The traditional method for the fatigue strength assessment of ship structures is based on S-N curves and Miner linear cumulative damage rules. However, with the development of the ship mechanics, the fracture mechanics method has aroused people’s attention. Some researchers have begun to use the fracture mechanics method to perform the fatigue strength assessment of ship structures. A fracture mechanics based approach for the fatigue assessment of ship structures in random sea states is presented. First, the fatigue stress history of the ship structures in random sea states is simulated. Then, the stress intensity factor in random sea states is calculated through the weight function and the fatigue stress of the ship structures in random sea states. Finally, the crack growth is calculated using Pairs equation for each stress cycle throughout the fatigue stress history of the ship structures in random sea states.
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ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering
July 1–6, 2012
Rio de Janeiro, Brazil
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4489-2
PROCEEDINGS PAPER
The Fatigue Crack Propagation of the Ship Structures in Random Sea States
Guoqing Feng,
Guoqing Feng
Harbin Engineering University, Harbin, Heilongjiang, China
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Junwei Cao,
Junwei Cao
China Ship Development and Design Center, Wuhan, Hubei, China
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Huilong Ren,
Huilong Ren
Harbin Engineering University, Harbin, Heilongjiang, China
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Hui Li
Hui Li
Harbin Engineering University, Harbin, Heilongjiang, China
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Guoqing Feng
Harbin Engineering University, Harbin, Heilongjiang, China
Junwei Cao
China Ship Development and Design Center, Wuhan, Hubei, China
Huilong Ren
Harbin Engineering University, Harbin, Heilongjiang, China
Hui Li
Harbin Engineering University, Harbin, Heilongjiang, China
Paper No:
OMAE2012-83073, pp. 39-44; 6 pages
Published Online:
August 23, 2013
Citation
Feng, G, Cao, J, Ren, H, & Li, H. "The Fatigue Crack Propagation of the Ship Structures in Random Sea States." Proceedings of the ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. Volume 2: Structures, Safety and Reliability. Rio de Janeiro, Brazil. July 1–6, 2012. pp. 39-44. ASME. https://doi.org/10.1115/OMAE2012-83073
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