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I'm sorry for my delayed response. The inputs are very helpful. @rb1957 ur tipp for converting MAT2/Shell to MAT8/Shell worked. Thanks a lot!! Cheers!

If I use Linear TET4 and Linear HEX8 I have a compatibl mesh and I can merge the nodes, but If I want to use parabolic Tet10 elements instead of Tet4, due to mid nodes I'm not having the Compatible mesh between two surfaces. I would like to define the contact with out using the Bsurf Cards...

you might have forget to mention memory units while calling nastran.

Does any body know how to convert MAT2 to MAT8 and vice- versa. Thanks!

To be specific :with CFRP-Carbon Fiber Reinforced Plastic

I'm new to composites. If anybody had already some experience in modelling using Composites. Please kindly share it..How to start?? Thanks a lot in advance..

Hello Guys! I got the following warning Msg. Does any body have an idea what does it exactly mean and how to fix it. I know Mode shapes should be Independent. But I don't know how to fix them If the are dependent. Waiting for your tips! Thanks a lot! ^^^ USER INFORMATION MESSAGE 9037...

Do you have any frequency dependent springs? If yes, then the eigenfrequency will differ. Becasue they don't have any influence in Modal Analysis.

Please check whether you have write and read permissions in the folder where you are running your Nastran deck.

Dear all, I have copied*.Dball and *.Master from the other user on to my workstation. And I have used ASSIGN MASTER and DBALL in my DECK. This had resulted the following error: *** USER FATAL MESSAGE 1247 (BIOPNR) UNABLE TO VALIDATE DATABASE FILE FORMAT. DATABASE MAY NOT HAVE BEEN...

Thank you very much for very quick responses. So, I explain in detial to understand my model Completely: Firstly, I have inner and outer temperatures of my combustion chamber. As well as convection heat transfer coefficients. With this information I have done a Thermal Analysis to find out...

I would like to thank first.Then, At room temperature, Its not required to do Analysis, right? because there won't be any stresses or displacements. I want to find out how it behaves at the operating temperature i.e 1000K.

Dear all, I am doing static Analysis of combustion chamber with Temperature as my loading. I considered one special steel as the material. Now, I am in confusion which pysical properties (like Youngs module, Density, Thermal Exp. coeff etc) should I use for the analysis. i.e Properties of the...