0
Design and Analysis

An Investigation of the Stress Intensity Factor Along a Corner Crack in Pressurizer Vent Nozzle Penetration Weld

[+] Author and Article Information
Sang-Min Lee1

Mechanical, Structural and Materials Engineering Department,  Korea Institute of Nuclear Safety (KINS), 62 Gwahak-ro, Yuseong-gu, Daejeon 305–338, Republic of Koreasangmin.lee@kins.re.kr

Jeong-Soon Park, Jin-Su Kim, Young-Hwan Choi, Hae-Dong Chung

Mechanical, Structural and Materials Engineering Department,  Korea Institute of Nuclear Safety (KINS), 62 Gwahak-ro, Yuseong-gu, Daejeon 305–338, Republic of Korea

1

Corresponding author.

J. Pressure Vessel Technol 134(3), 031201 (May 18, 2012) (5 pages) doi:10.1115/1.4006350 History: Received December 15, 2010; Revised March 07, 2012; Published May 17, 2012; Online May 18, 2012

Elastic–plastic fracture mechanics as well as linear-elastic fracture mechanics may be applied to evaluate a flaw in ferritic low alloy steel components for operating conditions when the material fracture resistance is controlled by upper shelf toughness behavior. In this paper, the distribution of the stress intensity factor (SIF) along a corner crack using elastic–plastic fracture mechanics technique is investigated to assess the effect of a structural factor on mechanical loads in pressurizer vent nozzle penetration weld. For this purpose, the stress intensity factor and the plastic-zone correction of a corner crack are calculated under internal pressure, thermal stress, and residual stress in accordance with Electric Power Research Institute (EPRI) equation and Irwin’s approach, respectively. The resulting stress intensity factor and the plastic-zone correction were compared with those obtained from Structural Integrity Associates (SIA) and Kinectrics Inc., and were observed to be in good agreement with Kinectrics results.

FIGURES IN THIS ARTICLE
<>
Copyright © 2012 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Schematic illustration for a vessel head with an axial crack

Grahic Jump Location
Figure 2

Hoop stress along 45 deg direction line: (a) location to extract the hoop stress and (b) residual, pressure, and thermal stresses

Grahic Jump Location
Figure 3

Hoop stress along 90 deg direction line: (a) location to extract the hoop stress and (b) residual, pressure, and thermal stresses

Grahic Jump Location
Figure 4

The resultant stress intensity factor without plastic-zone correction: (a) case 1: 45 deg direction line and (b) case 2: 90 deg direction line

Grahic Jump Location
Figure 5

The resultant stress intensity factor due to internal pressure considering structural factor of 1

Grahic Jump Location
Figure 6

The plastic-zone radius considering structural factor of 1, 2, and 3: (a) case 1: 45 deg direction line and (b) case 2: 90 deg direction line

Grahic Jump Location
Figure 7

The total stress intensity factor among KINS, SIA, and Kinectrics using structural factor of 2 and 3 with plastic-zone correction of ry 2 and ry 3 : (a) case 1: 45 deg direction line and (b) case 2: 90 deg direction line

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 Journal Articles
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