5. Summary of results

This test makes it possible to validate the touch-friction against references given by commercial calculation codes (Abaqus and MARC).

Good agreement with the reference results is observed. However, it is important to note that the meshes used by the Aster calculations are different from the benchmark meshes: the latter had the particularity of not being compatible (for a cylindrical contact this means either an initial interpenetration or an initial non-zero game). However, in the presence of curved contact, this type of mesh leads to strong oscillations (for example on pressure due to an alternation of contacting and non-contacting points) which can only be avoided by using advanced functionalities (splines, repositioning nodes). These features are currently not available in Code_Aster.

In quadratic, the contact pressure obtained from the degree of freedom LAGS_C in continuous formulation has fewer oscillations when the number of points in the integration diagram is increased.