1
cm,node1,node
*dim,time,array,2,1,1
time(2,1,1)=100
*dim,compress,array,2,1,1
compress(2,1,1)=30

edload,add,ux,,node1,time,compress
allsel,all
finish
/solu
edopt,add,blank,both

time,300
edrst,100
edhtime,100
outres,all,all
solve
finish
应该要设定断裂准则，应该怎么设定呢？
跪求指导！！
变形截图如下

_BC`B1W7EN%_L)WNYP2V6)S.png

MSRV~Y((GJ}[Y2HZ(7_VC(M.png@wuming524

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