Elastic-plastic design by analysis for gross plastic collapse

Rory Carmichael, Donald Mackenzie

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Abstract

An investigation of the ASME VIII Div 2 elastic-plastic stress analysis method for protection against plastic collapse is presented. Four example configurations are considered and calculated design pressures are compared with values determined by alternative procedures based on limit analysis and bilinear hardening/the twice elastic slope criterion. It is found that the ASME VIII Div 2 procedure does not generally lead to evaluation of higher design pressures than the alternative approaches. In an example configuration demonstrating significant geometric strengthening, the allowable load is limited by the local strain criterion and in practice user-defined service criteria would be applied to limit permanent deformation under design conditions. In two example configurations that failed through membrane action, the evaluated design pressure was found to be less than that based on limit analysis. These initial results indicate that the more complex elastic-plastic stress analysis used in the ASME VIII Div 2 method does not necessarily lead to evaluation of higher design loads than alternative design routes. Further studies are required to determine the general circumstances in which the more complex analysis method is advantageous in design.
Original languageEnglish
Title of host publicationProceedings of the ASME pressure vessels and piping conference 2010
Subtitle of host publicationComputer technology and bolted joints
Place of PublicationWashington, USA
Pages81-87
Number of pages7
Volume2
DOIs
Publication statusPublished - 18 Jul 2010
EventProceedings of the ASME Pressure Vessels and Piping Conference 2010 - Bellevue, Washington, United States
Duration: 18 Jul 201022 Jul 2010

Publication series

NamePressure Vessels and Piping Division of ASME
PublisherAmerican Society of Mechanical Engineers
Volume2

Conference

ConferenceProceedings of the ASME Pressure Vessels and Piping Conference 2010
CountryUnited States
CityBellevue, Washington
Period18/07/1022/07/10

Keywords

  • plastic collapse
  • local strain criterion
  • geometric strengthening
  • elastic-plastic stress analysis

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