Inventor Mechanical Analysis - Plotting stress over plane, line, etc.

[carles_colls]

Hello, I'm new to inventor and its enviroment.

I'm trying to plot the stress over a direction/line of a simple mechanical simulation of a rotating disk to compare it to analytical results.

I'm unable to find a way to extract or plot such values.

I'm trying to plot the radial tension over radial direction (sigma(r) over r) to chech if my boundaty conditions are ok.

(Simulation attached)

Any hint on how to plot such values? (or make any kind of plot?)

Thank you very much!

[JDMather]

@carles_colls 

I might not understand the problem description, but I suspect you will want to be in the Environment>Dynamic Simulation.

The learning curve is steep.

If I follow correctly it would be a combination of Dynamic Simulation and Export of Time Steps to Stress Analysis.

[carles_colls]

No, the simulation seems to be ok. Its just a disk rotating at constant speed and you want to know the radial and tangential stress due to centrifugal forces.

The problem, for a disk, has an easy analytical solution (stress in [MPa] vs. radius [m], radial, tangential and Von Mises). The figure shows the analitycal result for a disk at 10krpm.

What I'm trying to get, from inventor, its a similar set of data. If possible, in polar coordinates. If not I'll do the conversion myself.

The goal is:

1. Check if boundary conditions are correct.

2. Have a method to gather that information in non-trivial rotating shapes (the ones I'm working with).

I thought I would be able to use a plane or cut, or a line to gather the data from there, but I got no luck so far.

I'm installing Nastran for Autodesk Inventor right know to see if there are some additional tools there.

 

[carles_colls · Accepted solution]

So far I've been unable to find the equivalent tool in regular Inventor Stress Analysis as the one provided in Inventor Nastran: the Stress Linearization. With this tool you can "plot" the values of tension over a line wherever you want.

Here is the link to the knowledge base:

https://help.autodesk.com/view/NINCAD/2023/ENU/?guid=GUID-7F2C9CF2-E809-4716-9D09-992A306B75A5

You can get stress in a recalculated set of directions (N,T,H) defined by to points:

Remember to define the reference point far away to reduce fe noise.

I find this a basic tool for mechanical analysis. If there is an equivalent or another way to get slices or plots please let me know.

I wanted to add that the tool requires some work on on the export chapter.

Be aware:

Division: adds divisions, it means you'll have n+1 points on your plot and the export data.

I recommend to use a python or similar script for the exported data.

1. because the first rows have a different format and excel have troubles recognizing the structure.

2. data separator for tension rows is "coma plus space".

I'm using version 2022 R1 so maybe that have been fixed in current releases. I gave up on regular stress analysis in inventor. If 2025 or so implements this feature please comment, if not, please autodesk, having numerical values over lines, arcs, surfaces or planes, etc. is a basic feature for proper FEM post processing and analysis.