Bistable composite laminates: Effects of laminate composition on cured shape and response to thermal load

被引：97

作者：

Giddings, Peter F. ^{[1
]}

Bowen, Christopher R. ^{[1
]}

Salo, Aki I. T.

Kim, Hyunsun A. ^{[1
]}

Ive, Alan ^{[1
]}

机构：

[1] Univ Bath, Dept Mech Engn, Bath BA2 7AY, Avon, England

来源：

COMPOSITE STRUCTURES | 2010年 / 92卷 / 09期

关键词：

Composite structures; Bistable laminates; Finite element; Experimental mechanics; Thermal stress; RESIDUAL-STRESS DEVELOPMENT; ROOM-TEMPERATURE SHAPES; SNAP-THROUGH; MULTISTABLE COMPOSITES; PIEZOCERAMIC ACTUATORS; DESIGN; SHELLS;

D O I：

10.1016/j.compstruct.2009.08.043

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

This paper develops a finite element (FE) approach using commercial ANSYS V11.0 software to accurately predict the cured shape of bistable composites by including the influence of manufacturing imperfections, such as resin rich areas and ply-thickness variations. Laminate composition was characterised by optical microscopy and their cured shapes measured using a Peak Motus motion analysis system. The FE model accurately predicts observed differences between laminate curvature in the two stable states. Localised reversal of curvature resulting from through-thickness shear stress is also predicted. Structural response to thermal loading was experimentally characterised showing a temperature dependent deflection rate and a residual curvature caused by non-reversible residual stresses. FE-predictions show good agreement with experiment over the range 20-110 degrees C. The presented data highlights the importance of manufacturing processes and materials selection in the design of thermally stressed multi-stable composite structures. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：2220 / 2225

页数：6

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