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I have a problem of material discontinuity in solid mechanics of composites.

I've solved the problem separating the domain of each material, and I have 2 sub-problems joined because of the discontinuity interface between materials. In every point belonging to the interface, I have 2 results, one for each material.
The problem is, when I have to plot, every node has an ID and a result associated, so until now, I only give one of two results, and in consequence the program smooths the result in discontinuity lines, when discontinuity is like a step function.

I've attached 2 images, one is the result I got plotting as usual in GID. The second is a result from ansys that shows the abrupt change that I want. The problem is circular fiber inside a square representative volume.
So if I could put two results in the same point... it would be nice, but it is possible?

Thank you very much in advance.

I have my problem solver. The solution is to descolapse both surface, so the line of discontinuity is double. Then, there is a node for each domain. When the problem is solved, the program can plot the two material correctly.

I just came across the same problem. Can you please share a sample or explain more. for each material I can define its own submesh
defined in post.msh file. I also get for each submesh a solution value for each node. How does the post.res file look like? Gid should not
so smoothing across material interfaces.
Thanks

you must not define two values of a result for the same node,
you mus simply have two different nodes, each one with its unique number (they could be in the same x,y,z location)

escolano wrote:you must not define two values of a result for the same node,
you mus simply have two different nodes, each one with its unique number (they could be in the same x,y,z location)

That's so simple. Why didn't I think of that… Thank you.