Learning Forum

[Adeleine Cabrera]

Hi. I got an error stated above. There seems to be a problem with my APDL code. I'm trying to use SOLID65 and define stress and strain for every temperature. I have also tried to input "AMESH" above "/sol" but it didn't work. The mesh is already a tetrahedron linear mesh. I have tried to supress the APDL code and the analysis worked so, the problem really is on the APDL Code. But, I can't spot the error. Kindly help me on this. Thank you.
Here's what the APDL Command contains:

/PREP7

solid65_matid = 9996

 

MPTEMP,1,20,200,400,600,800,900

MPDATA,EX,solid65_matid,1,12379.7911,5463.276115,2636.625645,747.8055365,336.5124914,186.9513841

MPDATA,PRXY,solid65_matid,1,0.2,0.2,0.2,0.2,0.2,0.2

 

TB,MELAS,solid65_matid,10,6

 

TBTEMP,20

TBPT,,0.0004999, 6.1884

TBPT,,0.0009995, 12.0469

TBPT,,0.0014989, 16.8393

TBPT,,0.0019980, 19.8166

TBPT,,0.0024969, 20.7518

 

 

TBTEMP,200

TBPT,,0.0010994, 6.0063

TBPT,,0.0021976, 11.6995

TBPT,,0.0032946, 16.3635

TBPT,,0.0043903, 19.2682

TBPT,,0.0054849, 20.1894

 

TBTEMP,400

TBPT,,0.0019980, 5.2680

TBPT,,0.0039920, 10.2706

TBPT,,0.0059821, 14.3777

TBPT,,0.0079682, 16.9450

TBPT,,0.0099503, 17.7710

 

TBTEMP,600

TBPT,,0.0049875, 3.7297

TBPT,,0.0099503, 7.2931

TBPT,,0.0148886, 10.2398

TBPT,,0.0198026, 12.1036

TBPT,,0.0246926, 12.7305

 

TBTEMP,800

TBPT,,0.0049875, 1.6784

TBPT,,0.0099503, 3.2819

TBPT,,0.0148886, 4.6079

TBPT,,0.0198026, 5.4466

TBPT,,0.0246926, 5.7287

 

TBTEMP,900

TBPT,,0.0049875, 0.9324

TBPT,,0.0099503, 1.8233

TBPT,,0.0148886, 2.5599

TBPT,,0.0198026, 3.0259

TBPT,,0.0246926, 3.1826

 

TB,CONC,solid65_matid,1,9, 

TBTEMP,,

TBDATA,,0.3,1, 3.59  ,-1,0,0

 

!*

ET,solid65_matid,SOLID65

KEYOPT,solid65_matid,1,1

 

CMSEL,S,NM_Con,ELEM            

EMODIF,ALL,TYPE,solid65_matid, 

EMODIF,ALL,MAT,solid65_matid,

 

ALLSEL,ALL

/SOLU

 

 

I've tried to separate the code for modifying materials and type. Only modifying the type seems to get the error stated above while modifying the materials continued the analysis but there is a convergence error (stated below is the error) that stopped the analysis.

"Solution not converged at time 7.2 (load step 1 substep 1).            
  Run terminated."

Your answer would be a great help.

[Govindan Nagappan]

Looks like you are using an undocumented element. Do you know the order in which the nodes are written for solid65. Since you are changing the type from another solid element, see if this solid element also uses the same node sequence. Otherwise emodif will result in error.

For example: see solid 70. You can see the node sequence I, J,K,L...

Element is defined using this sequence

 

 

Or check the element definition in the input file and see if it is properly written in the input file. If there is mesh corruption, that could also cause this, 

[Adeleine Cabrera]

Hi. I actually did Transient Thermal Analysis first and I used that SOLID70 for the solid. I transferred the results of the transient thermal analysis to transient structural analysis. Hence, for transient structural analysis, I need to make the solid to have SOLID65, which has the same number of nodes as SOLID70. SOLID70 worked for the transient thermal analysis so, I don't get why SOLID65 doesn't work for Transient Structural Analysis.

[Govindan Nagappan]

Can you use the ETCHG command - ETCHG (ansys.com)

 

[Adeleine Cabrera]

Hi. It still says the element has an undefined number 0. I want to use SOLID65 because the solid is a reinforced concrete. I tried ETCG,TTS alone but it just resulted to SOLID185 and SOLID285.

[Adeleine Cabrera]

Hi. It still says the element has an undefined number 0. I want to use SOLID65 because the solid is a reinforced concrete

[Ivana Drobnjak]

Did you find the solution? I have the same problem. Thank you. I want to change SOLID 185 to CPT 215.