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Proceedings Paper

Bonding stresses between piezoelectric actuators and elastic beams
Author(s): Wolfgang Seemann; Kai D. Wolf; Alexander Straub; Peter Hagedorn; Fu-Kuo Chang
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Paper Abstract

A beam with piezoceramic elements bonded to the beam's top and bottom surfaces is investigated. Simple pin-force models allow the user to predict the deformation of the beam very well for the static case. As the pin-force models are simple they are well suited for active control algorithms of such structures. In experiments, however a debonding of the ceramics can occur due to high stresses in the bonding layer. The simple pin- force models are not able to predict these stresses. Therefore, a finite element (FEM) calculation is used to estimate the shear and normal stresses. As could be expected a stress concentration occurs at the ends of the ceramics. The maximum stress obtained by the FEM calculations strongly depends on the discretization. The analysis shows that these stresses are moderate in the static case but may be very high if the structure is excited in resonance. In the future a more sophisticated beam model will be developed to get analytic approximations of the interface stresses due to the interaction between the ceramics and the beam.

Paper Details

Date Published: 6 June 1997
PDF: 11 pages
Proc. SPIE 3041, Smart Structures and Materials 1997: Smart Structures and Integrated Systems, (6 June 1997); doi: 10.1117/12.275691
Show Author Affiliations
Wolfgang Seemann, Technische Univ. Darmstadt (Germany)
Kai D. Wolf, Technische Univ. Darmstadt (Germany)
Alexander Straub, Oxford Univ. (Germany)
Peter Hagedorn, Technische Univ. Darmstadt (Germany)
Fu-Kuo Chang, Stanford Univ. (United States)

Published in SPIE Proceedings Vol. 3041:
Smart Structures and Materials 1997: Smart Structures and Integrated Systems
Mark E. Regelbrugge, Editor(s)

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