FRACTURE MECHANICS ANALYSIS OF CRACKED METALLIC PLATES REPAIRED WITH FRP
FRP加固金属裂纹板的断裂力学分析

There are several advantages of adhesively bonded fiber reinforced polymer (FRP) laminates used for the deteriorated metallic members over the traditional retrofit methods susceptible to fatigue crack initiation. The three dimensional "solid-spring-shell element" finite element model is presented in the paper. In the FEM model, the metalic plate is modeled as a solid element, FRP is modelled as a shell element and the spring element is used to model the adhesion between the metalic plate and FRP. Linear fracture mechanics analysis of cracked metallic plates repaired with FRP is carried out. Influencing factors on the stress intensity factors at crack tips are discussed. It is shown that the increases in the elastic modulus or the thickness of FRP improve the effectiveness of strengthening significantly.