0
Research Papers: Design and Analysis

Plastic Collapse Assessment Procedure for Vessel With Local Thin Area Simultaneously Subjected to Internal Pressure and External Bending Moment

[+] Author and Article Information
Shinji Konosu

 Ibaraki University, Nakanarusawa Hitachi, Ibaraki 312-8511, Japan

Norihiko Mukaimachi

 JGC Corporation, Yokohama 220-6001, Japan

J. Pressure Vessel Technol 130(1), 011207 (Jan 23, 2008) (10 pages) doi:10.1115/1.2827491 History: Received September 08, 2006; Revised January 16, 2007; Published January 23, 2008

Assessment of the local thin area should be undertaken for both tension and compression bending. In this paper, simplified reference stresses for a flaw in a cylinder are proposed. By using these results, a newly developed p-M (internal pressure ratio and external bending moment ratio) diagram which can evaluate the collapse condition for pressure equipment such as vessels, piping, and storage tanks with a local thin area simultaneously subjected to internal pressure p and external bending moment M due to earthquake, etc., is proposed. The p-M line is verified by comparison with the finite element analysis results and the numerous results of experiment for a cylinder with a volumetric flaw obtained through the reference literatures. It was clarified that the differences in collapse limit between the p-M line and DNV guideline under both internal pressure and compression moment became evident where the outer diameter/wall thickness of a cylinder is large and the yield ratio of the material is small.

FIGURES IN THIS ARTICLE
<>
Copyright © 2008 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 4

Analysis region, load, and boundary condition of the cracklike flaw

Grahic Jump Location
Figure 5

FEM mesh of the cracklike flaw in the longitudinal direction

Grahic Jump Location
Figure 6

FEM mesh of the cracklike flaw in the circumferential direction

Grahic Jump Location
Figure 7

Analysis region, load, and boundary condition of the volumetric flaw

Grahic Jump Location
Figure 8

FEM mesh of the volumetric flaw

Grahic Jump Location
Figure 9

Load-displacement curve and collapse load due to pure pressure

Grahic Jump Location
Figure 10

Load-displacement curve and collapse load due to pure moment

Grahic Jump Location
Figure 11

Load-displacement curve and collapse load due to moment under the design pressure of 1.128MPa

Grahic Jump Location
Figure 12

Safety margins in newly developed p-M diagram for cylinders with an external surface flaw when σf is assumed to be σysmin for carbon steels

Grahic Jump Location
Figure 13

Influence of Do∕t for cylinders on buckling modification factor, ηc

Grahic Jump Location
Figure 14

Comparison between p-M line and DNV guideline under both internal pressure and compression moment

Grahic Jump Location
Figure 3

Comparison between exact reference stresses and approximation reference stresses for external circumferential flaw in a cylinder

Grahic Jump Location
Figure 2

External circumferential surface flaw

Grahic Jump Location
Figure 1

Surface flaw subjected to axial stress and moment with rotation restraint

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In