Fatigue ('Durability') process available with non-3D meshes?

[potrero]

NX6.0.1.5 MP1, Advanced Simulation

Is it possible to conduct fatigue ('Durability', in NX-speak) evaluations with FEM's composed of 2D meshes, rather than 3D elements?

Running a quick test with a 2D FEM seems to indicate this isn't possible (solve fails, indicating a problem with the XML input deck).

 

[JohnRBaker]

I suspect that this has more to do with which solver you're using as apposed to how the model was meshed.

But that being said, while I've personally never done any FEA-based fatigue analysis, I can remember back when we used to draw Mohr's Circles and calculate fatigue life based on the frequency that loads were varied, if I recall correctly, we had to look at these as 3D problems so it just might be that 3D (solid elements) are a prerequisite to using codes which can predict the fatigue life of a model under cyclic stresses.

John R. Baker, P.E.
Product 'Evangelist'
Product Design Solutions
Siemens PLM Software Inc.
Cypress, CA

http://www.siemens.com/plm

http://www.plmworld.org/museum/

To an Engineer, the glass is twice as big as it needs to be.

 

[potrero]

hmm, taking this a step further, running fatigue ('Durability') on models composed of solids (tets) connected with RBE3's does not work either (same XML error as the sheet model).

Here's an excerpt from the Analysis Job Information report:
Fatal Error
--------------------------------------------------
Problem with the XML input deck.

 

[JohnRBaker]

Sounds like a formating problem. You will probably need to contact GTAC and have someone in development look at your input deck.

John R. Baker, P.E.
Product 'Evangelist'
Product Design Solutions
Siemens PLM Software Inc.
Cypress, CA

http://www.siemens.com/plm

http://www.plmworld.org/museum/

To an Engineer, the glass is twice as big as it needs to be.