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Prediction of Mechanical Properties of Honeycomb Core Materials and Analysis of Interlaminar Stress of Honeycomb Sandwich Composite Plate  

김형구 (한양대학교 대학원 기계설계과)
최낙삼 (한양대학교 기계공학과)
Publication Information
Composites Research / v.17, no.1, 2004 , pp. 29-37 More about this Journal
Abstract
Honeycomb sandwich composite(HSC) structures have been widely used in aircraft and military industry owing to their light weight and high stiffness. Mechanical properties of honeycomb core materials are needed for accurate analysis of the sandwich composites. In this study. theoretical formula for effective elastic modulus and Poisson's ratio of honeycomb core materials was established using an energy method considering the bending, axial and shear deformations of honeycomb core walls. Finite-element analysis results obtained by using commercial FEA code, ABAQUS 6.3 were comparable to the theoretical ones. In addition, we performed tensile test of HSC plates and analyzed deformation behaviors and interlaminar stresses through its FEA simulation. An increased shear stress along the interface between surface and honeycomb core layers was shown to be the main reason for interfacial delamination in HSC plate under tensile loading.
Keywords
honeycomb sandwich composite; effective elastic modulus; interfacial delamination; interlaminar stress analysis;
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