Document Type : Original Manuscript
Authors
1 Ocean Engineering Department, Texas A&M University, Texas, USA
2 Department of Marine Engineering, Faculty of Engineering, Persian gulf university, Bushehr, Iran
Abstract
Among the wide range of new industrial materials in the design process under-load structures, Honeycomb composites are said to be one of the best substitutes for common materials used in different industries. In the first part of the present work, three different core cell configurations were chosen as the core cells of a sandwich beam. Then, the effect of core cells’ shape on the mechanical behavior of each structure has numerically been investigated. In the first stage, the vibration of each beam has been investigated by taking advantage of Modal analysis. In the second part, by changing the core height in different cases, the effect of core thickness on the mechanical behavior of honeycomb composites has been studied. The results show that natural frequencies, deflections, and the strength-to-weight ratio of configurations: rectangular, honeycomb, and triangular have been in descending order. Deflection and Von-Mises stress were the results obtained from simulating each model as a cantilever beam. By increasing the core thickness even more, despite the weight being increased, the beam deflection decreases, and the load-bearing and strength of the structure get increased. In the case of the similar thickness of the isotropic plate and the honeycomb composite, the bending stiffness can be enhanced to 7 times at the expense of just a 25% volumetric increase. The comparison and validation of the obtained numerical results with the empirical result show that with just a 4% difference, the results do have a close agreement.
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