Vibration effects on tensile properties of adhesively bonded single lap joints in composite materials

摘要

The aim of this study is to investigate the effects of cyclic-vibration-loading on failure loads of adhesively bonded composites. For this purpose, experimental studies were performed for composite adherents with single lap joint. Manufactured eight-layered E/glass-epoxy composite plates with single lap joints were subjected to dynamic cyclic loading via vibration motor, which delivered a force of 160 N at a frequency of 50 Hz. and then tested under tensile loading to investigate the joint strength. The behavior of adhesively bonded joints under various vibration cycles was observed and failure mechanisms of joints were also discussed. It was observed that a significant decrement in the strength of the vibrated joints when compared with that of the non-vibrated joints. However, the joint performance increased up to a certain value of vibration load cycle. After a certain value of vibration load cycle, the joint performance dropped suddenly. Besides, the light-fiber-tear failure was observed in the overlap region of all joints. POLYM. COMPOS., 40:1258-1267, 2019. (c) 2018 Society of Plastics Engineers