This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Pulsed Eddy Current Inspections of Aircraft Structures in Support of Holistic Damage Tolerance
Technical Paper
2003-01-2916
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Riveted fuselage splice joints are a common feature in the construction of transport aircraft. Traditional durability and damage tolerance analyses of these joints have often ignored or greatly simplified the effect of corrosion damage and its interaction with fatigue. This has required that corrosion damage be repaired as soon as it is detected, which has in turn discouraged the use of sensitive nondestructive inspection (NDI) techniques which may find structurally insignificant amounts of damage. New holistic life assessment models which do account for corrosion damage are under development by many research groups including the National Research Council Canada. These models require quantitative assessment of corrosion damage as well as fatigue damage.
Pulsed eddy current (PEC) inspection methods have been developed to address these needs, and this paper presents the results of a signal processing technique developed to characterize material loss in a two-layer structure from PEC data. The goal of the technique is to map the thickness of both the 1st and 2nd layers. Applying this method to PEC data measured on a laboratory test specimen shows that corrosion can be quantified with an error of less than 4% of a layer thickness.
The effect of NDI error in corrosion quantification on maintenance and repair is estimated using a holistic, probabilistic life assessment model. The paper will discuss how these models, along with verified NDI techniques, can be used to implement new proactive maintenance paradigms for aircraft structural components.
Recommended Content
| Journal Article | The Evolution of the Composite Fuselage - A Manufacturing Perspective |
| Technical Paper | New Technologies for Airframe Structural Assemblies |
| Technical Paper | Advances in Aircraft Component Superplastic Forming/Diffusion Bonding Technology |
Authors
- M. S. Safizadeh - Structures, Materials & Propulsion Laboratory Institute for Aerospace Research, National Research Council Canada
- D. S. Forsyth - Structures, Materials & Propulsion Laboratory Institute for Aerospace Research, National Research Council Canada
- Z. Liu - Structures, Materials & Propulsion Laboratory Institute for Aerospace Research, National Research Council Canada
- B. A. Lepine - Structures, Materials & Propulsion Laboratory Institute for Aerospace Research, National Research Council Canada
- M. Liao - Structures, Materials & Propulsion Laboratory Institute for Aerospace Research, National Research Council Canada
Citation
Safizadeh, M., Forsyth, D., Liu, Z., Lepine, B. et al., "Pulsed Eddy Current Inspections of Aircraft Structures in Support of Holistic Damage Tolerance," SAE Technical Paper 2003-01-2916, 2003, https://doi.org/10.4271/2003-01-2916.Also In
References
- Liao M. Forsyth D. Komorowski J.P. Bellinger N. “Risk Analysis for Corrosion Maintenance Actions on Aircraft Structures” proceedings of the 28 th Conference of the International Committee on Aeronautical Fatigue Lucerne Switzerland 05 - 09 May 2003
- Lepine B. A. Wallace B. P. Forsyth D. S. Wyglinski A. “Pulsed eddy current method developments for hidden corrosion detection in aircraft lap splices” Proceedings of the 1st Pan-American Conference for Nondestructive Testing Sept 1998
- Bieber J. A. Tai C. Moulder J. C. “Quantitative assessment of corrosion in aircraft structures using scanning pulsed eddy current” Review of Progress in Quantitative Nondestructive Evaluation 17 1998 315 322
- McIntire P. “Nondestructive Testing Handbook” ASNT 4 1986