As a simple FEA experiment I would like to analyze a bolt-lug connection. To do this I’ve created an assembly in 123D Design (Autodesk) and exported it as an STL file. Unfortunately, after importing the file into SimScale the bolt and lug are disconnected again. Does anyone maybe know how I can make sure that the assembly is imported properly in SimScale? When creating the assembly in 123D Design I’ve used the “align” method, not sure whether this is the proper way of assembling components?