Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. ozzkoz

    looking for help w/ heat equation + surface convection

    Thanks, I'm thinking I'd try approximating the time derivative at t=0 assuming a very small thermal bounday depth, 1 micrometer or so. Then compare solution against constant fluid temp exact solution to be sure it's reasonable.
  2. ozzkoz

    looking for help w/ heat equation + surface convection

    Hi, I have an application in which I have a semi-infinite solid subjected to surface convection at the x=0 boundary and a time varying fluid temperature. I am familiar with the heat equation (d2Tdx2 = 1/alpha dTdt) and I've been able to solve my problem by discretizing the spatial domain and...
  3. ozzkoz

    split faces and swept mesh

    Hi, I'm hoping someone can help me with what (I think) is a basic meshing question. I have a part that I've split in spaceclaim to take advantage of symmetry/ create a sweepable multibody part using the share topology feature. I'm trying to control the swept mesh and seem to be having some...
  4. ozzkoz

    importing circuit boards

    I am looking for some help getting circuit boards integrated with my pro-E model. A previous engineer has setup an assembly model which utilizes step files of circuit boards generated by a EE using Altium. Within the pro-E assemly we have a wire harndess created using pro/cabling. When we...
  5. ozzkoz

    ultimate strain of SS?

    The elongation is the total stretch at fracture, I'm actaully looking for the ultimate strain (strain at ultiamte strength, or the strain at onset of necking). I'm doing an elastic / perfectly plastic analysis and I don't think I can assume I carry the full plastic load all the way out to...
  6. ozzkoz

    ultimate strain of SS?

    I've been looking for the ultimate strain for some different materials and having trouble. Particularly 13-8 H1000, MIL-HDBK-5 has a stress strain curve but it only ges up to about 1.2% strain. They also have a "full range" but it shows the same Ramburg-Osgood curve and then at 1.2% strain the...
  7. ozzkoz

    split surface singularities

    This is a simplified example, my model is much more complex. It's actually a keyed assembly and I'm modeling the stresses in the keys. I guess I can model the assembly and use contact elements, this would be the closest thing to reality but I'm trying to keep the size of my model down. I was...
  8. ozzkoz

    split surface singularities

    I'm having a problem with singularities at the boundary of split surfaces when a portion of the surface has a fixed BC applied to it. As a simple example, if I have cantilevered arm which is supported by a wall over half the arm, I've split the surface in two, and applied a zero displacement in...
  9. ozzkoz

    pro mechanica convergence options

    Does anyone know if there is a way to run a MPA analysis in Pro/Mechanica and have it converge on both local disp/energy index and user defined measures? As far as I can tell I need to pick either the index or my own measures. Ideally I'd like to converge on the local displacement/energy index...
  10. ozzkoz

    linearized stress query

    I'd like to use the linearized stress query function while displaying a fringe plot but in the info tab it is grayed out as an option. Is there something I need to do in order to use it or do I need a more advanced license? The help menu says I'd be able to select two points to define the...
  11. ozzkoz

    weighted lnks in Pro/Mech

    I have a fairly basic question regarding weighted links in pro/mechanica. The way I understand the link is this. I attach a surface (say a cylinder) which is the independant side to a point, which is the dependant side. The point motion is then the average motion of the surface, so if the...
  12. ozzkoz

    mixing MMC and LMB

    why wouldn't 7.5 be a constant boundary? It would be the min boundary which would accept the part and respect datum precedence. I would think the gage would need to allow for any acceptable part which meets the high order datum. In this case I could have a pin of 7.1 and my gage would have to...
  13. ozzkoz

    mixing MMC and LMB

    ...at LMC would allow. I'd think that would be 7.5 (LMC zone would be 6.7 and a 7.1 dia could be line to line with that to give a 3.75 radius * 2 = 7.5). Can anyone chime in and confirm which line of thinking is correct? The standard appears to assume the datum modifier matches datum feature...
  14. ozzkoz

    looking for very basic weld info

    We don't really do any welding other than welding disks onto pieces to create seals. Nothing structural and no one at my company can really help. We typically just write "weld around this edge". I'm trying to understand joints a little more.
  15. ozzkoz

    looking for very basic weld info

    I have a few questions regarding welding and how it is specified on drawings. I've checked a few texts but haven't quit gotten exactly what I'm looking for. First off, fillet and butt welds. Do they always have some filler material which is added or are the pieces just melted together? How...
  16. ozzkoz

    bearing bore positional allignment

    Thanks for the table, that is the kind of thing I was looking for, I just have to figure out what the fits are (must be metric equivalents to LCx). It doesn't sound like I I'll be able to meet these fits, is it maybe ok to have a little bit of radial interference loading the balls?
  17. ozzkoz

    bearing bore positional allignment

    I'm fairly new to using ball bearings and I was hoping for some advice on what I think should be a very common topic but I can't actually find any info on. When I have a simple shaft system with a bearing on each end and mounted in a 2-part housing. There is going to be position of the...
  18. ozzkoz

    camed surface on a cylinder?

    I am tying to create a camed surface cut into the ID of a cylinder. Does anyone have a good method for this? Essentially I want a groove around which has a ramp up to another level.
  19. ozzkoz

    volume regions and elastoplatic analysis

    My volume does extend beyond the solid model, but I've had this work before. I think the problem is related to simplified reps. I de-featured my model by making an FEA Representation and excluded things that wouldn't effect the result but would add complexity. I changed it to use family...
  20. ozzkoz

    volume regions and elastoplatic analysis

    I'm using the mesh refinement to set the maximum element size in the volume. In my case .040.

Part and Inventory Search

Back
Top