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Structure and mechanics of the iris leaf |
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| Authors: | L J Gibson M F Ashby K E Easterling |
| Affiliation: | (1) Department of Civil Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, 02139 Cambridge, Massachusetts, USA;(2) Engineering Department, Cambridge University, Trumpington Street, CB2 1PZ Cambridge, UK;(3) Department of Engineering Materials, University of Lueå, S-95187 Luleå, Sweden |
| Abstract: | The structure of the iris leaf resembles that of a sandwich beam with fibre composite faces separated by a low-density foam core. Such structures have a high specific stiffness because the separation of the faces by the lightweight core increases the moment of inertia of the section with little increase in weight. In this paper we examine the structure of the leaf of the bearded iris and show that its flexural stiffness can be explained in terms of the mechanics of sandwich beams. |
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