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Proceedings Paper

Adaptive structures: some materials and structural issues
Author(s): Donald Roberts; Peter A. Lloyd; P. Hopgood; Steve W. Mahon; A. R. Bowles
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Paper Abstract

The concept of using embedded or surface-bonded solid-state actuators to effect shape change in carbon fibre composite laminates continues to have technical merit and appeal. Conventional laminate design methods tend to lead to stiff structures, whilst it is easiest to impose a change of shape on a compliant structure. This presents a possible conflict of design and suggests that the useful performance of solid- state actuators will always be limited by the stiffness of the host laminate. One possible solution is to increase the in-plane work capacity of the actuators either by using improved materials such as phase change perovskites like PLZT or improved eletroding techniques such as inter-digitated electrodes (IDEs). In this study, the performance of several different actuator/laminate systems have been modelled to determine a baseline capability in pure bending. Four cases have been considered for different panel thicknesses and lay-up sequences. The materials performance and IDE design issues have also been addressed. Modelling indicates that even with conventional actuator materials, structural displacements can be produced which could provide useful shape change in applications such as missile roll control.

Paper Details

Date Published: 24 August 2000
PDF: 13 pages
Proc. SPIE 4073, Fifth European Conference on Smart Structures and Materials, (24 August 2000); doi: 10.1117/12.396395
Show Author Affiliations
Donald Roberts, Defence Evaluation and Research Agency Farnborough (United Kingdom)
Peter A. Lloyd, Defence Evaluation and Research Agency Farnborough (United Kingdom)
P. Hopgood, Defence Evaluation and Research Agency Farnborough (United Kingdom)
Steve W. Mahon, Defence Evaluation and Research Agency Farnborough (United Kingdom)
A. R. Bowles, Defence Evaluation and Research Agency Farnborough (United Kingdom)


Published in SPIE Proceedings Vol. 4073:
Fifth European Conference on Smart Structures and Materials
Pierre Francois Gobin; Clifford M. Friend, Editor(s)

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