0
Research Papers: Codes and Standards

Verification of the Combination Rules of Multiple Flaws in ASME B&PV Code Section XI: A Case Study of Two Adjacent Surface Planar Flaws

[+] Author and Article Information
Toshihisa Nishioka

 Kobe University, 5-1-1 Fukae-minami-machi, Higashi-nada-ku, Kobe 685-0022, Japannishioka@maritime.kobe-u.ac.jp

Guangqin Zhou

Graduate School of Science and Technology, Kobe University, Fukae-minami-machi, Higashi-nada-ku, Kobe 685-0022, Japanzhouguangqin2000@hotmail.com

Takehiro Fujimoto

 Kobe University, Fukae-minami-machi, Higashi-nada-ku, Kobe 685-0022, Japantakehiro@maritime.kobe-u.ac.jp

J. Pressure Vessel Technol. 133(2), 021101 (Jan 31, 2011) (5 pages) doi:10.1115/1.4001917 History: Received January 12, 2009; Revised May 13, 2010; Published January 31, 2011; Online January 31, 2011

In nuclear pressure vessels, multiple surface cracks are often found by regular inspection. In order to evaluate the integrity of the vessels, ASME B&PV Code Section XI provides the flaw combination rules; however, its accuracy has not been clarified yet. For the analyses of interacting multiple semi-elliptical surface cracks, in 1983 Nishioka and Atluri developed the Vijayakumar, Nishioka, and Atluri (VNA) solution-finite element alternating method which is highly accurate and cost effective. Using this highly accurate VNA-finite element alternating method, the case of extremely closely located two interacting coplanar cracks was analyzed. From the numerical results, it is found that the B&PV Code Section XI provides a conservative flaw combination rule. Therefore, the B&PV Code Section XI is precisely verified by modern and accurate computational technologies.

FIGURES IN THIS ARTICLE
<>
Copyright © 2011 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Combination rule for two surface flaws and definition for locations and shapes of two flaws and a combined flaw.

Grahic Jump Location
Figure 2

Two surface flaws in a plate under membrane stress

Grahic Jump Location
Figure 3

Stress intensity factors for two semicircular cracks and a combined crack under membrane stress, at d1/t=0.2

Grahic Jump Location
Figure 4

Stress intensity factors for two semicircular cracks and a combined crack under membrane stress, at d1/t=0.4

Grahic Jump Location
Figure 5

Stress intensity factors for two semi-elliptical cracks and a combined crack under membrane stress, at d1/t=0.2

Grahic Jump Location
Figure 6

Stress intensity factors for two semi-elliptical cracks and a combined crack under membrane stress, at d1/t=0.4

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.

Related eBook Content
Topic Collections

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