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If you only have to review the HyperMesh model and results, then download and install HyperView Player. It's a simple 3D viewer for H3D files that it available for free. If you need to modify and run the model again, then cohoman's advice applies.

The parameters "RIGID=LAGRAN" and "PARAM, INREL, -2" can be used together without issues.

If by that you mean "Does Nastran leave a copy of the OP2 result file in some other directory?", then the answer is no. In some cases a deleted file might still be recoverable (see this article).

It might be possible to write a DMAP Alter that outputs these maxima, but in all likelihood it will be easier and faster to write a post-processing script in a more modern language. My own experience is that Python scripting with Nastran HDF5 result files as input is an especially powerful and...

http://nastranusefulresources.blogspot.de/2008/09/overview-of-sol-106-nonlinear-static.html

I find your question hard to understand. Could you please explain your question more?

The chapter "How Do I Attach Plate and Bar Elements to Solid Elements" of this document (starting at page 69) gives some useful advice.

Hmmm, it might be that the accuracy of stress solutions starts to suffer due to numerical round-off errors when the difference between the displacements and the dimensions of the structure becomes really too large. I don't know though how large exactly the difference has to be before these...

You'll really need to give us more information. What settings did you try thus far? And what exactly do you mean with the deformations aren't 'right'?

The mathematics behind each element limit the types of strain fields that the element is able to represent. Simply put: the ways in which an element can be distorted are limited. Whenever an element does not fully distort as a piece of real-world structure would, then the element is 'too stiff'...

Thanks for the tips!

Glad we could be of help. [smile] I'm still pretty much a novice to DMAP myself, but I've been trying recently to gain some more knowledge on it. Dmapguru's tip was a good one, I didn't know about the internal/external ordering yet. These could be good places to start for learning more about...

It's possible to output displacement results to .op4 output file with a DMAP alter. Put the following statements in the Executive Control section of your Nastran runfile (i.e. put it at the very top of the file): $$ Assign OP4 output file ASSIGN...

I don't know of any way to output more significant digits in a .f06 or .pch output file. I believe it's possible though to get 16 significant digits in an .OP4 output file. But what are you going to use the displacement results for? Are you really sure that you need the displacements in that...

Does anyone here have recommendations for good literature on finite-element modelling of CFRP sandwich panels?

It's also good to make a distinction between Nastran-fundamental shell properties and preprocessor-specific shell properties. The element normal direction and Z1/Z2 directions are definitely Nastran-fundamental properties, but what is called top/bottom or face1/face2 might be preprocessor-specific.

Could you clarify what you mean exactly by 'every completed increment'?

Have you tried specifying a cylindrical coordinate system in your material property cards?

Do you just need a human-readable printout of the displacements with grid IDs? Because in that case it should suffice to write either the command 'DISPLACEMENTS=ALL' or the command 'DISPLACEMENTS(PUNCH)=ALL' in the Case Control section of your Nastran runfile. The former will write the...

What exactly is your ultimate goal? Are you trying to check that your model doesn't have any unintentional constraint effects? If yes, then you can simply use Nastran's standard GROUNDCHECK command.