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I'm embarking on starting an electron beam welding company. I've worked as an engineer in gas turbine engines my entire career to date. Metallurgy and joining are fascinating as does seeing stuff come to life. You don't see many welding companies starting up these days. Any advice or...

Initial stresses are applied with the INISTATE command. That's the easy part...knowing what those stresses and/or strains are is the difficult part. ;)

I think it can. If you know the deformed shape w/ 1g of load couldn't you apply a -1g inertial load and solve for the undeformed shape in this manner? The most correct way would be to apply stresses as initial conditions to the deformed configuration of the breast and let the problem find the...

Best thing to do would be to ensure the three volumes (one for each layer) share areas at their interfaces. Volumes that share areas in Ansys will also share nodes since each will have nodes common to that one area. You could use bonded contact if they volumes have their own distinct areas at...

What type of material is MID 18? If it isn't *MAT_SPRING or *MAT_DAMPER therein lays your problem.

How about the E or EN commands? Specify nodes I, J, & K in their proper order then with K being the orientation node.

Writing a batch file to do this is extremely easy. Read this section in the help and you'll see that it's painless and probably easier than creating a queue of jobs interactively.

To be perfectly honest I don't fully understand what you explained above. In your text file I don't see any errors - just notes. Are you sure that you have a problem? If you do try SBCTRAN before solving.

Before you solve or write a *.k file in /PREP7 do the following: CSYS,0 nall nrot,all This will correct the issue. If you need to rotate nodes to create constraints or couples you will need to figure out a work around which is kinematically equivalent. Dyna has many options available. Also...

Dyna only supports nodal coordinate systems oriented in the global cartesian system, or CID = 0. If you provide a better description of what you're attempting that would help us to better help you.

You could try using a finer mesh or reduced integration elements. The later may be especially helpful though accuracy may suffer when severe distortions exist. Otherwise, use a more appropriate tool such as DYNA like rubadee mentioned.

I have a vector: c = [20 25 27]' and want to name another vector by appending the name with an element from the vector c. For instance, I want to name a vector: omega25 = the name consists of the base 'omega' and the second element of vector c, c(2). How can one do this substitution...

Thank you for the suggestions! I ended up using eig(inv(Mc)*K) to solve for the eigenvalues. This worked superbly and is a great work around. I'm programming a finite element eigenvalue solver. I find doing this symbolically keeps things more general and easier to use and book keep.

You have to be much more specific in your question. Certain brick elements can be much stiffer than actuality. For instance, fully integrated 8-node brick elements exhibit shear locking when subject to bending. On the other hand reduced integration 8-node brick elements exhibit low or no...

I have a simple eigenvalue problem I'm needing to solve. I'm using R14. Here is my m-file input: %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% syms A E L p % Stiffness matrix K = ((A*E)/(15*L))*[35 -40 5; -40 80 -40; 5 -40 35]...

I haven't used either in a few months so all the specifics aren't fresh in my mind. Be sure to read and understand the restrictions and recommendations listed at the bottom section of the help file for each element. Also, as with all elements it pays to familiarize yourself with the...

SHELL181 and SHELL281 are the most recent structural shell element types. Read the help on each and decide for yourself and your application. Both are excellent in my opinion.

You have to select the structural elements associated with the nodes as well! Only select elements on one side of the section though. For instance: nsel,,,,beamsectionnodes esln

Aconnell, Thank you for the head's up about APEGGA. Unfortunately, I have not worked under a licensed PE here in the US. When working in the aerospace/defense sector here a PE in most companies buys no added merit so few people seek them. Moltenmetal, I am not married to a Canadian citizen...

SNORGY, Much thanks and a star for your last post. Recommendations like that are exactly what I'm looking for! :-)