Non Linear Analysis : why Do I get such High stresses??

Hello all,

I made this study :

I impose a rotation to the wheel. Computation seems correct and I get a stress that goes up then down then up again....for every tooth.

But where I impose my motion , I get a stress that goes up and up.... see picture.

I really don't understand why. Any idea?

Thanks

Loïc

SolidworksSimulation