Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Fractographic analysis of co-bonded carbon fiber reinforced composites joints subjected to mode I delamination
Submission Author:
Núbia Nale Silveira , SP
Co-Authors:
Núbia Nale Silveira, Rita Sales, Camila Brito, Geraldo Cândido, Mauricio Donadon
Presenter: Núbia Nale Silveira
doi://10.26678/ABCM.COBEM2017.COB17-0778
Abstract
In the last few years, applications of polymer matrix composite material reinforced with continuous fibers in the aeronautics industry have increased in a large scale. This type of material stands out from conventional materials in various aspects, such as low weight and high strength; other benefits are obtained in a secondary way, for instance the decrease in fuel consumption in airplanes and space rockets. However, problems commonly experienced by conventional metallic structures when mechanically jointed by rivets or bolted joints are also observed in composite structures. resulting in stress concentration around holes and fiber discontinuities. Co-bonded joints, on the other hand, offer significant advantages over mechanical fasteners such as weight and cost reduction, improved fatigue life, enhanced strength and durability, and avoid holes to fix fasteners that promotes stress concentration. To better understand the behavior of composite joints, this work aims to analyze the fracture aspects in co-bonded joints tested under Mode I using a Scanning Electron Microscope (SEM). The results explain how the delamination process occurs in this kind of joint and its relationship with the experimental data and mechanical properties.
Keywords
Fractography, Mode I delamination, Co-bonded joints, Adhesive, Composite, Carbon fiber
