Finite element analysis and mesh generation with TB

Anybody use TB to generate a FEA of a structure? Are there any FEA programs that use TB?
How about mesh generation?

Comments

Re: biomesh.org ...

jimf & Bob ... Very early this morning I Googled FEA "true basic". The first item was titled "FEA in Biology". The following text looked interesting, and included - This model of a carnassial tooth was generated using a custom True Basic program by inputting a 2-dimensional set of nodes at the model's ...

I visited the site, and it was very interesting. It was also VERY early in the morning, so I didn't dig very deep into the site. Check it out. Regards ... Tom M

Re: 3D FEA ...

jimf and Bob Brannock ... I wouldn't be surprised that if one has the TB 3D Toolkit software package, one could get into 3D FEA.

I wrote just one TB program, FLOATCUBE.TRU, that animated the famous "cut cube" structure in three dimensions simultaneously, and which is offset from the XYZ origin in 3D space. That's the most difficult TB program I ever wrote - and it worked!! Regards ... Tom M

Structure FE in 3D

Bob Brannock
Tom,
Doing a frame in FE 3D adds significantly to the challenge, as one would assume from your comment: "your most difficult TB program" about the rotating cube and there are other problems also, such as six degrees of freedom at a node vs. three for the plane frame and selecting the "best" torsional constants to use for structural sections. The plane frame (or continuous beam) FE program is better as a starting point. Most of the big commercial structural analysis programs rely heavily on FE theory and have visual perks (i.e. rotation of the frame about axes) as well as advances in dynamic analysis (natural frequencies, modal shapes, and response to time dependent loading). The learning curve on these programs is pretty hefty and generally require prior knowledge of the underlying theories of of engineering mechanics. curiously enough a only limited knowledge of Finite Element theory is required to run the programs.
I always enjoy your comments. There were a lot of dandies back on the old forum. I wish John Arscott would finish his texts about Windows programming in modern TB.
In our case a "home made" program is easier to use. Seems you wrote all your own analysis programs yourself ... back in the good ol' days.

Re: sonnetsoftware.com

jimf ... I remembered this morning that my old friend and ex-GE-co-worker Jim Rautio (now Dr. Rautio) built the Subject software company in Syracuse NY a decade or more ago. His expertise is in design of electromagnetic microwave circuits & structures. If you visit his website, sonnetsoftware.com, you can download his free Sonnet-Lite (about 46 MB) software package. It's worth the time to learn about. Regards ... Tom M

Finite Element for Structures

Bob Brannock
Jim,
TB works great for FE analysis of plane frames and beams. Both the math and graphics capabilities are very good for such an undertaking. I wrote one a year ago and the civil engineering office in Orlando uses it regularly. I'm not sure of your background. You'll need some good texts on both subjects, FE and TB. The older Finite Element texts are the best in my experience. All the old TB texts are all that is available.
Drop me an email if you want my favorite references (old but frequently available used). FE was started in structural analysis many years ago and has expanded to many other disciplines. Some of the newer texts are a bit abstract for this old retired structural PE.

Bob Brannock

FEA and your reply to my query

I too have noted that the new texts are a tad more theoretical than I need. I would love to receive a list of any old FEA texts.
I have almost all of the TB texts that are available. Whenever I go to a used bookstore, I look...I have found some really good ones.
I am doing FEA on the biomechanics of the foot/leg in human gait. I have a PhD in physics (35 years ago so I'm rusty) and am a physician/surgeon (now 32 years).
Your help will be much appreciated.
Jim Fisher

Send Me Your Mmail Address

Bob Brannock
Jim,
Send me your email address. I'll dig out titles and authors of the old goodies of early FE structural analysis texts. FE went through a lot of evolution before it settled on the Stiffness Method as more or less standard so far as structures are concerned. However there still are many variations of techniques involved, frequently also called matrix analysis of structures. You are not as rusty as me. I graduated in '56 and got Ph.D. in structures well over 10 years later. There are days I miss the Slide Rule. I'm not familiar with bioengineering as engineering got into that several years later (hot major well after my time). Dover has some later texts on FE on their web site. They've dropped some of the good oldies. Most are too abstract for me as FE has expanded into so many other disciplines, but the price is right. No doubt you are well versed in math.
I suspect what you are doing is more complex than matrix analysis of a typically framed structure that was my interest, but TB will probably do it ... with a lot of patience.
There are a lot of big time commercial programs available. This is getting too long so I'll quit as I tend to get verbose. As you can tell FE and TB are two of my favorite topics. I'm at rbrannock@cfl.rr.com.
Bob Brannock

Tom M.

Bob Brannock
I should have added that the great Tom M. is absolutely correct, as usual.

Re: FEA & TB ...

jimf ... I got interested in FEA in 1997. I have two books on the subject, Finite elements for electrical engineers (3rd Ed) and FINITE ELEMENT METHODS IN ENGINEERING SCIENCE. I haven't seriously pursued the subject though.

With TB's matrix statements & functions it looks like a good fit with FEA. I'll search the net for applications. TB is perfect for mesh generation, even if the matrix elements are complex numbers. Regards ... Tom M

FEA

I will go to Amazon and see if Finite Element Methods in Engineerin Science is there.
Do you have any comments on mesh generation?
Jim Fisher

FINITE ELEMENT METHODS IN ENGINEERING SCIENCE

I just got a used copy. Thanx for your advice.
Jim Fisher