Mapping stress field between different meshes

[islandlad]

Hi all, I'm after some advice on how best to map a stress field coming from one mesh to a different mesh.

My aim is to simulate a continuously growing body (achieved through a dummy thermal load) embedded within another body. The issue to overcome is the resulting overly deformed mesh. My strategy thus far has been to solve a first load step, then create a new model based on the deformed geometry from the first load step, re-mesh, map and apply strains and stresses from the first load step through a combination of MOPER,MAP and INISTAT, and finally re-apply the dummy thermal load to proceed with the growth. And repeat.

This has turned out to be neither the most elegant of approaches, nor one that produces decent results. I've attempted mapping stresses and strains on an element single-value basis, node basis, and integration point basis. The former two both produced unsatisfactory results, while the latter seemed overly complicated.

I'm now wondering whether I'd be better off pursuing a strategy based on underived DOF i.e. displacement.

Has anyone got any thoughts on what strategy might be most suitable for this case?

Thanks!

 

[scheah]

ANSYS has non-linear adaptive region re-mesh ([tt]NLAD[/tt]) that might fit what you're trying to do.


Best regards,
Sze Kwan (Jason) Cheah

 

[islandlad]

Unfortunately NLAD only seems to work for linear SOLID285 elements whereas I'm working with higher order tet elements :/

 

[scheah]

Hi Islandlad,

Simutech just published a nice article on mapping stress fields between different mesh.
[URL unfurl="true"]https://www.simutechgroup.com/tips-and-tricks/fea-articles/384-mapping-stresses-when-using-ansys-mechanical-apdl[/url]