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Proceedings Paper

Active fatigue control of adhesive bonded joints
Author(s): Craig T. Dempsey; Shi Li; Chen Liang; Craig A. Rogers
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Paper Abstract

This paper investigates the concept of active fatigue control of an adhesively bonded structure. Adhesive bonding has recently become very widely used, especially with the gaining popularity of composite materials. The adhesive bonds are usually the weakest link in the entire bonded structure. Additionally, one of the major causes of failure in the bond is fatigue. With increasing knowledge in the field of intelligent material systems, it is now possible to reduce the stress in the adhesive bond by using induced strain actuators, such as PZT. Experimental results show that the fatigue life of a vibrating, cantilever beam with an adhesive bond can be increased by nearly an order of magnitude with active fatigue control. This paper presents an analytical model which can be used to determine the correct control schemes of induced strain actuators on a cantilever beam vibrating over a range of frequencies. With proper control, the peeling stresses in the adhesive bond can be minimized for a broad frequency range.

Paper Details

Date Published: 8 September 1993
PDF: 10 pages
Proc. SPIE 1917, Smart Structures and Materials 1993: Smart Structures and Intelligent Systems, (8 September 1993); doi: 10.1117/12.152758
Show Author Affiliations
Craig T. Dempsey, Virginia Polytechnic Institute and State Univ. (United States)
Shi Li, Virginia Polytechnic Institute and State Univ. (United States)
Chen Liang, Virginia Polytechnic Institute and State Univ. (United States)
Craig A. Rogers, Virginia Polytechnic Institute and State Univ. (United States)


Published in SPIE Proceedings Vol. 1917:
Smart Structures and Materials 1993: Smart Structures and Intelligent Systems
Nesbitt W. Hagood; Gareth J. Knowles, Editor(s)

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