Ansys Employee

Hello Svenja,

Boundary conditions are very important when you perform an FEA analysis. This link provides information for all the available BC in Ansys Mechanical which may come useful while simulating a problem. 

More specifically, because I understand you want to enforce a specific rotational angle I would reccomend using Remote Displacement BC . If this doesn't work for you, check the list of BC on the first link to see which one simulates best your problem.