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Cosmos Express

Cosmos Express

Cosmos Express

(OP)
Is point load possible?

RE: Cosmos Express

No, but you could put a very small cut feature on the surface you want the point load.  But IMO, that would not really yield the results you might be looking for.  Cosmos Works does point loads.

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Heckler
Sr. Mechanical Engineer
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Do you trust your intuition or go with the flow?

RE: Cosmos Express

(OP)
That would work perfect, man I should have thought about that.

RE: Cosmos Express

Another option would be a small, circular split curve.  This would give you a tiny face to apply the load without adding the vertical cylindrical face you would get with a cut.

RE: Cosmos Express

Make the face too small and you may get errors, including "failure to mesh" and "load transfer failed"; you may have erroneous results even without a flagged error report.

RE: Cosmos Express

Is not advisable to use "point loads" since you'll get unrealistic high stresses (spikes). You can split the surface and apply a surface load.

RE: Cosmos Express

You can fake in a point load as has been mentioned. Yes it will cause high stress in the area it has been applied to. But St. Venant's Principle says that the effects of that high stress will vanish some distance from the point load. Therefore, the stresses far from the point load should be usable all other things being equal.

But, all other things are not equal. The real concern is that it is not a "real" point load applied to a node, but rather one or more highly misshapen elements to which a pressure load is applied. This can cause numerical problems in the solver. Since CosmosXpress does not allow mesh refinement studies you won't really know whether the model has converged or not. So the results may not be trustworthy.  

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