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Applicability of Net-Section Collapse Load Approach to Multiple-Cracked Pipe Assessment: Numerical Study.

Authors :
Myeong-Woo Lee
So-Dam Lee
Yun-Jae Kim
Source :
Journal of Pressure Vessel Technology; Aug2017, Vol. 139 Issue 4, p1-9, 9p
Publication Year :
2017

Abstract

In this paper, applicability of net-section collapse load approach to circumferential multiple-cracked pipe assessment is investigated using finite element (FE) damage analysis. The FE damage analysis based on the stress-modified fracture strain model is validated against limited fracture test data of two circumferential surface-cracked pipes. Then, the systematic parametric study is performed using the FE damage analysis for symmetrical and asymmetrical surface-cracked pipes. It is found that predictions using the net-section collapse load approach tend to be more accurate with increasing the distance between two symmetrical cracks. For asymmetrical cracks, it is found that the deeper crack plays a more important role and that the existing net-section collapse load expression can be potentially nonconservative. Idealization to symmetrical cracks based on the deeper crack is proposed. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00949930
Volume :
139
Issue :
4
Database :
Supplemental Index
Journal :
Journal of Pressure Vessel Technology
Publication Type :
Academic Journal
Accession number :
123515258
Full Text :
https://doi.org/10.1115/1.4036656