Hello everyone.
I am encountering some problems while chasing after the convergence of my model.
I am using Ansys APDL in order to model the creep in steel under high temperatures.
I already did all the code, but I cannot find the issue.
All the geometry is very simple, just a cantilever beam under tension stresses.
The material model is composed by the multilinear elastic model, multilinear isotropic hardening model, creep model (time hardening P+S) and thermal strains.
The solution is divided in three stages:
- applying the uniform temperature;
- applying the force;
- enabling the creep effect by turing the rate on.
Even though, there is no convergence, and the log file keeps showing this:
"Material property EX of material 1 of element 2 is evaluated at a temperature of -14571.8048, which is below the supplied temperature range. Temperature range checking terminates."
Due to the excessive amount of errors and warnings, the program terminates. I've already looked in lots of discussions and could not find any situation similar to mine.
Here is what my solution steps looks like:
/SOLU
ANTYPE,0
NLGEOM,ON
OUTRES,ALL,ALL
NROPT,FULL
DK,1, , , ,0,UX,UY,UZ,ROTX,ROTY,ROTZ,
!-------------------------------------------------------------------------------
FK,3,FZ,1000
SBCTRAN
RATE,OFF
TIME,1e-8
AUTOTS,1
NSUBST,100,10000000,10
KBC,0
SOLVE
!-------------------------------------------------------------------------------
/SOLU
NLGEOM,ON
OUTRES,ALL,ALL
NROPT,FULL
BFL,ALL,TEMP,500
SBCTRAN
RATE,OFF
TIME,0.10
AUTOTS,1
NSUBST,100,10000000,10
KBC,0
SOLVE
!-------------------------------------------------------------------------------
/SOLU
NLGEOM,ON
OUTRES,ALL,ALL
NROPT,FULL
RATE,ON
TIME,1000
AUTOTS,1
NSUBST,100,10000000,10
AUTOTS,1
KBC,0
SOLVE
Anyhow, I've attached the .txt file (sorry for the portuguese comments, they help me to go through the problem).
If someone could give me a help, I'd be very grateful!
Kind Regards,
Arthur
Did u sort out or not. If no. Then I will help u. Currently I am working on Same problem. This is my email id: [email protected]
please check out the attached copy.
To solve ur problem I need clarification on 2 points
1 why don't u use 3d element for developing geometry and check out the element property.
2 please give reference for creep input values
- Badges
- Science topic