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Preliminary communication The paper presents the results of the research undertaken to determine the impact of the epoxy adhesive nanofiller, in the form of multiwall carbon nanotubes (MWCNT), on the fatigue strength and fatigue lifetime of adhesive joints subjected to peel. Carbon nanotubes were synthesized by means of CVD method with Fe-Co catalysts. Three variants of filled epoxy adhesive were considered, the quantity of 0.5 wt.%, 1.0 wt.%, 1.5 wt.% were used. Such compositions went through the process of mixing, ensuring the adequate nanotubes dispersion. The prepared composition was used to join two adherends made of 2024-T3 aluminium alloy. Adhesive joints underwent high-cycle fatigue peel strength tests with the limit number of cycles of 2 million. The tests were carried out on the electromagnetic vibration inductor with the resonance frequency of the flexible adhesive-joined element of about 600 Hz. For each variant, the fatigue curve and fatigue lifetime were determined for a given level of stress. Thanks to adding carbon nanotubes to epoxy adhesives, the possibility of increasing the fatigue strength by 28.9 % and the fatigue lifetime by about 477.2 % was discovered. The fatigue strength tests were preceded by static T-peel tests.

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Influence of multi-walled carbon nanotubes (MWCNT) on the static and high-cycle fatigue properties of adhesive joints of 2024-T3 aluminium alloy subjected to peel