Durability Patch: Application of Passive Damping to High Cycle Fatigue Cracking on Aircraft
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 damping 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1997
- Accession Number
- ADA468821
Entities
People
- D. Conley
- I. R. Searle
- Lynn Rogers
- R. Ikegami
- R. W. Gordon