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《Modular Machine Tool & Automatic Manufacturing Technique》 2011-01
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Research on Fatigue crack growth Life of Ultra-High Strength Steels in VHCF

LIU Dong-xing,TAO Hua,XUE Hong-qian,TANG Xing-ling(NPU-UTC Sino-French Common Research Group Virtual Prototyping for Design and Fabrication,Xi'an 710072,China)  
Based on Paris crack growth theory,because of the different of the rate of crack growth in different ranges,we divide the crack growth life into three ranges:below threshold corner growth,small crack growth and long crack growth.Integration of Paris formula in each range,then add the three ranges into together,we will get the total life of crack growth.Compared to Paris formula,this method gets higher life of crack growth.But all of them cannot discredit the fact:the total fatigue life is decided by the initial of crack,and the life of crack growth is much less than the experimental life.
【Fund】: 国家自然科学基金(50775182);; 教育部留学人员科研启动基金资助
【CateGory Index】: TG142.15
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