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  • Users: jargon5
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  1. jargon5

    THERMOD Program

    Has anyone used the THERMOD program from NIAR's Website? Reviews and/or comments? We are thinking of using it as a trial run...and would like some unofficial comments. Since it is essentially "use at your own peril", we are seeking some advice...
  2. jargon5

    Vibration and Q-Factor

    I need to calculate the q-factor for an airplane part. Does anyone have any good references to calculate the q-factor for a composite structure?
  3. jargon5

    Fatigue Data

    My company is trying to build a good composite library, and I was wondering if anyone has some good references for graphite/epoxy fatigue data?
  4. jargon5

    Contact Elements: Accuracy?

    I have an assembly that I set "Global Contact", and have produced results that are marginally what I expected. Does anyone have any experience with the accuracy of Cosmos contact elements? I am used to NE/Nastran, and know the difficulty of assessing the actual phenomena when using this approach.
  5. jargon5

    Hydraulic Dampener Analysis

    My company has a hydraulic dampener for landing gear that uses a bleed hole in the cam. I need to evaluate how much actual pressure is formed within the chamber where the fluid is bleeding out of at impact loading. Does anyone have a good reference for this kind of analysis?
  6. jargon5

    Insufficient Virtual Memory Problem

    Hello All- I have a huge file that has an excess of 220,000 nodes (200,000 elements), and each time I run the analysis, I get the Fatal Error S1110, which states the following solution options: Increase your virtual memory setting (see virtual memory in Windows Help). If this does not...
  7. jargon5

    Bearing Allowable for Graphite/Epoxy Laminate

    Anybody have general information on bearing allowables for graphite/ epoxy laminate with 60% uni-directional fibers and 40% +-45 fibers? I generally use half of the compressive strength, approximately 60 ksi, but I would like some good documentation.
  8. jargon5

    contour variation during animation

    Does anyone know how to allow the stresses to change with the part in animation mode in FEMAP post-processing? This would help demonstrate where the peak values are (compression, tension, etc.).
  9. jargon5

    Sandwich Core Analysis

    Any help on determining the tensile and shear allowables for a sandwich core? I am using a sandwich core that consists of carbon plies for the skin and Rohacell W70 as the core. The part is in direct shear and torsion. I have the part analyzed on FEA Nastran, and am trying to determine the...
  10. jargon5

    Welding Properties for Stainless Steel 17-4 PH

    does anyone know where I can find the direct shear, bending, and tensile properties for 17-4 PH that has been welded with electrode of e70?
  11. jargon5

    units on density in FEMAP

    Does anyone know how to reconcile the units on density when using FEMAP and using lbf, inches, secs as the base units (this allows for psi to be inputed for stresses)? The Nastran Techs say to divide by the density, which is in units of lbf/in^3 by 386.4 (converting ft and gravity), yet when I...
  12. jargon5

    Hybor Material-

    My company has recently wanted to employ HyBor laminate (Boron/Epoxy) in an aircraft application. I have heard that there is significant handling concerns regarding the material. Has anyone used this particular material, and are there any issues that I should be aware of as I implement the...
  13. jargon5

    integrating two meshed models in FEMAP

    When integrating a meshed model with another meshed model in FEMAP, does anyone know how to effectively renumber one of the models so that the element numbers don't overlap? I am particularly referring to laminate elements, but I think the general rule of how to do it should apply to any kind...
  14. jargon5

    negative eigenvalue for linear buckling

    Does a negative eigenvalue in linear buckling with a magnitude greater than one signify that the direction of the load produces such a safety factor? Or does it mean that the matrix solver could not converge? Help please.

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