The aim of this paper is to review and compare the response to the electromagnetic radiation of different structural or non-structural composites on absorption, reflections and re-reflection grades. The area of interest has been reduced to the carbon allotropy and conducting non-magnetic/magnetic fillers (inclusions, metallic powders, granular ferrites) in dielectric hosts characterized by existing mixing rules. The results could be grouped in distinctive ranges, SE ≤ 10 dB corresponding to a poor shielding, 10–30 dB describing an acceptable effectiveness and SE ≥ 30 dB exceeding the acceptable range for industrial and commercial applications of 20 dB.
This paper presents computational matrix strain increase factors in case of parallel hexagonal shape disposed fibers in unidirectional fibers-reinforced laminae subjected to transverse loadings. Matrix strain increase factors for two shapes of disposed fibers in a unidirectional glass and HM-carbon fibers-reinforced epoxy resin lamina are given. A comparison between matrix strain increase factors in case of square shape and hexagonal shape disposed fibers for these types of laminae are also presented.
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