Fatigue crack growth modelling for cracked small-scale structural details repaired with CFRP

• Type: Article in International Scientific Journal
• Date: 2021

Authors

Anis Mohabeddine (Author) Other; José A. F. O. Correia (Author) FEUP; Pedro Aires Montenegro (Author) FEUP; José M. Castro (Author) FEUP

Journal

Title: Thin-Walled Structures

Vol. 161

Pages: 1-15

ISSN: 0263-8231

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 3 Citations

Other information

Authenticus ID: P-00T-G6H

DOI: 10.1016/j.tws.2021.107525

Abstract (EN): This paper presents an analytical model to predict the mode I fatigue crack growth of steel Central Cracked Tensile (CCT) specimens repaired with Carbon Fiber Reinforced Polymer (CFRP) bonded on the two sides of the plate. A review of the behaviors observed in past experimental tests is provided. The CFRP-steel stiffness ratio, as well as the level of the initial crack length and the location of the CFRP patch, influence the performance of the CFRP crack repair. A total of 69 experimental and 7 numerical results of CFRP repaired specimens were collected from the literature and a database is created. Seventy percent of the data (Experimental only) were used for the development of the model and thirty percent for verification. The fatigue crack propagation of each pair of unrepaired and repaired experimental specimens was calibrated for the development of the model. The effect of the CFRP on the fatigue crack propagation is represented by a SIF reduction factor, ?. An analytical law based on nonlinear regression analysis is proposed to evaluate ? which depends on the CFRP-steel ratio, level of damage of the steel plate, and patch location. The model is fairly validated with experimental and numerical results. A parametric study is conducted for further verification, the model shows reasonable trends.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 15