AnsweredAssumed Answered

Equation for Bolt Pre-tension

Question asked by Alessandro Tornincasa on Mar 8, 2011
Latest reply on Mar 8, 2011 by Anthony Botting

Hi,

SolidWorks Simulation has bolt connectors, in which you specify Bolt Pre-tension. Behind the curtains, SolidWorks Simulation applies a thermal load to the bolt, in order to make it shrink and exert an axial force on the fastened parts.

 

I was wondering if there is a formula somewhere that relates thermal load you need to apply and axial force you want to get. I need to simulate a real bolt and I'd like to get my bolt pre-tension right the first time, without trial and error.

 

I found something here, but it's not convincing:

http://www.engineersedge.com/thread_strength/thread_tension_heat.htm

 

Thanks,

 

Alessandro

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