Internal stress resultant

[dimockLMC43]

Hello all,

Does Static Stress Simulation provide a way to compute an internal stress resultant force and moment? Specifically, I am trying to determine the axial load on a rod to help size a pneumatic piston. I managed to get an equivalent answer via reaction forces, but this method is a bit cumbersome - requires freeing up one end of the rod and placing a constraint. I'm hoping there's a way to integrate the stresses in a given plane without altering the model.

Thanks,

Glen

[dimockLMC43]

Here are some details about my use case. For a machine enclosure, I have a hinged lid supported by two pistons (one circled in red):

For the simulation, I removed the bottom half of each piston and replaced it with a constraint:

I was then able to use the net reaction forces at each constraint to determine the load on the piston in order to

optimize the pin locations. It seems like there should be an equivalent feature for integrating the stresses in a cut plane, which would be more convenient than modifying the model and using constraints.

Side note: For this example it would be faster to model the lid as a rigid body and solve for the piston forces in a spreadsheet, but where's the fun in that? (I'm mostly using this as an exercise to learn Fusion a little better). 

 

[TheCADWhisperer · Accepted solution]

This doesn't answer your question directly, but if you have access to Autodesk Inventor Professional - you could calculate this in the Dynamic Simulation Environment.  It the link below - I did as trial and error assuming standard off-the-shelf components, but it could also be set to graph the Unkown Force rather than using trial and error.  (The graph would actually be a curve.)

You might be interested in Timesteps:

9:15

10:50

16:50 

and 

23:00 of the video.

>>Case Study 8.3<<

[dimockLMC43]

Interesting video, thank you! Looks like Inventor would have made this process much easier. The pricing is just *slightly* outside my budget, but this at least confirms I wasn't missing something obvious in Fusion.

[TheCADWhisperer]

Well, I barely know how to start up Fusion, so there could be a technique that I don’t know about.