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

Myeong Woo Lee, So Dam Lee, Yun Jae Kim

研究成果: Article査読

2 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号041208
ジャーナルJournal of Pressure Vessel Technology, Transactions of the ASME
139
4
DOI
出版ステータスPublished - 2017 8月 1
外部発表はい

ASJC Scopus subject areas

  • 安全性、リスク、信頼性、品質管理
  • 材料力学
  • 機械工学

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