Adhesively bonded composite reinforcement against fatigue crack propagation in the case of old steel structures
LEPRETRE ; CHATAIGNER ; DIENG ; GAILLET
Type de document
COMMUNICATION AVEC ACTES INTERNATIONAL (ACTI)
Langue
anglais
Auteur
LEPRETRE ; CHATAIGNER ; DIENG ; GAILLET
Résumé / Abstract
After corrosion, fatigue phenomenon is the main cause of damage in old metallic structures. Fatigue cracks appear in stress concentration area subject to high stresses, and can lead to the ruin of the bridge. The main objective of the present work realized in the framework of the Phd Thesis of E. Lepretre (Lepretre, 2017) was to study the effectiveness of adhesively bonded carbon fibre reinforced polymer (CFRP) laminates in reinforcing fatigue crack emanating from rivet hole. Thus, investigations on small-scale specimens were done. These specimens consist of metallic plates with center hole from which one single crack emanates. Two metallic materials, puddled iron and mild steel, and different reinforcement processes were used. First, the quality of stress transfer on old steel materials was assessed. Then, specific experimental procedures were set up in order to investigate the ability of such technique to reinforce steel elements against crack propagation. Different schemes of reinforcement have been assessed and the obtained results are given in the last part.
