AN INVESTIGATION OF LOW LAMBDA YIELD FAILURE DESIGN OF STIFFENED CYLINDRICAL PRESSURE VESSELS UNDER EXTERNAL HYDROSTATIC PRESSURE

The designer of stiffened cylindrical pressure vessels is often faced with the problem of comparing structures of widely varying geometries. To do this, he makes use of a number of dimensionless parameters whose function is to reduce the number of variables in the design problem. The object of this thesis was to investigate the effect of the dimensionless parameter, Lambda, on stiffened cylindrical pressure vessel design. In particular, the Lambda region where collapse of vessels due to yield-initiated buckling between the frames was identified and delimited. This region was used as the first iteration in a design procedure aimed at producing a vessel of maximum structural efficiency. Design curves which may be used to develop such a vessel are provided for shell thicknesses up to h/D sub m = .01. These curves are based on both maximum principle stress and Hencky-von Mises stress criteria and provision is made in a computer program for use of other methods. A modified Foppl Formula is used for frame evaluations. The formulas used range from conservative to liberal in their approximations of collapse pressures. However, use of even the most conservative formulas results in structural efficiencies which compare favorably with present-day practices.

  • Corporate Authors:

    Massachusetts Institute of Technology

    Department of Ocean Engineering, 77 Massachusetts Avenue
    Cambridge, MA  USA  02139
  • Authors:
    • Hickey, D G
  • Publication Date: 1972-6

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Filing Info

  • Accession Number: 00044148
  • Record Type: Publication
  • Source Agency: Massachusetts Institute of Technology
  • Report/Paper Numbers: MS Thesis
  • Files: TRIS
  • Created Date: May 11 1973 12:00AM