topic Re: Frame analysis - theory of stress calculation in Inventor Forum

Frame analysis - theory of stress calculation

krystia3n — Wed, 28 Feb 2024 09:02:52 GMT

Good morning everyone,
Recently I was wondering how the Frame Analysis Module calculates the maximum/minimum normal stresses (Smax/Smin) for a given beam in the analyzed frame.

According to my knowledge, the value of normal stresses should depend on bending and tension, i.e.

Smax=sqrt(Smax(Mx)^2+Smax(My)^2)+Saxial,
Smin=sqrt(Smin(Mx)^2+Smin(My)^2)-Saxial

Unfortunately, based on these formulas, it does not receive the Smax or Smin values given by Inventor. Does anyone of you know how the program calculates these values and how to calculate, for example, reduced stresses (Von Misses) for beam 6 based on the charts we received?

Re: Frame analysis - theory of stress calculation

CGBenner — Wed, 28 Feb 2024 12:09:42 GMT

@krystia3n Welcome to the forum!

@JDMather Do you have any thoughts on this one?

Re: Frame analysis - theory of stress calculation

JDMather — Wed, 28 Feb 2024 18:49:16 GMT

@krystia3n

Can you Attach your assembly here?

Re: Frame analysis - theory of stress calculation

krystia3n — Wed, 28 Feb 2024 20:04:17 GMT

Dear @JDMather

as you asked, I attached the ZIP file with the project and assembly entitled 'Rama podestu-obliczenia.FEM.ipt'.

There you can find the frame analysis results.

Best regards,

Krystian

Re: Frame analysis - theory of stress calculation

JDMather — Thu, 29 Feb 2024 12:54:57 GMT

@krystia3n

Your zipped file has an enormous amount of stuff that isn't relevant.

When zipping skip these folders...

Re: Frame analysis - theory of stress calculation

krystia3n — Thu, 29 Feb 2024 19:44:17 GMT

Dear Sir @JDMather ,

sorry for not submitting relevant files.

I have reduced their number.

I hope that now the project will be more understandable.

Re: Frame analysis - theory of stress calculation

CGBenner — Mon, 04 Mar 2024 11:36:34 GMT

@JDMather Good morning. Have you ben able to have a look at these files?