The 45-degree laterals are widely used in pressure vessel nozzles and piping branch connections. Though the pressure design is always important for the 45-degree laterals, it is not a simple work because it has severe stress concentrations, it is difficult to weld and inspect, and there are some discrepancy between a conventional design and design by linear and nonlinear finite element analysis. In previous papers, authors studied the characteristics of both 90 degree tee and 45 degree laterals using an inelastic finite element analysis based on simplified shell element models and proposed Collapse Strength Reduction Factor (CSRF) based on an inelastic analysis were compared. In this paper, results of the burst test of 45-degree lateral and 90 degree intersection were shown. The fracture surface of 45-degree lateral was different from that of 90-degree intersection. These experimental results are compared with the inelastic finite element analysis results focusing on the local stress and strain behaviors. It was found that the magnitude of the local strain affected the burst pressure. Consideration should be given on the local failure due to excessive plastic strain under high stress triaxiality for the design of the 45-degree lateral by inelastic analysis.
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ASME 2014 Pressure Vessels and Piping Conference
July 20–24, 2014
Anaheim, California, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-4600-1
PROCEEDINGS PAPER
Experimental and Analytical Study for Collapse Characteristics of 45 Deg Cylinder-to-Cylinder Intersections
Shunji Kataoka,
Shunji Kataoka
JGC Corporation, Yokohama, Japan
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Takuro Honda,
Takuro Honda
JGC Corporation, Yokohama, Japan
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Masashi Takeda,
Masashi Takeda
JGC Corporation, Yokohama, Japan
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Toshiya Tanimoto
Toshiya Tanimoto
JGC Corporation, Yokohama, Japan
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Shunji Kataoka
JGC Corporation, Yokohama, Japan
Takuya Sato
JGC Corporation, Yokohama, Japan
Takuro Honda
JGC Corporation, Yokohama, Japan
Masashi Takeda
JGC Corporation, Yokohama, Japan
Toshiya Tanimoto
JGC Corporation, Yokohama, Japan
Paper No:
PVP2014-28838, V003T03A035; 7 pages
Published Online:
November 18, 2014
Citation
Kataoka, S, Sato, T, Honda, T, Takeda, M, & Tanimoto, T. "Experimental and Analytical Study for Collapse Characteristics of 45 Deg Cylinder-to-Cylinder Intersections." Proceedings of the ASME 2014 Pressure Vessels and Piping Conference. Volume 3: Design and Analysis. Anaheim, California, USA. July 20–24, 2014. V003T03A035. ASME. https://doi.org/10.1115/PVP2014-28838
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