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  1. tlewis3348

    How do I create a named selection referencing another named selection using the ACTConsole in ANSYS?

    Ha! I figured it out! The command worksheet.SetValue(0,NmdSlct.ObjectId) should be used, where NmdSlct is the named selection object that you want to reference.
  2. tlewis3348

    How do I create a named selection referencing another named selection using the ACTConsole in ANSYS?

    I used the information here (link) to create a named selection using the ACTConsole. However, I need the named selection I'm creating to reference another named selection. Therefore, I have tried to use the code below: worksheet.AddRow()...
  3. tlewis3348

    Can I use an ACTConsole Snippet to get solid bodies in a geometry group?

    Perfect. Thanks!
  4. tlewis3348

    Can I use an ACTConsole Snippet to get solid bodies in a geometry group?

    I normally group all the solid bodies representing bolts in a model together into a single geometry group. I would like to use a ACTConsole Snippet to get a list of all the bolts in that group. Is that possible? I am currently using this to get the groups in the model...
  5. tlewis3348

    Average Stress in Bolt Cross Section

    Thanks. I must have missed that! Having said that, I am somewhat confused about what the bolt tool is measuring. For example, I have several of the same sized bolts with the following load specified: These showed the following "Working Load" results under the bolt tool: For time step 2...
  6. tlewis3348

    Average Stress in Bolt Cross Section

    I am modeling bolts with pretension loads, and I want to make sure that loads from other sources don't cause the total load isn't going to cause failure. My initial attempts were to just see if the peak stress in the bolt was higher the the failure criteria for the material. However, I quickly...
  7. tlewis3348

    What is the minor diameter of a thread in terms of its nominal diameter and pitch?

    Agent666, Thanks for the information! The thread shown below has a good bit of very valuable information as well. http://www.practicalmachinist.com/vb/general/what-minor-diameter-thread-terms-its-nominal-diameter-pitch-350016/
  8. tlewis3348

    What is the minor diameter of a thread in terms of its nominal diameter and pitch?

    I'm trying to find the formula for calculating the tensile stress area of a bolt. According to page 1528 of The Machinery's Handbook (29th Ed.), that formula is given as A_S=(π/4)*((d_m+d_p)/2)^2 where the pitch diameter is d_p=d−0.649519×P, and the minor diameter is d_m=d−1.299038×P. I was...
  9. tlewis3348

    Porosity settings for an AC coil

    I'm attempting to account for flow through the AC coil for a commercial chiller in a simulation where the unit is sitting in a wind tunnel (the goal being to make sure the system survives a hurricane). I want to accomplish this by approximating the coils as porous volumes. Assuming that I know...
  10. tlewis3348

    Specifying Regions in Coupled Fluid-Structural System

    I'm trying to set up a fairly simple coupled fluid-structural system to learn how it works. My system simply has a flat plate with wind blowing on its face. The plate has a fixed displacement constraint on a small area in its center. Currently, as far as I can tell, everything is set up properly...
  11. tlewis3348

    Specifying Regions in Coupled Fluid-Structural System

    I'm trying to set up a fairly simple coupled fluid-structural system to learn how it works. My system simply has a flat plate with wind blowing on its face. The plate has a fixed displacement constraint on a small area in its center. Currently, as far as I can tell, everything is set up properly...
  12. tlewis3348

    How to model the effect of wind on a sheet metal panel?

    Yeah, after sleeping on it last night, that's basically the conclusion I came to. Having said that, it might be easier said that done to do that. I just got finished talking to a coworker who is more familiar with what happened about what's going on and he said that there was apparently a...
  13. tlewis3348

    How to model the effect of wind on a sheet metal panel?

    So most of what I've done in the past is analysis on static systems. However, there is currently an urgent need for some non-static analysis to be done where I work, and I'm the only one available right now that knows how to use ANSYS. What happened was that we had one of our systems that was...
  14. tlewis3348

    Modeling Bolts in Shear

    So I finally got it to work. There was a tiny gap between the sleeve and the hinge pin that was not completely closed when I initially moved the parts, and between that and reducing the initial substeps down to 1000, the simulation finally ran correctly. Thanks so much to both of you for all...
  15. tlewis3348

    Modeling Bolts in Shear

    Okay, so I should have realized that the sleeve should have been in contact with the pin a while ago. That seems pretty obvious now. So having made that change and finding some parts that were not bonded as they should be, I think I'm much closer to getting this figured out. However, I'm still...
  16. tlewis3348

    Modeling Bolts in Shear

    Hmm... Here's where I really wish I could share my model with you so you could see what it looks like. This is a cover for the end of an HVAC chiller, and what I'm modeling is the hinge that allows the cover to be opened so the chiller's tubes can be cleaned. The large square plate in the model...
  17. tlewis3348

    Modeling Bolts in Shear

    These are the errors/warnings I'm getting. Error An internal solution magnitude limit was exceeded. (Node Number 178117, Body CT51EA480_G21(Open 0 deg w/ Bolts), DOF UY) Please check your Environment for inappropriate load values or insufficient supports. You may select the offending object...
  18. tlewis3348

    Modeling Bolts in Shear

    So between the blog shared by @L_K and the tutorial on contact in ANSYS here: http://inside.mines.edu/~apetrell/ENME442/Labs/1301_ENME442_lab6_lecture.pdf, I changed the contact detection method to "Nodal-Normal To Target" and the normal stiffness factor to 0.2, and also changed the pinball...
  19. tlewis3348

    Modeling Bolts in Shear

    So I just did the simulation with the mesh aligned, but it is still producing the bad results: This is at 1X scale. Note that these results are not converged because the simulation crashes before it will finish. Ultimately, the only way I've found to get the simulation to run without crashing...
  20. tlewis3348

    Modeling Bolts in Shear

    As far as how much magnification was in the image I showed above, I ran that simulation quickly just to get a screenshot of the behavior I've seen above. Therefore, I didn't let the simulation run for very long, and just magnified the results to be similar to what I'd seen before. Whatever the...

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