The in-plane linear elastic constants and out-of-plane bending of 3-coordinated ligament and cylinder-ligament honeycombs

被引：214

作者：

Alderson, A. ^{[1
]}

Alderson, K. L. ^{[1
]}

Chirima, G. ^{[1
]}

Ravirala, N. ^{[1
]}

Zied, K. M. ^{[1
]}

机构：

[1] Univ Bolton, Ctr Mat Res & Innovat, Bolton BL3 5AB, England

来源：

COMPOSITES SCIENCE AND TECHNOLOGY | 2010年 / 70卷 / 07期

关键词：

Smart materials; Mechanical properties; Deformation; Elastic properties; Finite element analysis (FEA); DESIGN;

D O I：

10.1016/j.compscitech.2009.07.010

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

Four novel cylinder-ligament honeycombs are described, where each cylinder has 3 tangentially-attached ligaments to form either a hexagonal or re-entrant hexagonal cellular network. The re-entrant cylinder-ligament honeycombs are reported for the first time. The in-plane linear elastic constants and out-of-plane bending response of these honeycombs are predicted using finite element (FE) modelling and comparison made with hexagonal and re-entrant hexagonal honeycombs without cylinders. A laser-crafted re-entrant cylinder-ligament honeycomb is manufactured and characterized to verify the FE model. The re-entrant honeycombs display negative Poisson's ratios and synclastic curvature upon out-of-plane bending. The hexagonal and 'trichiral' honeycombs possess positive Poisson's ratios and anticlastic curvature. The 'anti-trichiral' honeycomb (short ligament limit) displays negative Poisson's ratios when loaded in the plane of the honeycomb, but positive Poisson's ratio behaviour (anticlastic curvature) under out-of-plane bending. These responses are understood qualitatively through considering deformation occurs via direct ligament flexure and cylinder rotation-induced ligament flexure. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1034 / 1041

页数：8

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