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Assessment of Multiple Delamination in Laminated Composites for Aircrafts using X-ray Backscattering  

Kim, Noh-Yu (Department of Mechanical Engineering, Korea University of Technology and Education)
Publication Information
Journal of the Korean Society for Nondestructive Testing / v.30, no.1, 2010 , pp. 46-53 More about this Journal
Abstract
A Compton X-ray backscatter technique has been developed to quantitatively assess impact damage in quasi-isotropic laminated composites made by a drop-weight tester. X-ray backscatter imaging system with a slit-type camera is constructed to obtain a cross-sectional profile of impact-damaged laminated composites from the electron-density variation of the cross section. A nonlinear scattering model based on Boltsman equation is introduced to compute Compton X-ray backscattering field for the defect assessment. An adaptive filter is also used to reduce noises from many sources including quantum noise and irregular distributions of fibers and matrix in composites. Delaminations masked or distorted by the first delamination are detected and characterized effectively by the Compton X-ray backscatter technique, both in width and location, by application of error minimization algorithm.
Keywords
Impact Damage; Multiple Delamination; X-ray Scattering; Aircraft; Composite Material; Compton Scattering;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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