restarting a transient analysis deletes defined parameters

[Fernandox]

I keep finfing this problem:

I am simulating a laser induced melting and resolidification of a ceramic material. Since the material densifies after melting and recristalizing, to simulate the material properties that change, I use a change of material (mpchg). To select the elements than must change I use:

/POST1
set,last
etable,melted,temp
esel,s,etab,melted,875
esel,r,mat,,1
finish

to select all elements that have a temperature above melting point and still have not been changed.

then with:

/SOLU
ANTYPE,,rest
mpchg,5,all
esel,all

I change the material of all the selected nodes.

The problem is that somehow this deletes all the defined parameters, like the power used for the HFLUX of the laser (lpow) or the position of the laser (posx). Then when I go to simulate a displacement of the laser or a change in the input power I get the message "Unknown parameter name=".

All the parameters are deleted! I think this has something to be with the antype,,rest. But this order is needed to resume the analysis after a /post1, or the next solve will recalculate from time=0.

Am I doing something wrong? How do I keep the parameter values? please help, and excuse me for my bad english

 

[meshparts]

Hello,

this should not happen. Restarting an analysis leads not to deletion of parameters. I suppose you are doing other operations witch are deleting the parameters. Perhaps you should put more of your APDL code here. From the little example I can not identify any error.

Regards
Alex

 

[Fernandox]

This is part of the code (most of the /solu part):


/solu
lpow=1.04 !starting laser power (W/mm)
j=30 !time of first step

*DO,c,0,10,1

SFE,..... !the laser power lpow is applied as a HFLUX to some surface elements

/POST1
set,last
etable,melted,temp
esel,s,etab,melted,875
esel,r,mat,,1
finish

/SOLU
ANTYPE,,rest
mpchg,5,all
esel,all

TIME,j
solve

lpow=lpow+0.077 !laser power increased
j=j+30 !next time step

*ENDDO