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Fatigue Crack Growth Behavior of High-strength Steel for Ships
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Yin-hui LEI1, Ke WANG1, Ruo-nan ZHANG2, 3, Yong-zheng LI1, Chuang QIN1, Peng-yu WEI2, 3
Journal of Ship Mechanics | 2025, 29(6) : 952 - 963
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Journal of Ship Mechanics | 2025, 29(6): 952-963
• Structural Mechanics •
Fatigue Crack Growth Behavior of High-strength Steel for Ships
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Yin-hui LEI1, Ke WANG1, Ruo-nan ZHANG2, 3, Yong-zheng LI1, Chuang QIN1, Peng-yu WEI2, 3
Affiliations
  • 1.School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
  • 2.China Ship Scientific Research Center, Wuxi 214082, China
  • 3.Taihu Laboratory of Deepsea Technological Science, Wuxi 214082, China
Published: 2025-06-20 doi: 10.3969/j.issn.1007-7294.2025.06.009
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As a typical steel, the fatigue of marine high-strength steels has been emphasized by scholars. In this paper, the fatigue performance and crack growth mechanism of a high-strength steel for ships are investigated by experimental methods. First, the fatigue threshold test and fatigue crack growth rate test of this high-strength steel under different stress ratios were carried out. The influence of stress ratio on the fatigue properties of this steel was analyzed. Secondly, scanning electron microscope was used to analyze the crack growth specimen section of this steel. The crack growth and failure mechanism of this steel were revealed. Finally, based on the above research results, the stress ratio effect of high-strength steel was investigated from the perspectives of crack closure and driving force. Considering the fatigue behavior in the near-threshold stage and the destabilization stage, a fatigue crack growth behavior prediction model of high-strength steel was established. The accuracy of the model was verified by test data. Moreover, the applicability of the modified model to various materials and its excellent predictive ability were verified through comparison with literature data and existing models.

high-strength steel  /  fatigue test  /  load ratio effect  /  dual-parameter-driving force  /  prediction model
Yin-hui LEI, Ke WANG, Ruo-nan ZHANG, Yong-zheng LI, Chuang QIN, Peng-yu WEI. Fatigue Crack Growth Behavior of High-strength Steel for Ships[J]. Journal of Ship Mechanics, 2025 , 29 (6) : 952 -963 . DOI: 10.3969/j.issn.1007-7294.2025.06.009
Funding
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  • National Natural Science Foundation of China(52071161)
  • National Key Research and Development Program of China(2022YFB3404800)
Appendix
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Year 2025 volume 29 Issue 6
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Article Info
doi: 10.3969/j.issn.1007-7294.2025.06.009
  • Receive Date：2024-12-17
  • Online Date：2026-03-24
  • Published：2025-06-20
Article Data
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History
  • Received：2024-12-17
Funding
National Natural Science Foundation of China(52071161)
National Key Research and Development Program of China(2022YFB3404800)
Affiliations
    1.School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
    2.China Ship Scientific Research Center, Wuxi 214082, China
    3.Taihu Laboratory of Deepsea Technological Science, Wuxi 214082, China

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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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