Surface Crack Propagation Rules of CFL-Strengthened Steel Plate under Fatigue Loading

International Conference on Manufacturing Technology, Materials and Chemical Engineering

机械制造;材料科学;化学工业

Yang, Yi^1 ; Huang, Chihui^1 ; Huang, Peiyan^1

School of Civil Engineering and Transportation, South China University of Technology, Guangzhou

510641, China^1

关键词: Carbon fiber laminate;    Common materials;    Crack propagation rate;    Elliptical surfaces;    Fiber reinforced polymers;    Propagation rule;    Reinforcement method;    Structural mechanics;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/392/2/022028/pdf
DOI  :  10.1088/1757-899X/392/2/022028

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Steel is a kind of common materials in construction. Surface crack in steel components can reduce the bearing capacity and durability of steel structures, so it is important to strengthen the steel components with crack defects. Strengthening with fiber reinforced polymer (FRP) is a reliable reinforcement method to improve structural mechanics properties. This paper presents an experimental study on surface crack propagation rules. Carbon fiber laminate (CFL) is adopted to strengthen X80 steel plate with a semi-elliptical surface pre-crack. Specimens are tested under cyclic bending load and fatigue lives, crack lengths and depths in various stages, and crack propagation rates are discussed.