摘要
针对低温下船用HTS-A钢的疲劳裂纹扩展行为,本文采用25 mm厚HTS-A钢CT试样为研究对象,开展常温及不同低温环境下疲劳裂纹扩展试验。在试验研究的基础上,提出包含温度项的改进McEvily公式的低温疲劳裂纹扩展预报方法。结果表明:随着温度的降低,HTS-A钢的疲劳裂纹扩展速率逐渐降低。在-60℃时,HTS-A钢的低温疲劳裂纹扩展速率没有出现低温脆断,试验结果可为船用HTS-A钢低温疲劳设计提供数据参考。同时,分别采用本文HTS-A钢低温试验数据和文献中的钛合金低温试验数据验证低温疲劳裂纹扩展速率预报方法的合理性及正确性,该方法可用于预报不同低温环境下金属疲劳裂纹扩展速率。
Aiming at the fatigue crack growth behavior of marine HTS-A steel at low temperature,the CT sample of HTS-A steel with a thickness of 25 mm was adopted in this paper,and the fatigue crack growth tests at room temperature and different low temperature environments were carried out.On the basis of ex⁃perimental research,a low-temperature fatigue crack growth prediction method with improved McEvily for⁃mula including temperature term was proposed.The results show that the fatigue crack growth rate of HTS A steel decreases gradually with the temperature decrease.At-60℃,the low temperature fatigue crack growth rate of HTS-A steel does not show low temperature brittle fracture,and the test results provide data reference for the low temperature fatigue design of marine HTS-A steel.At the same time,the low tempera⁃ture test data of HTS-A steel in this paper and the low temperature test data of titanium alloy in the litera⁃ture were used to verify the rationality and correctness of the low temperature fatigue crack growth rate pre⁃diction method.The method can be used to predict the metal fatigue crack growth rate in different low tem⁃perature environments.
作者
刘家奇
罗广恩
潘广善
刘俊成
李爽
张帅
LIU Jia-qi;LUO Guang-en;PAN Guang-shan;LIU Jun-cheng;LI Shuang;ZHANG Shuai(School of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China;China Ship Scientific Research Center,Wuxi 214082,China)
出处
《船舶力学》
EI
CSCD
北大核心
2024年第2期273-282,共10页
Journal of Ship Mechanics
基金
国家自然科学基金面上项目(52171312)
水路交通控制全国重点实验室开放课题资助项目(QZ2022-Y012)。
