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title : Question regarding multi-material simulation
1 Attachment(s)
Hello to all solid4Foamers,
Currently, I am doing a simulation of a bimaterial specimen deforming on a plate. The specimen is composed of a very soft material with a very hard insert [more information regarding the mechanical properties bellow]. The case is defined below: https://i.imgur.com/G41GWcR.png The definition of the materials was performed via topoSet [OpenFoam v1906] using the stls of the geometry. "To create movement" I am setting a patch on the top of the specimen with a fixedDisplacement time series to move the foot 5mm along the negative y-direction. The mechanical properties are defined with a neoHookeanElastic behaviour and a nonLinearGeometryUpdatedLagrangian solidModel. When I set the material properties of the specimen and insert to be the same, I get a complete simulation. As soon as I set them to have their respective properties, the simulation stops shortly after starting. They have a ~3 order of magnitude difference in their modulus. I will post the dictionaries bellow. My question is: How can I handle this type of simulation with multi-material? Do I need to set an intermediate layer to reduce the gradient of the mechanical properties? Does solids4Foam have anything implemented in this regard? Does anyone have any experience with multi-material simulations? |
Hello Ramoa,
That is an interesting question, indeed... I am also trying to simulate some multi-Material cases and I am having problems when I set up two materials with a huge difference in elastic modulus (steel and rubber). It would be great if someone could give some insight into this issue... best of luck =) |
Quote:
Hi there There are a few multimaterial tutorials which I have been studying and seem to work fine. Look at the solid folder on this link: https://github.com/wyldckat/FluidStructureInteraction Regards Francisco |
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