The study of interlaminar fracture resistance of NH2-CNT reinforced fiber metal laminates using modified asymmetric DCB geometry

This paper studies the incorporation effect of amino-functionalized carbon nanotubes (CNTs) on the interlaminar fracture energy of carbon fiber Aluminum (Al) laminate. The paper also tries to decrease asymmetry of fiber metal laminates (FMLs) when subjected as a double cantilever beam (DCB) specimens to study the interlaminar resistance between metallic and polymeric layers in mode I. For an asymmetric specimen, the mixed-mode (I+II) interlaminar fracture energy instead of pure mode I is appeared. Therefore in the current research a carbon fiber Al laminate with sub-layer sequence of Al/[C]02/Al/[C]02 was proposed instead of traditional Al/[C]04/Al DCB specimen. It was observed that by applying geometry correction, the angle of asymmetry decreased from 5° to 2° at crack length of 100 mm. The presence of 0.2 wt% of functionalized-CNTs in the interface between Al and polymeric layers increased 34% of critical fracture energy (GIC) in the FML

کلیدواژه ها:

carbon fabric ، DCB delamination ، FML ، interlaminar resistance ، interface