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Recent content by gdechaine

  1. gdechaine

    Residual Stress from welding in FEA NASTRAN

    I have a contractor of mine performing a FEA on a structure which experiences loading in all axis at several different locations. The structure consists of vertical I-beam support frames and 2" plate welded on to the supports. My question is what effects will the welded joints have on the...
  2. gdechaine

    Sampling Rates for Tensiometer/Strain Gage

    I have to agree with 8060A. As you have said due to resonance and position issues it is very hard to make an accurate high speed measurements. I need an accurate measurement in the range of 1,000 samples/ second. The application requires high speed and high resolution which as you have said is...
  3. gdechaine

    Sampling Rates for Tensiometer/Strain Gage

    Well it would be nice if we could use the load cell instrumentation however there is absolutely no place to install that type of instrumentation. So we are really stuck searching for a Wheatstone bridge type strain gage for the measurement. What I am not sure about is, whether or not there's...
  4. gdechaine

    Sampling Rates for Tensiometer/Strain Gage

    We can calculate the overall tension that will be seen in the piston using the pressure measurement from the cylinder and volumetric geometry however we still need to get a precise direct measurement of tension/strain on the piston itself due to the overall applied force. The measurement will...
  5. gdechaine

    Sampling Rates for Tensiometer/Strain Gage

    I have to measure the tension in the armature of a very large hydraulic piston. The tension can be as high as 250,000 lb over 1/2 sec. Does anyone know if there is a strain/tension sensor that can accurately measure the profile over the 1/2 sec. I have heard it might be difficult to find a...
  6. gdechaine

    Gear Train Alignment

    Thanks for the info. Definitely helped.
  7. gdechaine

    Gear Train Alignment

    I think the feeler gage you mentioned in combination with some of the gap formulas will probably be the best option. I tried searching for some of those equations but couldn't find anything that would really help so I gave up on the search a while back. If it's not to much trouble I would...
  8. gdechaine

    Gear Train Alignment

    I wasn't sure if there was a tool or gage that could be used for setting these distances besides a tape measure etc.. I guess I should have phrased the question differently. Thanks.
  9. gdechaine

    Gear Train Alignment

    What is the proper way to align a gear train to keep backlash to a minimum and extend the life of the gears? There are two gears in the assembly, one set about a foot higher than the other. Both gears contain the same overall specs including pitch diameter, pressure angle, etc... Maximum...

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