Hexachiral truss-core with twisted hemp yarns: Out-of-plane shear properties

被引：45

作者：

Cicala, G. ^{[2
]}

Recca, G. ^{[2
]}

Oliveri, L. ^{[2
]}

Perikleous, Y. ^{[3
]}

Scarpa, F. ^{[1
]}

Lira, C. ^{[1
]}

Lorato, A. ^{[1
]}

Grube, D. J. ^{[4
]}

Ziegmann, G. ^{[4
]}

机构：

[1] Univ Bristol, ACCIS, Bristol BS8 1TH, Avon, England

[2] Univ Catania, DIIM, I-95124 Catania, Italy

[3] Univ Bristol, Engn Design Programme, Bristol BS8 1TH, Avon, England

[4] Tech Univ Clausthal, Inst Polymerwerkstoffe & Kunststofftech, D-38678 Clausthal Zellerfeld, Germany

来源：

COMPOSITE STRUCTURES | 2012年 / 94卷 / 12期

关键词：

Auxetic; Biocomposite; Truss-core; Mechanical properties; ELASTIC-CONSTANTS; RATIO; BEHAVIOR; SUPERIOR;

D O I：

10.1016/j.compstruct.2012.05.020

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

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.

引用

页码：3556 / 3562

页数：7

共 38 条

[1] Smart tetrachiral and hexachiral honeycomb: Sensing and impact detection [J].