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Recent content by Theanalyst

  1. Theanalyst

    Datum cylindrical system axis

    Corus, I dont think its necessary to define the cylindrical coordinate system in the input deck before solve to be able to plot a contour of the displacement in a radial coordiante system, just the viualizer is enough, don't you?
  2. Theanalyst

    Bolt Pre tension and joint simulation using ABAQUS/std

    ...since I have posted this message no one has responded, quite dissappointing. Took me a while, but I found out a number of things on my own, the summary of which is below. 1) You do not define contact between the bolt shank and the panel holes. 2) A typical joint has the bolt pulling the...
  3. Theanalyst

    Bolt Pre tension and joint simulation using ABAQUS/std

    Hello, I have modeled a simple bolted joint with 3 parts: two rectangular plates with 2mm holes in the center stacked on top of each other and a bolt with shank of 2mm and a round 4mm head. The top plate has a slightly bigger hole than the bolt shank's diameter hence there is no thread...
  4. Theanalyst

    Yield strength change in welded heat affected zone!

    Hello, yes.. that was the question I intended to ask EElmore. I am simulating the assembly loading conditions for doing a stress analysis because we have had these 'bellows' failing left and right and some might have lasted for a maximum of 15mins after loading. The cyclic peak to peak pressure...
  5. Theanalyst

    Young's modulus - change with temp variations?

    Hello, in relation to the change in the Young's modulus, would the posson's ratio also change with temperature??? Thanks.
  6. Theanalyst

    Yield strength change in welded heat affected zone!

    Actually, I meant how do the Young's modulus and poisson's ratio change. Sorry about that. Thanks.
  7. Theanalyst

    Yield strength change in welded heat affected zone!

    Hello, I have a part that has three metal sheets made of 1075 steel laser welded together on the outer edges to form an enclosed volume of air that is compressible to take care of some pressure waves in a tube and regulate the dynamics. The question I have is how does the yield strength and...
  8. Theanalyst

    Plastic Analysis vs. Satisfied Client

    Bill, that was a great post. I am a full time structural analyst and there are two rules that I follow: If the hardness of the part is in the HRC50 range, then I use the maximum principal stress to compare to the ultimate tensile stress of the material for brittle failure, and if the part does...
  9. Theanalyst

    Contact Sets between surfaces of two separeted parts

    Hi Jules, its always a good idea to form groups of surfaces that you think might come into contact before you create the FEM from assembly. Can you see all the elements of the assembly FEM? are you able to see the load set or restraint set pertaining to that particular part FEM when you make...
  10. Theanalyst

    How to create AVI files

    Hi ESOH, Goto the web site www.download.com Download a software called Snagit, this is basically a screen capture software, it can capture images as well as videos. Install it on your computer (most probably will be a trial version but will be free for a while) It does not care what you are...
  11. Theanalyst

    I-DEAS FEM

    Hi zulu, I have been using IDEAS linear static stress solver for the past 1.5 years now. Unfortunately thats the only capability I have right now. So far, I did find IDEAS meshing pretty competitive, like Irwin said. But they do not have a capability to combine constraint sets, hence a...
  12. Theanalyst

    Finding Diaphram (stretching) Stresses with IDEAS Linear Static Solver

    Hello guys, I have a question about analyzing the diaphragm stresses induced in a peice of sheet metal. Here is the model problem: If you can imagine the lid of a tupper ware box, and imagine that the outer circumference is like a surface, flat, with a small radial thickness to it, take another...
  13. Theanalyst

    Analyzing Diaphragm Stresses in IDEAS Linear Static Module!

    Hello guys, I have a question about analyzing the diaphragm stresses induced in a peice of sheet metal. Here is the model problem: If you can imagine the lid of a tupper ware box, and imagine that the outer circumference is like a surface, flat, with a small radial thickness to it, take another...
  14. Theanalyst

    comparison of first and second order tet elements

    Hello femac, Try this link, I think it has very useful info that generally applies to any FEA program: www.mscsoftware.com/support/library/conf/auc99/p04299.pdf Take care.
  15. Theanalyst

    3D solid in Abaqus

    Christina, if you have access to Solid Works, one of the very popular CAD programs out there, it can be quite simple to create, Solid Works is quite powerful, although I am not exactly sure how you'd go about creating it. But then, after you are done, you can simply save the part file in one of...
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