Analysis of the effects of varying core thicknesses of Kevlar Honeycomb sandwich structures under different regimes of testing

Abstract

This study presents the Experimental characterizations of composite sandwich structures needed to optimize structure design. We fabricated 2 composite sandwich structures; one is having a Kevlar Honeycomb Core of 3 mm thickness and another having a Kevlar Honeycomb Core of 5 mm thickness. Honeycomb sandwich panels had Carbon and Basalt fiber face sheets (2 layers of Carbon of 0.2 mm each and 1 layer of Basalt of 2.34 mm). The mechanical properties of the constituent materials were discovered experimentally using ASTM/ISO standards. After testing a comparison is made of the different properties achieved from the two different specimen having core thickness of 3 mm and 5 mm.by analysis it was observed that Tensile, Flexural and Impact strength increases with increase of core thickness but the hardness decreases. Also water absorption and acid corrosion test were done on two specimens and it was observed that the specimen having the higher thickness will absorb less water and surface destruction due to acid is almost the same in the two specimens.