Numerical Analysis of KI of Semi-elliptical Surface Crack in X80 Steel Plate Strengthened with FRP under Tensile Load

摘要：

　　Semi-elliptic surface crack is the common defect in metal structures.To ensure the structural integrity and security,the new material such as fiber reinforced polymer (FRP) was adopted for strengthening and repairing.In this paper,three dimensional semi-elliptic surface crack in X80 steel tension specimen strengthened with carbon fiber laminate (CFL) was studied,and numerical analysis was undertaken by Abaqus finite element software to study the stress intensity factor (SIF,KI) of the surface crack for CFL reinforcement effect.The results shown that,strengthening by CFL reduced the stress intensity factors of semi-elliptical surface crack significantly; Crack shape ratio a/c and crack relative depth a/B had a great effect on stress intensity factors of strengthened specimen; An expression for calculating stress intensity factors of semi-elliptic surface crack under strengthening condition was obtained by adopting MATLAB software.

关键词： surface crack fiber reinforced polymer (FRP) stress intensity factor (SIF) numerical analysis

作者: Zheng Xiaohong Huang Peiyan Zhao Chuanyu Zhou Hao

作者单位: 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

会议类型: 国际会议

会议名称: 第13届国际断裂大会(ICF2013)

会议地点: 北京

会议语种:英文

页码: 1-7

在线出版日期: 2013-06-16（万方平台首次上网日期，不代表论文的发表时间）