A practical stress intensity factor formula for CFRP-repaired steel plates with a central crack

被引：13
作者：
Liu, Ruoyu [1 ,2 ]
Chen, Tao [1 ,2 ,3 ]
Li, Lingzhen [1 ,2 ]
Tateishi, Kazuo [4 ]
机构：
[1] Tongji Univ, Key Lab Performance Evolut & Control Engn Struct, Minist Educ, Shanghai 200092, Peoples R China
[2] Tongji Univ, Dept Struct Engn, Shanghai 200092, Peoples R China
[3] Univ Corp Polar Res, Beijing 100875, Peoples R China
[4] Nagoya Univ, Dept Civil & Environm Engn, Nagoya, Aichi 4648603, Japan
来源：
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH | 2019年 / 162卷
基金：
中国国家自然科学基金;
关键词：
Stress intensity factor; Central crack; CFRP; Practical formula; Fatigue life; FATIGUE BEHAVIOR; GROWTH;
D O I：
10.1016/j.jcsr.2019.105755
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
In this paper, the effects of carbon fiber reinforced polymer (CFRP) repairing on fatigue life improvement of center cracked steel plates was intensively studied. Generally, stress intensity factors (SIFs) were calculated using numerical approaches and employed to predict fatigue cycles via classical crack propagation models. We proposed a practical SIF formula based on thorough finite element (FE) analysis of 1254 CFRP-repaired specimens. The analyses were carried using Python Script in order to achieve a high FE modeling and calculating efficiency. A correction coefficient F-C. representing the CFRP repairing effect, was introduced in the formula to calculate SIFs at the crack tip. Thereafter, the formula were employed to predict the fatigue lives of CFRP repaired steel plates together with the Elber model. Good consistency was achieved with test results. (C) 2019 Elsevier Ltd. All rights reserved.
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页数：10
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