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The IIW-1823-07 "IIW Recommendations for fatigue design of welded joints and components" specifies the use of quadrilateral elements if solid elements are to be used for stress evaluation using the hot spot approach. So right now, only shell models can be analyzed in Inventor Nastran using the hot spot approach, and not all types of structures are efficiently modeled using shells.
Coming from the ANSYS world, I find it somewhat surprising that quad elements are not available by now. However, I'm even more surprised by the lack of response from Autodesk on a topic that has now been debated for 5 years
Yes, here is some feedback. The federal regulators in the United States frown upon public companies making statements about future plans. If I or someone were to say "we are working on it", and if you renew your software based on such a statement, Autodesk could be fined and I could go to jail. (Well, maybe not jail, but it is a serious matter.) This is my understanding of all the training we receive on a regular basis.
It makes no sense to have two stress analysis tools embedded within the CAD environment where NASTRAN's capability is severely limited. It is quite possible that Autodesk is taking FEA to the cloud or going meshless in the future. Fancy, colorful pictures on the fly.
We need hexa elements Autodesk. Do not ignore or avoid your customer’s voice. Moreover, allow the import of meshes created externally to inventor and furthermore work on importing CFD results to Inventor NASTRAN from external solvers. It is super easy in 2022 to do that. Do not neglect our needs as designers and analysts.
There seems to be a possibility to use CHEXA elements with the Inventor Nastran solver. It's just that you need a third party prepost as you can't use Inventor for that
I recently asked this question to a former Autodesk Support AE...So how would people benefit from adding Femap to ADSK Nastran. "The biggest difference is that Inventor is a much more limited interface that restricts you to a selected collection of Nastran capabilities. Femap plus any Nastran gives you access to many more of the Nastran capabilities."
I have been pushing for this for years. The best thing is to get Femap and use it with Autodesk Nastran. Femap recently added a great hex dominant mesher and its nearly bullet proof. You don't need any of the NX solvers so it's much cheaper and it will mesh across multiple solids if you want that. If you were to add the equivalent solver capabilities that Autodesk Nastran has it would be very expensive but just adding Femap is not and it will run with the Inventor Nastran solver even better than it does with NX Nastran. Direct message me if you want more info.