vangapandu goutham
Subscriber

so I have this very small doubt 

my solution keeps on showing the error that the element is highly distorted (* I have tried reducing the mesh size and increasing the load steps to 10k)

should I need to use this element of birth and death technique

 

here is my model script

 
 
/clear
/prep7
 
!keypoints
k,1,0,0,0
k,2,0,1.72,0
k,3,0,4.72,0
k,4,0,16.5,0
k,5,0,19.5,0
k,6,0,20,0
k,7,0,22,0
k,8,8,22,0
k,9,8,20,0
k,10,8,19.5,0
k,11,8,16.5,0
k,12,8,4.72,0
k,13,8,1.72,0
k,14,8,0,0
k,15,8.5,22,0
k,16,8.5,20,0
k,17,8.5,19.5,0
k,18,8.5,16.5,0
k,19,8.5,4.72,0
k,20,8.5,1.72,0
k,21,18,22,0
k,22,18,20,0
k,23,18,19.5,0
k,24,18,16.5,0
k,25,18,4.72,0
k,26,18,1.72,0
k,27,25.4,19.5,0
k,28,25.4,16.5,0
k,29,25.4,4.72,0
k,30,25.4,1.72,0
k,31,100,19.5,0
k,32,100,16.5,0
k,33,100,4.72,0
k,34,100,1.72,0
 
 
!element type
allsel
et,1,183,,,1
 
a,1,2,13,14
a,2,3,12,13
a,3,4,11,12
a,4,5,10,11
a,5,6,9,10
a,6,7,8,9
a,9,8,15,16
a,10,9,16,17
a,11,10,17,18
a,12,11,18,19
a,13,12,19,20
a,20,19,25,26
a,19,18,24,25
a,18,17,23,24
a,17,16,22,23
a,16,15,21,22
a,24,23,27,28
a,25,24,28,29
a,26,25,29,30
a,30,29,33,34
a,29,28,32,33
a,28,27,31,32
 
 
!material properties 
!Stainless steel 303
mp,ex,1,193000
mp,prxy,1,0.25
 
!Hysol EA 9394 Adhesive
mp,ex,2,4068
mp,prxy,2,0.37
 
 
 
!need to add stress and strain values
 
!E-QXM 3608 glass laminate
mp,ex,3,18850
mp,ey,3,18850
mp,ez,3,18850
mp,prxy,3,0.3
mp,pryz,3,0.3     
mp,prxz,3,0.3
mp,gxy,3,7230
mp,gyz,3,7230
mp,gxz,3,7230
 
!Vinyl ester balsa core 
mp,ex,4,2800
mp,ey,4,83
mp,ez,4,32
mp,prxy,4,0.014
mp,pryz,4,0.011
mp,prxz,4,0.65
mp,gxy,4,140
mp,gyz,4,76
mp,gxz,4,45
 
!Vinyl-ester glass composite
mp,ex,5,3710
mp,prxy,5,0.28
 
 
/NERR,9999999999
 
 
AESIZE,ALL,2
allsel
amesh,all,all
 
SHPP,ON 
 
allsel
asel,s,,,1,6,1
asel,a,,,7,16,9
esla
emodif,all,mat,1
 
 
 
asel,s,,,8,11,1
asel,a,,,15
esla
emodif,all,mat,2
 
 
asel,s,,,12,14,2
asel,a,,,17,19,2
asel,a,,,20,22,2
esla
emodif,all,mat,3
 
 
asel,s,,,21
esla
emodif,all,mat,4
 
 
asel,s,,,13,18,5
esla
emodif,all,mat,5
 
 
!allsel
et,2,186
emodif,all
type,2
 
!To clear 2d plane elements and extrude 
allsel
extopt,aclear,1
eextrude,axis,0,,,90,,
 
 
allsel
eplot
 
!load conditioning
 
allsel
nsel,r,loc,y,21.9,22
d,all,uy,9
 
allsel
nsel,r,loc,y,1.62,1.72
csys,5
nsel,u,loc,x,0,50.8
d,all,all
csys
 
 
!Symmetry
allsel
nsel,r,ang,zx,0
d,all,uz,0
 
allsel
nsel,r,ang,zx,-90
d,all,ux,0
 
allsel
eplot
 
/solu
antype,static,new
CNVTOL,F,1000000,0.001,2,,
NROPT,AUTO
 
OUTRES,all,all
NLGEOM,ON
AUTOTS,AUTO
 
nsubst,100,100,100
neqit,100
 
allsel
solve
 
 
!!All the dimensions are in mm and Mpa