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Proceedings Paper

Durability patch: application of passive damping to high-cycle fatigue cracking on aircraft
Author(s): Lynn C. Rogers; Ian R. Searle; Roy Ikegami; Robert W. Gordon; Dave Conley
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Paper Abstract

Although high-cycle fatigue cracks in secondary structure are often termed 'nuisance cracks,' they are costly to repair. Often the repairs do not last long because the repaired part still responds in a resonant fashion to the environment. Although the use of visco-elastic materials for passive dampening applications is well understood, there have been few applications to high-cycle fatigue problems because the design information: temperature, resonant response frequency, and strain levels are difficult to determine. The damage dosimeter, and the durability patch are an effort to resolve these problems with the application of compact, off-the-shelf electronics, and a damped bonded repair patch. This paper presents the electronics, and patch design concepts as well as damping performance test data from a laboratory patch demonstration experiment.

Paper Details

Date Published: 9 May 1997
PDF: 10 pages
Proc. SPIE 3045, Smart Structures and Materials 1997: Passive Damping and Isolation, (9 May 1997); doi: 10.1117/12.274203
Show Author Affiliations
Lynn C. Rogers, CSA Engineering, Inc. (United States)
Ian R. Searle, Boeing Defense & Space Group (United States)
Roy Ikegami, Boeing Defense & Space Group (United States)
Robert W. Gordon, Air Force Wright Lab. (United States)
Dave Conley, Air Force Wright Lab. (United States)

Published in SPIE Proceedings Vol. 3045:
Smart Structures and Materials 1997: Passive Damping and Isolation
L. Porter Davis, Editor(s)

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