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Pressure vessel in a (near) vacuum

  1. Mar 12, 2012 #1
    I dont know if its daylight savings or what, but I just cant seem to wrap my head around this analysis.

    There is a polycarbonate hemispherical head with 8 psi in a near vacuum environment (2.8 torr)

    Im trying to figure out what the minimum thickness is for the head.

    The shell is super thick and seamless so Im not worried about it.

    The OD is 3.5"
     
  2. jcsd
  3. Mar 12, 2012 #2
    Just add 1 bar to the pressure inside the head to account for the extra force due to the vacuum outside.
     
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