| Due to anisotropic properties of honeycombs, MIL handbook 17B does not recommend ASTM C393, or 3 point bend test as a valid indicator of honeycomb cored panel behavior. It is viewed as a possible quality control test but not indicative of the real attributes of the structure. It is generally felt that a better indicator would be the ASTM D 6146-99) (Standard Test Method for Two-dimensional Flexural Properties of Simply Supported Sandwich Composite Plates Subjected to a Distributed Load) or also known as “The Hydramat test”. These tests have produced results that validate the accompanying Strength of Materials Data. The viscoelastic behavior of CarbonCore Plastic Honeycomb will typically permit far greater deflections without structural failures so the Deflection at Load is supplied for comparison but this does not imply a Load to fail .Deflection values based on 200lb point load centrally with support on 4 edges. (test specimen 1”wide X6” long,)Information provided by Carbon-Core |
