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Recent content by laminarflow

  1. laminarflow

    Flat disk with pressure. Results are too low.

    The problem I have buying a package is that I only need to check something only a few times a year. Hard to even learn and stay current like that I know. Oh well, I have friends with complete packages so we'll just trade work.
  2. laminarflow

    Water tightness errors really bug me. Any easy way to solve these?

    Hi, It has tubes connected together so it is more than just a truss. There are some tubes in bending with some plates, etc. I can get it to mesh correctly 1 out of 3 tries and the results at least make sense. If I get into more of this I guess I'll get a full version but for now I'll try...
  3. laminarflow

    Flat disk with pressure. Results are too low.

    Not having access to the full version of Algor, I apparently didn't realize how limited it is. Too bad they don't offer an intermediate version. Any suggestions? Thanks for running this and making me realize the limitations of Design Check. I apparently have a lot to learn.
  4. laminarflow

    Flat disk with pressure. Results are too low.

    Before we continue, I have to admit I have little experience using FEA. Only what I have done with Algor and Cadre. So I don't quite know what you mean by "Quarter symmetry model using plate elements". The Roark's and your model confirm the max displacement. I was just modeling a disk in...
  5. laminarflow

    Flat disk with pressure. Results are too low.

    I have a diaphragm disk, .0625" thick, 4.944" diameter, 17-4 PH H-900. I fixed the very edge around the diameter, the .0625" thick OD edge, and put 50 psi on one face. I end up with .004" max deflection in the very center. That seemed low so I had a friend run the same test on Pro-E and he...
  6. laminarflow

    Water tightness errors really bug me. Any easy way to solve these?

    I have a tubular frame and half the time I get water tightness errors. What gives and is there any way to find and fix these in the Model? I am using Alibre and Algor Design Check.
  7. laminarflow

    ANSYS ED suitability for a Truss Project

    I have a welded steel tube truss structure that I would like to analyze. It is similar to a bicycle with some slightly curved parts and four sided bays. I have looked at several packages available in the under $500.00 range and ANSYS looks the best. Is the ED version suitable for a project...
  8. laminarflow

    Why Crawlspaces instead of Slab on grade?

    When the site is very steep, an insulated basement or bermed in insulated wall can be used. But if there is a benifit to getting the house up high, a view or up to capture some sun if the house is on the north slope, then I think I would use an insulated basement and utilize the space. I've...
  9. laminarflow

    Why Crawlspaces instead of Slab on grade?

    "Your lack of respect for builders and the way things are usually done may come back to haunt you." You bet. Sometimes I feel that I'm being haunted, like right now! "You dismiss far too easily the way things are usually done on the premise that builders have no reasons other than supreme...
  10. laminarflow

    Why Crawlspaces instead of Slab on grade?

    Mitchelon, I don't think there is any frost depth here. It is maritime and although we did get 6" of snow in December and due for an inch tonight, the winter temps are usually in the 30's. Not many basements but what you do see is crawlspaces on a slope that are tall enough to be a basement...
  11. laminarflow

    Why Crawlspaces instead of Slab on grade?

    I'm amazed that someone would build a slab with forced air ducts under the slab. Why? Forced heat air works just as well with ducts in the walls and ceiling. If you call forced air good. I hate it. It would be much better of course to put radiant in the gravel below the slab or in it...
  12. laminarflow

    Why Crawlspaces instead of Slab on grade?

    Hi DRC1, That does make sense but in the Pacific Northwest, it's mostly crawlspace on the west of the Cascades where freezing temps are not an issue. Water is to a degree but not that bad depending on where the location is. On the east side where it gets colder and has less rain, there are...
  13. laminarflow

    Why Crawlspaces instead of Slab on grade?

    Well excuse me! Well in that case, yes, antifreeze would be helpful. But I would bet that with energy prices headed in the present vector and magnitude, that is not a common practice. I guess for solar heating I would approve. Whoever you know with heated driveways, see if you can get me...
  14. laminarflow

    Why Crawlspaces instead of Slab on grade?

    I'm not sure why a system, even in very cold climates, would need anti-freeze. It's a heating system. Even if the house was vacant for weeks, I can't imagine the temp dropping below freezing on an insulated slab. The residual heat would last quite a while. And assuming a crawlspace house had...
  15. laminarflow

    Why Crawlspaces instead of Slab on grade?

    We overlapped CO. There is no need for antifreeze and it might not even be code in a hydronic system. It should never see freezing temperatures. Solar collectors sometimes use antifreeze because of freezing, but a drainback solar system is also used. What exactly is a "nice" house? I have...
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