Journal
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
Volume 45, Issue 2, Pages 657-675Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijsolstr.2007.08.031
Keywords
multistable structures; unsymmetric composites; non-linear finite element analysis
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Funding
- Engineering and Physical Sciences Research Council [GR/R76561/01] Funding Source: researchfish
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This paper models the non-linear flexural response of laminates that have piecewise variation of lay-up in the planform, using finite element analysis. Attention is focused on the effects that thermal stresses have on the potential multiple shapes of a composite structure. Unsymmetric laminates may possess more than a single equilibrium configuration, and during the cool-down the solution thus bifurcates at a critical temperature. In static analyses, numerical solutions are often coaxed to converge into one or the other branch of the solution. A methodology to overcome this problem is presented. Such modelling is necessary to allow application of multistable composite within morphing aircraft structures as multistable composites could provide a viable solution for the realisation of shape-adaptable structures. (c) 2007 Elsevier Ltd. All rights reserved.
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