Is it possible to define different stiffnesses for tension and compression between two surfaces in the diagram of a line release?

Answer

It is possible to define different properties in the tension and compression area of a line release as shown in Figure 01.

However, it is necessary to consider a special feature regarding the released surface when releasing lines between two surfaces. The attached model involves an identical line release. The bottom surface 1 is released for the left model, but the top surface 4 for the right model. For both surfaces, the local y-axis of the surface is aligned parallel to the global z-axis.

The deformation diagram results in completely different deformations for both models.

In the left model with the lower released surface, the pressed area is very soft. For this axis orientation, the reaction force of surface 2, which presses surface 1 from above, is very soft.

In the model on the right, the upper surface is released, so that the reaction force of surface 4, which presses surface 3 from above, is very stiff.

Keywords

Reaction force Action force Diagram Stiffness

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