welds and stress analysis

I think it is more complicated problem (contacts between parts and not the same material of parts and welds) but if you really want, you can.

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Welds are very difficult to analyze unless you know the residual stress remaining after the weld cools. You may also need to use contact if there is a space under the weld as frequently happens with fillet welds. Neither Cosmos Xpress or CosmosWorks are particularly well suited to this.

"solid mechanical analysis", see FEWELD from weavengineering

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It is interesting that it seems to work only with Cosmos/M and Ansys. I think that is because they expose nodal results for individual shell elements.

We use FEWELD since 4 years. With large models meshed with shells, we can add a mechanical analysis of the welds according to AWS standards. It's an opened software, we have already modified it to be compatible with french standards for example. We hope to have it on cosmosworks.

Please vote to have it available in CosmosWorks.

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And NE Nastran