Hi,

Is there a way to ignore bolt preload when SW calculates its Factor Of Safety. For example, on an M10 bolt I have applied a ~45,000N preload, with a desired FOS of 2. The applied load on the joint is small (~100N). When Simulation reports the connector's results, it says its FOS is just above 1. This is becuase it considers the tension due to preload when calculating the FOS. In reality, a M10 bolt would have lots of FOS on such a small load. If the preload is reduced, bending moment in the bolt will increase because the joint would separate. Is there a way to apply the preload but remove it from the FOS calculation? The only work around I know of is to multiply the applied force (and friction coefficient if shear is present) by the desired FOS - then make sure the axial force does not exceed the preload. There must be a better way...

Thanks

Check this out: https://forum.solidworks.com/community/solidworks_simulation/simulation/blog/2009/10/15/calculating-preload-for-bolt-connectors