Abstract: Honeycomb sandwich composites were prepared by using three brands of unidirectional prepreg, one type of multi-surface density adhesive film and a type of Nomex honeycomb core, through a hot-pressing process. The paper studies the effect of the surface density of adhesive film on climb drum peeling of honeycomb sandwich panel, and the factors which affect the long beam bending, panel shearing (three-point bending) and insert shearing. When using the same Nomex honeycomb core material, the results are as follows. The surface density of the adhesive film has obvious influence on the climb drum peeling performance of the honeycomb sandwich panel. The long beam bending load of the honeycomb sandwich panel is mainly affected by the performance of the prepreg. The deflection under 450 N load is controlled by the modulus of prepreg after curing. The effect of prepreg and adhesive film on the performance of panel shearing of sandwich panel is small. The performance of insert shearing has nothing to do with the surface density of the adhesive film.

Key words: Nomex honeycomb, mechanical properties, surface density of ashesive film, composites, hot-pressing molding