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  1. HeinBau

    Vapour barrier for composite antenna

    We are manufacturing a thin skin (1mm) L-band antenna (1.5GHz)from E-glass epoxy. Ons of the problems we are facing is that there seems to be moisture migration through the skin, which to the antenna guys is a problem. This seems to occur at molecular level, as the void content of the laminate...
  2. HeinBau

    Water absorption properties of phenolic laminates.

    Dear reader, We are currently manufacturing quite large panels for a scientific base from the following materials: Skins : E-glass/phenolic (Cellobond 2027), 6mm thick Core : Polyurethane foam, 120mm thick The sandwhich panels are typically 7m long, 2.4m wide and 120mm thick. They are trimmed...
  3. HeinBau

    Material property PRXY vs NUXY?

    Hi Mohr, Thanks. There right before my eyes in the manual. If all else fails, read the manual! Regards HeinBau
  4. HeinBau

    Material property PRXY vs NUXY?

    Hi Mohr, Can you please be a little more specific on the title and author of the book, as I do not have it. I have quite a few other books in the field, but nowhere in them or the Ansys theory manual do I find anything on the matter. Regards HeinBau
  5. HeinBau

    Material property PRXY vs NUXY?

    In the older versions of Ansys one used the minor poisson's ratio NUXY etc when giving orthotropic material proerties. In version 6 the major poisson's ratio PRXY is required. What is the definition of PRXY, and what is the conversion to NUXY. Regards
  6. HeinBau

    EMI properties of carbon laminates?

    Can anybody shed some light on the EMI properties of typical carbon/epoxy laminates. Is additional screening such as flame/arc spraying, or nickel coated carbon veils or metallic meshes really required, or is the carbon laminate sufficient for EMI screening. Additionally, should a carbon...
  7. HeinBau

    Composite Fasteners

    Check out www.icotec.ch
  8. HeinBau

    Composite FEA

    ANSYS finite element package has solid composite elements over and above the normal laminated shell elements. Regards

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