Contact tangent displacement sign reversal

PaulFlynn

I'm doing a shrink fit calculation on a shaft. The sign of the tangential displacement changes sign when the position crosses the x axis. Is there way to prevent this?

Victor

From the CCX manual, the direction of the 1st tangential direction is "the normalized projection of a vector along the global x-axis on the master surface. If the global x-axis is nearly orthogonal to the master surface, the projection of a vector along the global z-axis is taken"

Your sign change happens at the transition between those two cases so I think you could make it smooth by rotating the model so, say, the axis of the cylinder is parallel to X.

Or you could make a formula to combine the 2 tangential displacements into a single displacement magnitude in the plane of the master surface, and that would be independent of the surface orientation.