topic Re: Stress testing simple plates with bolts in Inventor Forum

Stress testing simple plates with bolts

Stian — Fri, 11 May 2018 11:04:40 GMT

Hi. I am doing a test on 2 pcs. 20mm S355 steel plates, with 2.pcs 25mm lifting eyes, OD25mm bolt, bolted together with 4 pcs. M16 bolts with washers and nuts on both sides. This is clampet together on a Square tube 200x200x8mm.

I cannot seem to get correct results, ie something that looks correct. I cannot upload the drawings due to job.

Do I need to draw real threads with nuts? Or can I just make a straight bolt like Ive done now, and fix constrains around bolt holes?

Re: Stress testing simple plates with bolts

TheCADWhisperer — Fri, 11 May 2018 12:46:49 GMT

Which part(s) are you attempting to analyze?

I do not see any need to analyze any of those parts as assembly - they can be analyzed separately.

What do you want to know about the analysis?

That does not look like proprietary work - I could reproduce from your image.
Can you post a simple equivalent assembly that does not include proprietary design, but represents the same sort of geometry?

What version of Inventor are you using?

You would never model real threads for analysis.

Re: Stress testing simple plates with bolts

Stian — Mon, 14 May 2018 20:48:38 GMT

I am using Inventor 18.

Trying to test the hole assembly, without the square tube.

I am wondering about convergence. Tried with std. settings, then 3 h-refinement and 3%, then 4 and 4, 5 and 5.

Convergence-rate should be what? 60? 20? 2%?

kelly.young has embedded your images for clarity.

Re: Stress testing simple plates with bolts

kelly.young — Tue, 15 May 2018 17:48:04 GMT

Hello @Stian if you can attach your parts with Pack & Go for forum members to inspect that would be helpful.

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