Welcome to 3DCADForums

Join our CAD community forums where over 25,000 users interact to solve day to day problems and share ideas. We encourage you to visit, invite you to participate and look forward to your input and opinions. Acrobat 3D, AutoCAD, Catia, Inventor, IronCAD, Creo, Pro/ENGINEER, Solid Edge, SolidWorks, and others.

Register Log in

Problem with Solidworks Simulation Bolt Feature


New member
Hello Everyone,

I am trying to model in Solidworks Simulation a connection between different steel structural elements with the bolt feature (counterbore with nut).

I have created three models all with the same contact behaviour-(no penetration), but different load and pre-load (for the bolts) conditions:
The first model: a Vertical load and pre-load in the bolts of 100 N.m;
The second model: only a pre-load in the bolts;
The third model:a vertical load and no pre-load;

My doubts with the results that i am obtaining are the followings:
1-Why do i have compression in the bolts (axial loads) for the first and third model (in the bolts positioned in the middle of the connection)? The bolts should only work in tension (tension beam element).
middle bolts.jpg

2-My other question is related with the case where the bolt is connecting more than two elements, like the edge bolts, i am using the advanced option from the bolt feature, and selecting all the internal faces in contact with the bolt, am i doing it right?
edge bolt.jpg

I am attaching the Solidworks model:

Thanks for the help.