Título

EXPERIMENTAL CHARACTERIZATION OF CARBON-EPOXY COMPOSITE MATERIAL FLEXURAL RIGIDITY

EXPERIMENTAL CHARACTERIZATION OF CARBON-EPOXY COMPOSITE MATERIAL FLEXURAL RIGIDITY

Autoria

Salerno, Gigliola; Araujo, Gabriel P. de

DOI

10.5151/1516-392X-30900

Downloads

Baixar Artigo 337 Downloads

Resumo

The carbon-epoxy composite has high specific resistance and strength, which means specific applications. However, its behavior under compressive stress could be decreased by delamination, needing more detailed studies. The main purpose of the present work is to verify the mechanical properties in bending process considering two different fiber orientations. The composite materials were made by woven fibers and epoxy resin. Primarily, the carbon fiber fabrics suffered a superficial physical treatment called silanization, in order to developing a better chemical adhesion between fibers and resin. After the superficial treatment, the layers were embedded with epoxy resin. The composite resin’s cure was made in a Fanem heater, model 320, during 1 hour at 120°C at 1.5 bar; subsequently the specimens were cut by water jet. Specimens oriented in 0°/90° and 0°/90°/45 were manufactured and taken to bending tests, accordingly to the ASTM E855 and D790 standards, in an universal testing machine MTS – Material Test System, full capacity of 250 kN. It was concluded that all specimens failed by tension. Specimens with internal void volumes results in lower flexural modulus and those with presence of fracture mechanisms, like delamination, showed lower strength values. Scanning Electronic Microscopy demonstrated the damages involved during bending process.

 

Palavras-chave

Laminated, Carbon-epoxy, Bending, Orientation

Laminated, Carbon-epoxy, Bending, Orientation