An Experimental Investigation of Quasi-Static Indentation on A Composite Sandwich Panel Made of Basalt Fiber Using Nano-Graphene

In this paper, the effect of adding graphene particles to resin and the use of basalt fibers in composite sandwich panels on the quasi-static permeation response and energy absorption has been studied. In this study graphene with a 90% degree of purity, 8 layers of basalt fiber with a mass unit area of 350 g / m2, a polyurethane foam core of 1 cm thickness with a mass volume of 80 Kilograms per cubic meters, resin and EPR1080 hardener have been used. The samples of a mass percentage of 0, 0.3, 0.7, 1. graphene have been made. The quasi-static penetration test was performed on the samples by loading at a speed of 8 mm / min. The results of the quasi-static penetration test on the above samples show the improvement of performance in the composite sandwich panel containing graphene. The results show that the best performance is related to the 0.7% graphene sample. The samples are tested under SEM testing. The images of this experiment show that in a sample with 0.7% graphene, there is a better microscopic structure than other samples. The sample with 0.7% graphene has the highest energy absorption before the failure of the composite sandwich panel and the least damage after full penetration.