Recent content by jerza

My mistake.http://files.engineering.com/getfile.aspx?folder=d5c831bc-d58f-4d03-852a-a4b0a80d4a84&file=a1.jpg

Because I'm Czech too and we can discuss your problem in our nation language and put here only the solution in English if you want. I attach a file to contact me.

Hi, I have been in similar problem recently. But I was in the time pressure due the tender so I did it as the static analysis only and I didn't really figure out. So your model is piston->connecting rod->crankshaft right? How look your boundary conditions (constraints)? P.S. Can I ask you...

Hi! In fact I don't really understand what are you trying. What does it mean "shaft with one force applied?" Where does the force apply? Contact with what? You choose SOL601 why? Obviously your errors it's warnings. And if you translate them it means your node (in fact 3269 nodes) has degrees...

Supposed you are using Femap with NX Nastran :-)

Hi, I just read Element Library Reference for NX Nastran (for me v8.5). There is a describe of the axisymmetric solid elements on page 141. 1. The recommended axisymmetric elements CTRAX3, CQUADX4, CTRAX6, and CQUADX8 support all capabilities of the elements described in categories 2 and 3...

Hi, yes you are right. I'm interested, could you share your problem in more detail?

Hi, if the results are same it doesn't mean that the second one is wrong. I suggest create a simple pull beam a check the result for each type of the material. Something like here.

Hi, if is model a bit simple, I used bonded contact between plates (shell) and bricks mention here.

tell me...

Hi, I use shell without stiffness. I have boundary conditions (load and constraint) applied on the geometry. I mesh the geometry with linear plate element (cquad4) and do solution without error. Instead linear plate element I want to use parabolic plate element (cquad8) to mesh the geometry...

Model is fully constrained. I checked it in the solution with the linear elements (CQUAD4). For the parabolic elements (CQUAD8) I changed "maxratio" by the output in .f06 file (where is the max value of maximum ratio of matrix diagonal) to 0.5e7 and solution went through. Results like stress...

I forgot I use Femap v10.3 with NX Nastran v8.0.

Hi, I've got a simple mid-surface geometry of excavator bucket. I applied load a boundary conditions. For my first approach I used linear plate elements (CQUAD4) so I see if my model is right. But when I used parabolic quad elements (CQUAD8) for better results I've got an error (FATAL MESSAGE...

Thanks that's what I want to hear. I wasn't sure and now I'm a bit clever. One more time thanks. Regards JK