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Recent content by Compositepro

  1. Compositepro

    Planetary Gearbox mounting

    The low speed side of the gearbox must be capable of reacting the maximum torque. The high speed side does not need to be capable of reacting the maximum torque unless it is used as the mount for reacting this torque. Gearboxes are usually designed the be lighter and less expensive by reacting...
  2. Compositepro

    Dual Media filter vs Pressure sand filter

    A sand filter is only a surface filter for particles larger than the sand grains. It is a depth filter for anything smaller. So it is primarily a depth filter.
  3. Compositepro

    Permeable Thin Material

    To dry a volatile liquid from a crevice or other highly restricted space you must use a temperature above the boiling point, otherwise the only mechanism for solvent molecules to move is diffusion through a porous medium also containing air molecules (no pressure gradient). Above boiling point...
  4. Compositepro

    Pressure vessel under negative Pressure

    Composites can perform very well in compression. Airplane wings have a balance between tension and compression forces.
  5. Compositepro

    Permeable Thin Material

    This is a filtering issue. The sorbent itself is a filter. Using heat will boil the acetone which could displace sorbent as well, unless done slowly, with heating to only slightly above the boiling point. Something like sewing thread acts as a semipermeable material. With thread capillary action...
  6. Compositepro

    FORCE TRANSFER

    How is a force absorbed? (Forces are balanced. Energy is absorbed).
  7. Compositepro

    conflicting information on vinyl ester hybrid mortar stripping of threads

    Vinyl ester has high shrinkage upon cure and is not a great adhesive. I would guess that the mortar lost its bond to the anchor, but not the bolt. The threads are still holding. When you threaded on the nut it could not screw the anchor any further into a blind hole, but you could unscrew the...
  8. Compositepro

    Need help sourcing a custom-made Buna O-ring.

    Custom O-rings are commonly made from rolls of O-ring stock. The groove should be slightly narrower than the O-ring cross-section to keep the O-ring in the groove. The stock should be cut slightly longer than needed so that the splice is under compression. Then you do not even need to glue the...
  9. Compositepro

    U-bend before pump suction inlet.

    It makes the pumps self-priming to some extent, in that it keeps water from draining completely out of the pump casing. There is a tee on the pump discharge with a ball valve for adding priming water (or pulling vacùum).
  10. Compositepro

    How to reduce fiber damage

    I know nothing of your simulation but I do know that what prevents fiber damage is delamination of the plies due to exceeding the shear strength of the resin. You must also account for the shear stress between plies caused by cure shrinkage and the difference in CTE (coefficient of thermal...
  11. Compositepro

    Miscellaneous Heat Load For Industrial machines

    Typically all the work done by these type of machines is 100 percent converted to heat. However, the work done is rarely as much as the nameplate capacity of the machine. The actual work can be measured or calculated using some physics and some assumptions.
  12. Compositepro

    Looking for Auto-Leveling Solutions & Mechanisms for MSLA Printers

    You appear to be using the terms leveling and alignment interchangeably. They are not the same thing. Leveling means alignment to the direction of gravity. Alignment means making the plates parallel to each other.
  13. Compositepro

    Crevice corrosion in 316L threaded fitting

    Sea water is not sterile, so why would you rinse with it? If you are using UV to sterilize the rinse water, your testing is showing that not to be effective.
  14. Compositepro

    NPT thread strength - Stress Distribution / Tensile Area

    I am not referring to hydraulic fittings, but mechanical...
  15. Compositepro

    Designing a custom pipe run with potential measurement inaccuracies

    Sounds like my first project out of school in a chemical plant. Replace several thousand feet of corroded 3" vent piping that ran the whole plant with new Kynar lined pipe. Just used a tape measure and isometric graph paper. I had to crawl though many crowded pipe racks. You, or your...
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