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Study on Plastic Collapse Load of Steel Elliptical Heads Under Internal Pressure

[+] Author Affiliations
Liang Sun, Guide Deng, Jiufeng Zhao

China Special Equipment Inspection & Research Institute, Beijing, China

Paper No. PVP2013-97891, pp. V01BT01A024; 5 pages
  • ASME 2013 Pressure Vessels and Piping Conference
  • Volume 1B: Codes and Standards
  • Paris, France, July 14–18, 2013
  • Conference Sponsors: Pressure Vessels and Piping Division, Nondestructive Evaluation Engineering Division
  • ISBN: 978-0-7918-5564-5
  • Copyright © 2013 by ASME


A general formula for plastic collapse load of elliptical heads under internal pressure is useful in plastic collapse design and integrity assessment of pressure vessels. Plastic collapse load of steel elliptical heads with different shapes and thickness was computed by finite element analysis using elastic-perfectly plastic constitutive model, and a formula with maximum relative error less than 6% was derived from the numerical results. The formula is a function of the yield strength of materials, the ratio of major axis Di to minor axis 2hi and that of outer diameter Do to inner diameter Di, and is applicable to steel elliptical heads with Di/2hi within 1–2.6 and Do/Di within 1.001–1.300.

Copyright © 2013 by ASME
Topics: Pressure , Steel , Stress , Collapse



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