12 August 2019

FAQ 003470 EN

Thomas Günthel

Modeling | Structure


What is the best way to transfer the force between solids and surfaces?


Since a surface is a 2D element and therefore the transition from surface to solid is a line, singularities may occur here. Especially the moments m-y and m-x may cause some problems.

The best way to create the transition consists in using rigid members, as shown in Figure 1.

In this option, the rigid members cover the height/thickness of the surface and thus ensure that the moment is introduced cleanly into the solid. Additionally, the rigid members must protrude into the surface; the depth has been selected to be half of the surface thickness.

Figure 2 shows the calculation results. The model without the rigid members has a large deformation, which illustrates the effect. The model with the rigid members, however, shows in some cases the same deformation as the pure surface model or solid model.


Modeling Volume Surface Transition Singularity


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