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논문 기본 정보

자료유형
학술저널
저자정보
Nohyu Kim (한국기술교육대학교) Seunyong Yang (한국기술교육대학교)
저널정보
한국비파괴검사학회 비파괴검사학회지 비파괴검사학회지 제29권 제6호
발행연도
2009.12
수록면
591 - 602 (12page)

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초록· 키워드

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The Compton backscatter technique has been applied to lap-joint in aircraft structure in order to determine mass loss due to exfoliative corrosion of the aluminum alloy sheet skin. The mass loss of each layer has been estimated from Compton backscatter A-scan including the aluminum sheet, the corrosion layer, and the sealant. A Compton backscattering imaging system has been also developed to obtain a cross-sectional profile of corroded lap-splices of aging aircraft using a specially designed slit-type camera. The camera is to focus on a small scattering volume inside the material from which the backscattered photons are collected by a collimated scintillator detector for interpretation of material characteristics. The cross section of the layered structure is scanned by moving the scattering volume through the thickness direction of the specimen. The theoretical model of the Compton scattering based on Boltzmann transport theory is presented for quantitative characterization of exfoliative corrosion through deconvolution procedure using a nonlinear least-square error minimization method. It produces practical information such as location and width of planar corrosion in layered structures of aircraft, which generally cannot be detected by conventional NDE techniques such as the ultrasonic method.

목차

Abstract
1. Introduction
2. NDT Methods for Detection of Layered Corrosion in Aging Aircraft
3. Compton Scattering of X-ray in Material
4. Narrow Beam Model for Compton Scattering Field
5. Compton Backscattering System
6. Inspection of Corroded Fuselage in Aging Aircraft
7. Deconvolution and Restoration of Compton Backscatter Data
8. Conclusions
References

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UCI(KEPA) : I410-ECN-0101-2014-500-003296288