A NOVEL MECHANICS MODEL FOR FATIGUE CRACK GROWTH UNDER CONSTANT AMPLITUDE LOADING

摘要：

This paper discusses a methodology for the fatigue analysis under constant amplitude (CA) loading. The mechanics mechanism of fatigue crack growth (FCG) was illuminated based on static fracture mechanics with thinking about the inertial effect coefficient and its impact to crack tip caused by alternate loading. And the correlative problems of dynamic fracture mechanics were changed into ones of linear elastic fracture mechanics by dalemberts principle. Thereafter,a mechanics model for FCG under CA loading was proposed. A new expression for the FCG rate has thus been derived. The expression was tested using some couple samples from published experimental results. It is in good agreement with the test results.

关键词： Fatigue crack growth rate Inertial effect coefficient Mechanics model Constant amplitude loading

作者: Zhi-Fang Liu Zhong-Yong Xu Li-Xiong Gu

作者单位: School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,P.R. China

会议类型: 国际会议

会议名称: The Eleventh International Symposium on Structural Engineering(第十一届结构工程国际研讨会)

会议地点: 广州

会议语种:英文

页码: 886-890

在线出版日期: 2010-12-01（万方平台首次上网日期，不代表论文的发表时间）