I am trying to load a bolted structural model and assign pre-tension to the bolt. I have made a spring element connected between two solid parts of bolt. I can see that pretension can be assigned using spring 13 property and also type 32 spring property. In type 32, what so we mean by Stif0 value? Also how to assign pre-tension using both?
So is it -3 mm displacement at 0 kN force . Does not this look like any problem in this?
If it is displacement with time, then at t=0, it under with pretension of 3 mm and then as time increase bolt loosens .This seems ok.
Kindly clarify .