For this demonstration, I show you how to get started using the Stress Wizard. Each time you run the the wizard, a full set of FEA data, including mesh, solution, problem parameters, etc. is generated. These can really add up! Starting in a folder helps keep you organized and it makes this data easy to find and clean up once you have results. You can open these files in the NX Advanced Simulation Package to expand upon the problem or get more detailed results.
STEP 1. SAVE YOUR PART
First, save your target part into a folder where you can work with it. Make a copy, or use “Save As”.
STEP 2. PREP YOUR MODEL
In this model, I want to apply a force to understand where stresses will concentrate. The Simulation Wizard wants edges, faces, etc, for this purpose so I’ve used “divide face” to make a place to apply that force.
Here, I’ve picked Aluminum and selected my solid. Press “OK” to assign that material.
Some questions we may want to answer:
What happens when the force is applied and how does it vary when the forks are connected differently?
What impact does a fillet having on the connection portion of the forks?
FIRST, BASELINE- NO CHANGES
Choose NX CAE Stress Wizard.
(look for the rainbow and magic wand icon).
1. Select a solid model. Once you’ve picked it, the green button indicates you can proceed.
Loads are your forces that will be applied to the model. For this one, I’m going to put 100 pounds/foot on it. This screen has both loads and constraints on it- you can do both from here (like I will show), or just do loads and move to the constraints screen.
Two things need definition for this model.
A. Apply force to the zone identified by the divided face above:
And a close-up:
If you didn’t apply material to the model, you can do so here. The material defined for this model is shown:
You want a minimum of two elements across the thinnest portion of the model. Be conservative with meshes, the compute time rises with the square of the mesh count!
Here is the completed mesh:
You will get a blue NASTRAN window like this:
6. RUN REPORTS, VIEW RESULTS
You can use print screen to capture the images you want. Optionally, you can allow NX to generate the report automatically.
Here are a few screenshots from my model:
Here’s another run with a fillet around the solid connecting the fork:
Thanks for reading,