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semih balci

Negative Internal Energy

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Guest

Hi,

Please check for any initial penetrations in the model and check the starter out file for any warnings.

Also create  time history output for all the parts in your model using /TH/PART and plot the energy curves for each part.

Please double check your material definition to make sure they are reasonable and don't contain any mistakes.

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Hi,

 

I have run this model both with foam and without foam.

ı have seen negative internal energy just in model with foam.

and i want learn that negative internal energy on foam is important problem or not ?

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Guest

Hi,

If its from the material, then you have to recheck the material parameters especially the curves defined for the material (loading/unloading curves for foam).

 

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