Limit pressures are evaluated for cylindrical perforated shells containing circular holes arranged in the various penetration patterns typically found in practice. Statically admissible discontinuous fields of stress are used to obtain rigorous lower-bound limit pressures. These solutions are shown to be quite close to the actual limit pressures based on the efficiency of the discontinuous fields of stress and a comparison with upper-bound solutions. The optimal spacing parameters are obtained over the interesting range of ligament efficiencies for both the diamond (romboidal) and rectangular penetration patterns. The results of this work show that for most penetration configurations, the present ASME standards require substantially thicker shells than would be needed to maintain the same safety factors that are used for unperforated shells. On the other hand, the British and German standards allow the use of thinner shells than would be needed to maintain the safety factors for unperforated shells. Revised design curves which provide the same margin of safety for all configurations are derived and are proposed for use in design standards.
1991 is the Silver Anniversary of the ASME Pressure Vessels and Piping Division. The PVP Division was formed 25 years ago to serve as a focal point for mechanical engineering as related to the pressure vessels and piping industry. Through the PVP Division’s extensive publications, conferences, short courses, and tutorial lectures, pressure vessel and piping technology and new development information has been disseminated throughout the world. This chronological essay of significant events and contributing people has been written for posterity to record the first 25 years of the Division. May the next 25 years bring equal or greater success to the ASME Pressure Vessels and Piping Division!
Historical information concerning the Pressure Vessels and Piping Division was presented by James Farr at the 25th Anniversary Celebration, describing events from 1966 through 1991. Further developments since 1991 are briefly summarized in this presentation for the Millennium Issue. The PVP Senate has been the historian of the Division’s growth and activities. [S0094-9930(00)02803-1]
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