How can we simulate screw joint in autodesk mechanical... In 'CAD additions > generate bolt connection' there is an option for bolted connection without nut and grounded bolt, can we use this? And the two parts joint by screw connection have to be surface contact or bonded. Also, do we have to set any contact beween the screw and parts to be joint?
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A screw would be simulated as a "bolt without a nut". (Now that I think of it, the wizard/dialog should be called a "fastener" instead of a "bolt", and "tight fit" should be "threaded".) In the section where you specify which surface numbers are the interior surface of the hole, you would click the "tight fit" checkbox next to the surfaces where the threads are located. This ties the bolt shank to each node on the surface, as if the bolt/screw threads are threaded into the surface. Please see the page "Bolts and other fasteners" in the online Help.
As for the type of contact between the parts, you set that based on how the parts interact in the real situation, or what ever type of contact is acceptable for the simulation. The contact between the parts is not affected by the bolt. And since you cannot define surface contact between a line element that is used for the bolt and the solid part, you cannot set that to be surface contact. :-) Your options are either free contact or bonded.
16 years experience with Simulation Mechanical