Durability patch: application of passive damping to high-cycle fatigue cracking on aircraft

Lynn C. Rogers; Ian R. Searle; Roy Ikegami; Robert W. Gordon; Dave Conley

doi:10.1117/12.274203

9 May 1997 Durability patch: application of passive damping to high-cycle fatigue cracking on aircraft

Lynn C. Rogers, Ian R. Searle, Roy Ikegami, Robert W. Gordon, Dave Conley

Proceedings Volume 3045, Smart Structures and Materials 1997: Passive Damping and Isolation; (1997) https://doi.org/10.1117/12.274203
Event: Smart Structures and Materials '97, 1997, San Diego, CA, United States

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.

Citation Download Citation

Lynn C. Rogers, Ian R. Searle, Roy Ikegami, Robert W. Gordon, and Dave Conley "Durability patch: application of passive damping to high-cycle fatigue cracking on aircraft", Proc. SPIE 3045, Smart Structures and Materials 1997: Passive Damping and Isolation, (9 May 1997); https://doi.org/10.1117/12.274203

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