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  1. Rattletrap

    Calculation pressure loss rate

    Hi, I would like to calculate the pressure drop in a chamber when there is an orifice with a certain flow rate. The chamber volume about 950 ML. Ambient temperature may vary between ambient and say 30 degrees C. The pressure drop to the chamber is from 101 kPa to 20 kPa over a minute. The...
  2. Rattletrap

    DZR Brass Heat conductivity

    Hi Everyone, Is there anyone that knows where or how I can find the value of heat transfer in metric if possible for DZR Brass? Thanks in advance. Regards
  3. Rattletrap

    Best Alloy for salt water (Sea water)

    Hi Guys. I am interested in finding the most suitable material for a sea water application. Because we would like to conduct heat Aluminium is the first choice. As the parts will be die casted I set my sites on A360. However I cannot find any good information regarding how this material will...
  4. Rattletrap

    Combustion pressure for explosion proof enclosure

    Yes DrWeig, exactly. That is it. Although the enclosure will not work in the envirnoment it is tested in it is tested like this to ensure is is a safe enclosure. Irstuff, That is why I ask the question. I realize that in my mixture I will have about 11 Mj of energy. How to get this energy...
  5. Rattletrap

    Combustion pressure for explosion proof enclosure

    Hi pmover, Yes it is ex rating for an enclosure. The gas is ignited by a spark. The volume is undetermined because it will depend on the design, it will be less than a 1000 CC anyway but as there is an escape path the volume will not be constant. However I guess that initially the volume will...
  6. Rattletrap

    Combustion pressure for explosion proof enclosure

    Hi All, I need to find the resulting pressure of an explosion of a 50% Acetylene and 50% oxygen explosion in an enclosure. The idea is the resulting pressure as to be able to design an enclosure which will sustain such a blast. I found the http://en.wikipedia.org/wiki/Heat_of_combustion value...
  7. Rattletrap

    NX 8 ?

    @potrero, I have .net ver 4. Problem seems to be that it wants an authoring license. I am still waiting for our support guy to let me know what might be wrong. It works on NX7.5 not on NX8.
  8. Rattletrap

    NX 8 ?

    I had so many bugs in my first week using NX8 that I decided to stop using it until the maintenance release. It varies from Journal programs that no longer work to more major problems like the stress wizard fiving incorrect results. I am mainly upset because my journal files don't work...
  9. Rattletrap

    Fatique failure due to vibration

    The bolts are held in with loctite. And yes it failed close to the bolt clamping area where the light is mounted see the picture above. The attachement point and the grip on the bracket is all visible on the picture above. The mass of the Spot light is proberbly aroound 3 kg or so. The sheet...
  10. Rattletrap

    Fatique failure due to vibration

    It proberbly fits on the body on the front since it holds a spotlight. The picture I am adding is of the bracket after I made changes to it already. But I am not convinced that this will guarantee that it would not fail again. What material will be better than 316 Stainless steel? Thanks...
  11. Rattletrap

    Fatique failure due to vibration

    I am trying to solve a problem regarding a bracket that was built and used on a truck. The bracket lasted only 2 weeks. The bracket is made of 316 stainless steel. I ran a vibration analysis on it and found that its natural frequency is about 50 Hz in the 6 scenarios shown by the software. I...

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