『求助』倒角处的应力集中？
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求助：倒角处的应力集中？
如下代码所示：
一个轴对称法兰受力，在倒角处存在应力集中现象，该如何进行应力分析？
fini
/clear
/filname,plan42,1
/title,plan test
/prep7
!---------------define the material propertities------!
!-----------------------------------------------------!
et,1,plane42
keyopt,1,3,1
mp,ex,1,200e9
mp,dens,1,7871
mp,prxy,1,0.3
!mp,mu,1,0.1
r=0.001
r1=100*r
r2=220*r
r3=250*r
h1=50*r
h2=200*r
h3=50*r
rf=10*r
d=50*r
k,1,r1,
k,2,r3
k,3,r3,h1
k,4,r1+d,h1
k,5,r1+d,h2+h1
k,6,r2,h1+h2
k,7,r2,h2+h1+h3
k,8,r1,h1+h2+h3
a,1,2,3,4,5,6,7,8
lfillt,4,5,rf,,
al,9,11,10
aadd,all
numcmp,all
wpoffs,kx(9),ky(5)-rf
wprota,,-90
asbw,all
wprota,,,90
asbw,3
wpcsys,-1,0
wpoffs,,h1+(r3-d-r1)
wprota,,90
asbw,2
!meshing parameters
n1=20 !周向
n2=30 !径向
lesize,9,,,n1,,,,0
lesize,11,,,n2,2,,,0
amap,4,8,9,11,10
mshap,0,2d
mshkey,1
lesize,5,,,n1,,,,0
amesh,1
lesize,7,,,n1,,,,0
amesh,3
lesize,18,,,n1,,,0
lesize,3,,,n1,,,,0
amap,5,12,13,2,3
allsel,all
nummrg,all
numcmp,all
/solu
antype,0
csys,0
!固定约束
lsel,s,loc,y,0
dl,all,,all,
!载荷条件
alls
lsel,s,loc,y,h1+h2+h3
sfl,all,pres,9000000
allsel,all
eqslv,pcg,1e-8
save
solve
save,falan,rst
/post1
plnsol,u,y,0,1.0
plnsol,s,eqv,0,1.0
如下代码所示：
一个轴对称法兰受力，在倒角处存在应力集中现象，该如何进行应力分析？
fini
/clear
/filname,plan42,1
/title,plan test
/prep7
!---------------define the material propertities------!
!-----------------------------------------------------!
et,1,plane42
keyopt,1,3,1
mp,ex,1,200e9
mp,dens,1,7871
mp,prxy,1,0.3
!mp,mu,1,0.1
r=0.001
r1=100*r
r2=220*r
r3=250*r
h1=50*r
h2=200*r
h3=50*r
rf=10*r
d=50*r
k,1,r1,
k,2,r3
k,3,r3,h1
k,4,r1+d,h1
k,5,r1+d,h2+h1
k,6,r2,h1+h2
k,7,r2,h2+h1+h3
k,8,r1,h1+h2+h3
a,1,2,3,4,5,6,7,8
lfillt,4,5,rf,,
al,9,11,10
aadd,all
numcmp,all
wpoffs,kx(9),ky(5)-rf
wprota,,-90
asbw,all
wprota,,,90
asbw,3
wpcsys,-1,0
wpoffs,,h1+(r3-d-r1)
wprota,,90
asbw,2
!meshing parameters
n1=20 !周向
n2=30 !径向
lesize,9,,,n1,,,,0
lesize,11,,,n2,2,,,0
amap,4,8,9,11,10
mshap,0,2d
mshkey,1
lesize,5,,,n1,,,,0
amesh,1
lesize,7,,,n1,,,,0
amesh,3
lesize,18,,,n1,,,0
lesize,3,,,n1,,,,0
amap,5,12,13,2,3
allsel,all
nummrg,all
numcmp,all
/solu
antype,0
csys,0
!固定约束
lsel,s,loc,y,0
dl,all,,all,
!载荷条件
alls
lsel,s,loc,y,h1+h2+h3
sfl,all,pres,9000000
allsel,all
eqslv,pcg,1e-8
save
solve
save,falan,rst
/post1
plnsol,u,y,0,1.0
plnsol,s,eqv,0,1.0
2)改变网格密度试试;
3)改变导角大小试试.
问题答案就很明朗了!