Journal
COMPOSITE STRUCTURES
Volume 94, Issue 12, Pages 3556-3562Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2012.05.020
Keywords
Auxetic; Biocomposite; Truss-core; Mechanical properties
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Funding
- Chismatech s.r.l.
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This work describes a truss-core structure made of hemp/epoxy biocomposite based on a topology with auxetic (negative Poisson's ratio) characteristics. Epoxy-based composites with 25 wt.% of hemp yarns have been manufactured and characterized with tensile and flexural tests. Truss-core hexagonal chiral panels with the biocomposite core have been produced using a Resin Transfer Molding technique. The panels have been subjected to standard transverse shear tests, and their properties predicted with a Finite Element nonlinear modeling. The results show that the hexachiral biocomposite truss core exhibits specific shear modulus and strength significantly higher compared to the ones observed in previous demonstrators made of polymeric core. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.
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