Joe: Thanks. Sincerely, Ewen ------------------------------------- Message: 2 Date: Wed, 14 Feb 2018 12:34:04 -0500 From: "Metrisin, Joe (FTTINC)" <JMetrisin@fttinc.com> To: XANSYS Mailing List Temporary Home <xansys-temp@xansystest.info> Subject: Re: [Xansys] Xansys-temp Digest, Vol 30, Issue 10 Message-ID: <C0D640101968F5469CD2999646A22A7FBE521DB174@FTTJUPXVS01.fttinc.com> Content-Type: text/plain; charset="us-ascii" Ewen, If you want access to element stiffnesses and such, you'll probably need a "user programmable feature". This would be the nearest thing to NASTRAN DMAP. You can compile and link a custom Fortran or C++ routine to do whatever you want. In the manual, look at the programmer's reference or "User programmable Features". There are a number of user subroutines provide that you can start with. It's not for the beginner though. -----Original Message----- From: Chan, Ewen (E.) [mailto:echan17@ford.com] Sent: Wednesday, February 14, 2018 12:15 PM To: xansys-temp@xansystest.info Cc: Chan, Ewen (E.) Subject: [FTT_SPAM] - Re: [Xansys] Xansys-temp Digest, Vol 30, Issue 10 Joe: Yeah, but that's where I got lost in trying to learn how I would need to make that happen using APDL. I couldn't find the documentation that would give me access to the stiffness matrices of the structure so that I can compute U' (and I also struggle a little bit with the math to be able to extend it from the 2D case that is presented in Pejhan's dissertation to an arbitrary 3D structure that uses an unstructured tetrahederal mesh). Again, referring to the MSC FASTUSTAR (Source: http://pages.mscsoftware.com/rs/mscsoftware/images/NastranUserMeeting-MSC-Ustar.pdf), MSC.NASTRAN uses DMAP. I am not sure what the ANSYS APDL equivalent of MSC.NASTRAN's DMAP is. Any help would be greatly appreciated. Thank you. Sincerely, Ewen