hi all,
thanks lot, actually how to solve nonlinear buckling analysis?
1.what is the adavantage of nonlinear analysis,will u get new critical load or same value of linear buckling load?
2.one of the imechanica member suggested the follwing code,i done using tha t code but what ever im giving time value same value getting after converging my solution.
Here is the code that I used to perform the analysis:
/SOLU ! Enter the solution mode
ANTYPE,STATIC
PSTRES,ON
!boundary conditions
SFA,ALL,1,PRES,-0.1, !Apply atmospheric pressure
LSEL,S,LOC,z,0
DL,ALL,,UX,0
DL,ALL,,UY,0
DL,ALL,,UZ,0
LSEL,S,LOC,z,900
DL,ALL,,UX,0
DL,ALL,,UY,0
lsel,all
asel,all
nsel,all
SOLVE
FINISH
!************************Eigenvalue buckling analysis ***************************
/SOLU ! Enter the solution mode again to solve buckling
ANTYPE,BUCKLE ! Buckling analysis
BUCOPT,LANB,6
PLDISP ! Plots the deflected shape
!****************************Nonlinear buckling analysis *************************
*GET,MYLOADF,ACTIVE,,SET,FREQ
/PREP7
/INQUIRE,MYJOBNAME,JOBNAME
UPGEOM,0.005,1,1,%MYJOBNAME(1)%,RST
!F,1254,FX,1
/SOLU
ANTYPE,STATIC
NLGEOM,ON
TIME,MYLOADF*1.1
NSUBST,20,1E5,20
OUTRES,ALL,ALL
LNSRCH,ON
SFSCALE,ALL,1.1*MYLOADF
/SOLU
SOLVE
plz help me for above questions.my model perforated plate subjected uniform compreesion load i got linear buckling perfectly, but ididn't get nonlinear buckling load.
thanks in advance