Experimental Study on Propagation Rule of Semi-elliptical Surface Crack in Steel Plate Strengthened with FRP under Cyclic Bending Load
Strengthening steel structures containing semi-elliptical surface crack with fiber reinforced polymer (FRP) can delay crack propagation,and increase the service life of structures.In this paper,carbon fiber laminate (CFL),which has independent intellectual property,was adopted to strengthen X80 steel plate containing a 3D semi-elliptical surface crack,and based on this study object,the surface crack propagation rule in the specimens was studied by experimental method under cyclic bending loads.The results show that 3D semi-elliptical surface crack propagation rates in the crack length direction and crack depth direction can be described by corresponding Paris equation for the specimens strengthened with CFL,the constant coefficients in Paris equation can be obtained by fitting the data from fatigue crack propagation experiments,and stress intensity factor of the surface crack in steel plate strengthened with CFL can be obtained by numerical calculation with FEM.
3D surface crack fiber reinforced polymer (FRP) fatigue crack growth beach-mark stress intensity factor (SIF)
Zhao Chuanyu Huang Peiyan Feng Fajuan Zhou Hao
School of Civil and Transportation,South China University of Technology,Guangzhou 510640,China School of Civil and Transportation,South China University of Technology,Guangzhou 510640,China;State
国际会议
北京
英文
1-6
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）