Research Papers

Concept and Design of a Multistable Plate Structure

[+] Author and Article Information
Matthew Santer1

Lecturer in Aerostructures Department of Aeronautics,  Imperial College London Prince Consort Road, London, SW7 2AZ, UKm.santer@imperial.ac.uk

Sergio Pellegrino

 Joyce and Kent Kresa Professor of Aeronautics and Professor of Civil Engineering California Institute of Technology, 1200 E. California Boulevard, MC 301-46, Pasadena, CA 91125sergiop@caltech.edu


Corresponding author.

J. Mech. Des 133(8), 081001 (Jul 27, 2011) (7 pages) doi:10.1115/1.4004459 History: Received November 25, 2010; Revised June 17, 2011; Accepted June 22, 2011; Published July 27, 2011; Online July 27, 2011

A concept is presented for a compliant plate structure that deforms elastically into a variety of cylindrical shapes and is able to maintain such shapes due to the presence of bistable components within the structure. The whole structure may be fabricated as a monolithic entity using low-cost manufacturing techniques such as injection molding. The key steps in the analysis of this novel concept are presented, and a functional model is designed and constructed to demonstrate the concept and validate the analysis.

Copyright © 2011 by American Society of Mechanical Engineers
Topics: Force , Structures , Design
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Figure 1

Schematic diagram of structural concept: (a) flat plate and bistable element in configuration 1; (b) curved plate and bistable element in configuration 2

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Figure 2

Cardboard proof-of-concept model in (a) initial configuration: (i) top view and (ii) side view; (b) deformed configuration: (i) top view and (ii) side view

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Figure 3

Two-dimensional geometric model of the multistable plate structure concept

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Figure 4

Free body diagrams and associated bending moment in the plate when a single bistable element is actuated

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Figure 5

Design concept of snap-through strut with stroke of ≈5mm (from Ref. [7])

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Figure 6

Elastic prediction versus measured behavior of snap-through strut (adapted from Ref. [7])

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Figure 7

Initial concept of multistable plate structure with integral snap-through elements

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Figure 8

Two configurations of bistable element in initial concept of multistable plate structure

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Figure 9

Sequential actuation of prototype containing five bistable elements

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Figure 10

Multistable plate structure prototype

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Figure 11

Finite element simulation of force-displacement response of bistable element and restoring force exerted by compliant plate from Eq. 10




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