stress analysis contract type for parts that are connected by screw

[nivenl]

Hi, 

I'm new to stress analysis in inventor. Imagine there is a rectangular plates and a solid cyclinder . They are bolted together by 4x 1/2 -13 screw. The oder end of the cyclinder is subjected to a pulling force, while the other end of the plate is fixed. For the contact between the plate and the cyclinder, which contact type should i use? Bonded or seperation ? and why?

Any help is appriciated.

[blair]

Can you post a picture or screen shot of what you want.

[nivenl]

Something like this. What I want to know is what is the best contact type for the face where the cylinder touch the square piece. 

[blair]

Do you really need to do FEA on this? It's a rather simple axial load on the four bolts unless there is something with the inside of the cylinder or other end that is not shown in the picture.

[karthur1]

 Are you trying to analyze the 4 bolts that connect the two pieces?

[nivenl]

yes, this is a simplification.  I really can't show you the assembly, so I quickly make something up that are similar to what I am trying to analyze. 

Imagine if you have a bigger assembly, with parts and are screw or bolt together. How would you know which type of contact to specify between parts to give you the most accurate result? 

[blair]

I might move it into Simulation Mechanical or Dynamic Sim if I have a number of parts and movement (force and vector) and I am dealing with more complex dynamic loads.

I could just constrain the bolt hole and apply a force load on the end of the cylinder to analize the cylinder if all load/force vectors are axial.