How to use the *Restart command in my case?

1

I have a layered part.
In the first .inp, a coupled analysis of layer 1 is performed, injecting heat into layer 1, causing deformations.

I want the second .inp to import the temperatures and deformations from the first analysis.

How do I do that?

inps:
Reio99/Test

2

First of all, restart (unlike import in Abaqus) is not meant to import results from a previous analysis to another simulation with modified model settings. Restart is only a simple continuation - you can add more steps to already solved analysis but it works in the same way as multistep analyses. You can’t change any model features, only add new steps and step-dependent (analysis) features.

With that said, to use restart in CalculiX you should:

  1. Include *RESTART, WRITE within the step definition in the input file for the first analysis.
  2. Create a new input file for the subsequent analysis and start it with *RESTART, READ. Then follow with a new step definition.
  3. Run the first analysis. Rename its .rout file to new_job_name.rin where new_job_name is the name of the input file for the second analysis.
  4. Run the second analysis.
3

I just want to add a step that adds a new layer and that’s it, I don’t need to change anything else.

4

Then you can continue with restart or just run a single analysis with all the steps. The result will be the same. Restart is mostly useful to continue interrupted analyses or add more steps to already completed analyses (when you decide you want to add some more steps or when the first step/steps is/are common for each analysis case but subsequent steps vary per case).

5

I already managed to get the “*restart” command to work
But I can’t add a new layer.

STEP 3

*ERROR reading *CHANGE SOLID SECTION:
element set EB2
has not yet been defined.
*ERROR reading *CHANGE SOLID SECTION. Card image:
*CHANGESOLIDSECTION,MATERIAL=ASTM_A36,ELSET=EB2

ERROR in calinput: at least one fatal
error message while reading the
input deck: CalculiX stops.
MY INP:
RESTART, READ
include, input= Eb2.msh
STEP3*****************************

*STEP,INC=100000
*COUPLED TEMPERATURE-DISPLACEMENT
0.005, 16.395,1e-5, , 0.1
*CONTROLS, PARAMETERS=TIME INCREMENTATION
12,16,9,50,20,4,5, ,
*CHANGE SOLID SECTION,MATERIAL=ASTM_A36,ELSET=Eb2
**Convection based on all
*FILM,OP=NEW
*INCLUDE,INPUT=Eb2.flm
** Radiate based on there
*RADIATE,OP=NEW
*INCLUDE,INPUT=Eb1.rad

** Inhomogeneously flux based on all
*DFLUX, OP=NEW
**EFirst, BFNU, 1
Eb1, BFNU, 1
**
*OUTPUT, FREQUENCY=1
*NODE PRINT, NSET=Nall
N.T.
*NODE FILE
N.T., U.
**
*THE FILE
HFL, S, PEEQ
*NODE FILE, FREQUENCY=1
N.T.
**
**
*END STEP
**

6

You have to define that ELSET named EB2 in the model.

7

It is, inside this include file, input= Eb2.msh