How to used the deformed shape as the new original shape? 1

[bobof77]

I am searching the possibilité to use the deformed
shape in a load step as an original one (together with the stress field) to contiuer the next load step calculation!
Any help will be appreciated!

 

[Drej]

Your input sequence should look something like:

! build the model
fini
/cle
/prep7
...
...
...

! enter solution and apply loads
/solu
ANTYPE,
F,...
solv

! Loads, etc. for 2nd load step (keeping results of first)
TIME,2 ! Time at end of second load step
F,...
solv
save
fini
! end


Cheers,

-- drej --

 

[bobof77]

Thanks a lots!

 

[bobof77]

But what is the operator for keeping the first load step result, please?

 

[bobof77]

here is my input file for ANSYS 5.6

I want to simulate a large deformation for a slice, which glids on a cylindrical plan. The Bilinear behavior is used as material characteristics, and large geometrical non linearity is on. The loads are imposed displacements. In face, cause ANSYS told 'soluction non convergened!' when I applied very large displacments, I'd like to apply the displacements step by step! In this way, I can obtain the final displacements I want.

 

[bobof77]

Here is my input file :

/FILNAME, bobine, 1
/PREP7
/TITLE, OPTIMISATION, Bobine Forme
ANTYPE, STATIC
ET,1,SOLID45,,1
MP,EX,1,2.1E5
MP,NUXY,1,0.3
/COM TABLE OF NONLINEARITY
TB,BKIN,1,1 ! DEFINE NON-LINEAR MATERIAL PROPERTY FOR STEEL
TBTEMP,0
TBDATA,1,86000,1.0E4

ALPHA = -5.0
RIN = 25.
EP = 10.0
LEN1 = 250.
REX = EP + RIN
BETA = 2.0/50./3.1415*360.
CSYS,1
LEN2 = 245.
CYL4,,,RIN,(90 - BETA),REX,(90 + BETA),LEN1
LESIZE,9,,,100
LESIZE,10,,,100
LESIZE,11,,,100
LESIZE,12,,,100
VMESH,1
/COM change the nodal coordinate systeme to cylindrical systeme
NROTAT,ALL
SAVE
SAVE,bobine,db,
FINISH

/SOLU
/com selectionner les points sur RIN
NSEL,S,LOC,X,RIN
D,ALL,UX
NSEL,S,LOC,Z,0.
D,ALL,ALL

NLGEOM,ON
PRED,ON
AUTOTS,ON
OUTRES,BASIC,10
OUTPR,,30
OUTPR,VENG,30

SAVE

TIME,1E-6
NSUBST,30
/COM imposed displacement
NSEL,S,LOC,Z,LEN1
D,ALL,UZ,(LEN2 - LEN1)
NSEL,R,LOC,Y,(90 + BETA)
D,ALL,UY,ALPHA
LSWRITE,1
NSEL,ALL
ESEL,ALL
SOLVE

TIME,1
NSUBST,30
/COM imposed displacement
NSEL,S,LOC,Z,LEN1
D,ALL,UZ,(LEN2 - LEN1)
NSEL,R,LOC,Y,(90 + BETA)
D,ALL,UY,ALPHA
LSWRITE,1
NSEL,ALL
ESEL,ALL
FINISH
/POST1
SET,1,LAST,1,

 

[bobof77]

/FILNAME, bobine, 1
/PREP7
/TITLE, OPTIMISATION, Bobine Forme
ANTYPE, STATIC
ET,1,SOLID45,,1
MP,EX,1,2.1E5
MP,NUXY,1,0.3
/COM TABLE OF NONLINEARITY
TB,BKIN,1,1 ! DEFINE NON-LINEAR MATERIAL PROPERTY FOR STEEL
TBTEMP,0
TBDATA,1,86000,1.0E4

ALPHA = -5.0
RIN = 25.
EP = 10.0
LEN1 = 250.
REX = EP + RIN
BETA = 2.0/50./3.1415*360.
CSYS,1
LEN2 = 245.
CYL4,,,RIN,(90 - BETA),REX,(90 + BETA),LEN1
LESIZE,9,,,100
LESIZE,10,,,100
LESIZE,11,,,100
LESIZE,12,,,100
VMESH,1
/COM change the nodal coordinate systeme to cylindrical systeme
NROTAT,ALL
SAVE
SAVE,bobine,db,
FINISH

/SOLU
/com selectionner les points sur RIN
NSEL,S,LOC,X,RIN
D,ALL,UX
NSEL,S,LOC,Z,0.
D,ALL,ALL

NLGEOM,ON
PRED,ON
AUTOTS,ON
OUTRES,BASIC,10
OUTPR,,30
OUTPR,VENG,30

SAVE

TIME,1E-6
NSUBST,30
/COM imposed displacement
NSEL,S,LOC,Z,LEN1
D,ALL,UZ,(LEN2 - LEN1)
NSEL,R,LOC,Y,(90 + BETA)
D,ALL,UY,ALPHA
LSWRITE,1
NSEL,ALL
ESEL,ALL
SOLVE

TIME,1
NSUBST,30
/COM imposed displacement
NSEL,S,LOC,Z,LEN1
D,ALL,UZ,(LEN2 - LEN1)
NSEL,R,LOC,Y,(90 + BETA)
D,ALL,UY,ALPHA
LSWRITE,1
NSEL,ALL
ESEL,ALL
SOLVE
FINISH
/POST1
SET,1,LAST,1,

 

[bobof77]

But when I look at the calculation results I found the same deformed shapes for both step 1 and 2!

does it mean that your method will only work when the load is Force or I need some commands to keep the first load step results?

thanks!