How to generate a neat input file from CAE?

[ylu]

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

 

[bassmanjax]

http://abaqus.custhelp.com/cgi-bin/.../std_adp.php?p_faqid=781&p_created=1043188923

Martin

 

[ylu]

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

 

[bassmanjax]

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

 

[ylu]

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

 

[bassmanjax]

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

 

[harry123456]

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