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.
Original language | English |
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Article number | 041208 |
Journal | Journal of Pressure Vessel Technology, Transactions of the ASME |
Volume | 139 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2017 Aug 1 |
Keywords
- finite element damage analysis
- multiple-cracked pipe
- Net-section collapse load approach
- stress-modified fracture strain
ASJC Scopus subject areas
- Safety, Risk, Reliability and Quality
- Mechanics of Materials
- Mechanical Engineering