用kscon命令划分裂纹尖端网格总是报警。

jetaimepkda

求高人指点 本人在做一个断裂的模拟 定义了两个裂纹尖端 但是总是报警 问题出在尖端的单元
命令流如下：
FINISH
/CLEAR,START
/PREP7
/unit,si

W=50
D=50
ID=24
a=5
b=30
t=1
IP=W-a-b

mp,ex,1,48E3
mp,prxy,1,0.19
et,1,183
keyopt,1,1,1
keyopt,1,3,1
keyopt,1,6,0
k,1,ID/2,b
k,2,ID/2+t,b
k,3,ID/2+t,W-a,
k,4,ID/2,W-a,
k,5,ID/2+t/2,b+IP/2
a,1,1,2,3,4
rectng,0,ID/2,,W
rectng,ID/2+t,D/2,,W
aglue,1,2,3

kwpave,1,
wprota,,90,
asbw,5
asbw,4
kscon,1,a/12,1,5
kwpave,4,
asbw,3
asbw,6
kscon,4,a/12,1,5
kwpave,5,
asbw,1
asbw,4
asbw,3
wpoffs,,,22.5
asbw,2
asbw,5
save

aatt,all
esize,2
lsel,s,lenght,,t/2,t/2,,
lesize,all,,10,,,,,1
lsel,s,line,,26,27,
lsel,a,line,,19,19,,
lsel,a,line,,24,24,,
lesize,all,1,,
lsel,s,line,,33,33,,
lsel,a,line,,12,12,,
lesize,all,1,,
allsel
amesh,all

如果有更好地划分方式 请高人不吝赐教。