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How to generate a neat input file from CAE?

How to generate a neat input file from CAE?

How to generate a neat input file from CAE?

(OP)
Dear everyone,

I am wondering how to generate an input file from CAE without part/instance/assembly, just like the example input file provided by AQAQUS help?

Are there more example input files avaiable on how to define fluid-filled cavity?

Thanks in adavnce

RE: How to generate a neat input file from CAE?

(OP)
Thanks Martin,

How about modeling fluid-filled cavity? Any suggestion?

I just got ABAQUS V6.5 a few week ago. So more examples on the modelling of fluid-filled cavity would be very useful for me.

Best,

Yiling

RE: How to generate a neat input file from CAE?

Hi Yiling

Not done much fluid cavity modelling meself, so I don't have a lot to contribute

The manuals and the HTML docs are pretty good for most things.  I seem to remember that the air-spring example is a good one for a fluid cavity inside a deformable object.

Does CAE support fluid cavity elements yet?  I fear not judging by your initial request....

Martin

RE: How to generate a neat input file from CAE?

(OP)
Hi, Martin

You are right. CAE doesn't supply the definition of fluid cavity. Following your suggestion, add
print_flattened_file=ON
    def onJobCompletion():
    import os,osutils
    if os.path.exists('%s_f.inp' % id):
        src='%s_f.inp'%(id)
        dest=savedir
        osutils.copy(src,dest)

into the environmental file (ABAQUS-v6.env), I got the succinct (or flattened) input file.

Based on this input file, I add the definition of fluid cavities:

*physical constants, absolute zero=-273.16, universal gas constant = 8.314
*fluid cavity, name=fcavity, behavior=gas, ref node=1000,surface=ASSEMBLY_SURF, ambient=1.0136e+5
*fluid behavior, name=gas
*molecular weight
0.044
*capacity, type=tabular
30

But this doesn't work in ABAQUS, the dat file generated by ABAQUS suggests:

  *fluid cavity, name=fcavity, behavior=gas, ref node=1000,surface=ASSEMBLY_SURF, ambient=1.0136e+5

 ***ERROR: NO DATA CARDS PROVIDED FOR *FLUID CAVITY


          THE PROGRAM HAS DISCOVERED     1 FATAL ERRORS

               ** EXECUTION IS TERMINATED **


Any comments will be appreciated.

Yiling


                              END OF USER INPUT PROCESSING

RE: How to generate a neat input file from CAE?

Hi Yiling

Just a thought, but should the line;

*fluid cavity, name=fcavity, behavior=gas, ref node=1000,surface=ASSEMBLY_SURF, ambient=1.0136e+5

actually read;

*fluid cavity, name=fcavity, behavior=gas, ref node=1000,surface=ASSEMBLY_SURF, ambient pressure=1.0136e+5

Martin

RE: How to generate a neat input file from CAE?

try the following command in the  the command line editor in CAE

>>> m = mdb.models['Model-1'].setValues(noPartsInputFile=ON)

(assuming 'Model-1' is your model name)

harry

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