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Pressure in Tube, Bulk Modulus

  1. Feb 21, 2012 #1
    A straight tube, 1m long, of radius 10mm and wall thickness, is closed at both ends. It is found that when the pressure inside is increased from 10^5 Pa to 10^6 Pa the tube lengthens by 100um. What is the bulk modulus of the material of the tube?

    Well know that P = -Bdv/V and also that for a thin tube of radius r and thickness t<<r under pressure P the hoop stress is rP/t and the stress in the axial direction is rp/2t

    I can work out the fractional change in volume etc but really stuck with the question! Please HELP!
     
  2. jcsd
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