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  1. Worldtraveller

    Inserting image in MathCAD prime 3.1 cause...issues.

    I am using MCAD Prime 3.1 at work. I have a couple of issues with it so far. (I have lots of experience with MathCAD prior to PTC, and still run that for my own business.) 1) When I copy/paste an image from word or drag and drop it into the MCAD file, it won't let me save the file after that...
  2. Worldtraveller

    Looking for a reference

    I have, in the past, read at least a couple of engineering related books (as opposed to scholarly theory) about applying FEA to various structures. In general, if possible when modelling aircraft structure, it is better to use 'lower dimensional' elements. This is the generally accepted means...
  3. Worldtraveller

    Honeycomb Sandwich inspection

    I'm helping write/review the process specs for some of our repairs, particularly with regard to composite (solid laminate and honeycomb). We have a very old spec that just says, "Inspect for moisture and corrosion." <--- That's not vague at all. It doesn't call out a process or process spec...
  4. Worldtraveller

    Discrepancy in formula for ring doubler in shear web?

    A colleague is working on a presentation that our company is putting together for basic stress analysis topics for our customer. We are going through the presentation that was originally created by a previous engineer (who is no longer with the company) and discovered some discrepancies...
  5. Worldtraveller

    MathCAD Prime Express 4.0

    I have still been using MathCAD 12 (I think, very old version that works just fine). So far my initial impression is unfavorable, but I don't know how much of that is due to Express' limitations. Also, this is my first time trying Prime, so some of these issues may have been around since they...
  6. Worldtraveller

    Displaying a single element/node ID

    I know how to turn the element or node IDs on for the entire model, but is there a way to select a single element or node and just turn that ID on? I've searched through several tips and tricks tutorials and not been able to find this solution. Thanks.
  7. Worldtraveller

    Bugwith contour levels? (version 11.0.1)

    I have a model that's a simple 2D plate. I am trying to adjust the contour levels with more than the default 16. When I change it display more levels, (say, from 16 to 24) the scale from the max to zero stays the same (8 levels) and it increases the number of levels between zero and the min...
  8. Worldtraveller

    Looking for documentation.

    I have been operating under the assumption that MaxPrnStress and MinPrnStress in the post processor are using the fairly standard Mohr's circle calculations, but I am having trouble finding Siemens documentation that shows what they are. I am doing analysis for a lawsuit, so I really need to...
  9. Worldtraveller

    Enforced rotation

    I'm trying to model a frame (see image) with an applied torque, and a set rotational displacement. The plate is fixed the upper right/lower left corners (UR LL) and the load is applied through a RBE2 at the center of the plate. It works fine with torque only, but the solver crashes when I...
  10. Worldtraveller

    Easy question (I think) about editing point positions.

    ...because the answer is either going to be easy, or it can't be done without directly editing the deck. I have a plate that is 'twisted' such that the opposing corners are offset from the neutral plane by the same amount, but level. If I box select a group of points at one corner, can I...
  11. Worldtraveller

    Modelling a flex plate.

    I have to figure out a way to model a helicopter drive shaft flex plate, similar to that seen here: http://www.copters.com/R44_SkinsOff/UpperSheave/20090608__ND38066.jpg I will need the stresses in the plate under load, and with a given misalignment. I am wondering what the best way to apply...
  12. Worldtraveller

    Solidworks/FeMAP interface.

    This may be better to ask a solidworks person, but the end result I'm looking for is in FEMAP, so.... I have a model, built in SW, so it's a full 3D solid model. I want to convert part of it into a 2D surface model. I thought that I could delete the solid geometry, and it would leave the...
  13. Worldtraveller

    Good D&amp;DT reference?

    Can anyone here recommend a good D&DT reference book? I've got the handouts and 'textbook', which was really just a collection of printed material from various sources, from the class I took a few years ago, and I have Petersons stress concentration factors, but is there a D&DT book, similar to...
  14. Worldtraveller

    Vibration mode(s)?

    Disclaimer: I'm a stress guy, so this vibration/dynamics stuff is mostly new to me, at least in a professional sense. I have accelerometer data (3-axis) from 2 locations, approximately 4 feet apart on a structural member. Is there a way to determine the vibration mode(s) from this sort of data...
  15. Worldtraveller

    Automating processes with DIAdem scripts (VBI).

    There doesn't seem to be a separate forum for DIAdem, so I thought I would ask this here. I have found a couple of online videos showing that the VB recorder can be used to automate processes, but it doesn't work for what I'm trying to do. I've got some background in programming, but it was a...
  16. Worldtraveller

    Joint Bypass loads/stress calculation

    I recall working with an engineer way back in the day to develop a one dimensional 'FEM' to calculate joint stresses based on the number of rows, layers of material, fastener material, and geometry. It didn't have the fidelity of a full on 3D FEM, but it was fast, pretty easy, and reasonably...
  17. Worldtraveller

    Probably an easy post processing question.

    I have 4 nearly identical structures in a single model. When I display output (e.g. min/max plate stresses), is there a way to make the contour and contour levels auto scale with just the part that's displayed? I currently have the 4 structures in separate layers, but that doesn't seem to...
  18. Worldtraveller

    Can this be done with FEMAP API?

    It's been a long time since I've really used FEA software (hence all the questions...), and my only real experience has been with Ansys (10 years ago) and FeMAP/Nastran (currently, but at least 5 years ago prior to this). I seem to remember Ansys being able to select nodes, elements etc...
  19. Worldtraveller

    API Tutorial?

    I've found a couple of good API references, but nothing that really gives a basic intro to using the API. Anyone aware of anything like this? I've got enough repetitive processes that at this stage, I think learning the API and programming these steps would be about the same amount of time as...
  20. Worldtraveller

    Alternative FEA software?

    This is not a complaint thread about any existing FEA packages. I am rather happy using the commercial packages that are exist. What I am looking for though, is a package or packages that 1) run in a Linux environment, and 2) something that comes close the a fully integrated pre and post...

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