Pile penetration in multilayer soil using ALE formulation

[R. Zamglai]

Dear colleagues, I am working on a simulation of pile penetration into multilayer soil using the ALE formulation with *ALE_MULTI-MATERIAL_GROUP. For a single soil sphere (layer), the model works reasonably well. However, when multiple soil layers with different properties are defined, the pile interacts only with one of them.

All my attempts to resolve this issue have been unsuccessful. I suspect that I may be misusing *ALE_MULTI-MATERIAL_GROUP. Currently, I have only one operator defined for all soils. Perhaps it is necessary to define several *ALE_MULTI-MATERIAL_GROUP operators — one for each soil layer — and then somehow link them together.

Could anyone advise me on the correct approach to set up this problem?

[l...@schwer.net]

Assuming you have modeled the pile as a Lagrange part, you should be using *ALE_MULTI-MATERIAL_GROUP with *CONSTRAINED_LAGRANGE_IN_SOLID.

 

Each Eulerian material should be listed under *ALE_MULTI-MATERIAL_GROUP as either a Part ID or a Part Set ID

 

Then to couple the Lagrange and Eulerian parts you need

*CONSTRAINED_LAGRANGE_IN_SOLID, in particular the parameter MCOUP. You can use the default MCOUP=0.

 

                --len

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