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  1. krt222

    Bounds of physical model for dynamic analysis of structural component

    Hello, Here's the scenario: 1) A large complex dynamic structure of numerous components has been modeled in MSC Adams as a system of simplified spring-mass-dampers representing each of of the structural components 2) System level loads have been estimated via above Adams model 3) The above...
  2. krt222

    Transforming displacements into cylindrical csys in Femap

    Hello, I am using Femap v10 with NeiNastran and have a model with solid tet10 elements with displacement results. I am interested in transforming the displacements into a local cylindrical csys to obtain displacements in the T2 (theta) direction of that csys. Will the resulting displacements...
  3. krt222

    Kt for filled theaded hole...

    Understood. How about asking it this way - relatively speaking, what would be the difference in expected Kt for an open threaded hole in a thick plate seeing bending versus the same threaded hole filled with a preloaded clearance fit fastener (ignoring mean stress effects of fastener preload)...
  4. krt222

    Kt for filled theaded hole...

    Yea, I apologize for multi-posting. I was just trying to reach a larger audience. I concur that reaming and filling more soundly with an interference fit plug is more advantageous at reducing local stress magnitudes. Regardless, I want to understand what knowledge exists on Kt's for standard...
  5. krt222

    Kt for filled theaded hole...

    thread2-106068 Referencing the above thread, I wanted to extent the discussion to not a net fit fastener, but to a standard or clearance fit preloaded fastener in a threaded hole. What sentiment or knowlegde is out there for Kt's or Kf's for such a configuration. Thanks.
  6. krt222

    Regarding threaded hole Kf w/ and w/out preloaded fastener...

    Hi, I've done some searching across various forums on this site to little avail so I've decided to post this Q on a few forums: Can a vacant threaded hole in a structural member which is seeing alternating bending loads and thereby stresses (due to ovalization of the hole) see significant...
  7. krt222

    Determining level of geometric detail to be included in FEM

    Greg, My question was not geared towards accuracy of the loads or the fatigue calculation methodology but rather what level of geometric detail need be included in my finite element model. I'm given the loads for my analyses and I do accomplish various sanity checks on them to ensure...
  8. krt222

    Determining level of geometric detail to be included in FEM

    flash, Thanks for the input. I'll have to read up on submodeling as I've admitedly not done any to date. With as many relatively small fastener holes and small machining features as exist on the components I'm analyzing, the complexity of the macrogeometry and the fact that loading is very...
  9. krt222

    Determining level of geometric detail to be included in FEM

    Sorry I should make a clarification: "...and plot a gradient at that cut-off value and only include micro geometry which are located in areas greater than the cut-off." Also, I should have noted that it is my intention that the components in question be meshed with solid tetrahedral 10 noded...
  10. krt222

    Determining level of geometric detail to be included in FEM

    Hello, First, let me state that I attempted to search for answers to this question throughout this website but did not find exactly what I was looking for. If I have missed this exact question and answers to it somewhere, please make me aware and direct me via a link. So, my question is this...

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