Ultrasonic nondestructive evaluation of cracked composite laminates

A. K. Mal*, Ching-Chung Yin, Y. Bar-Cohen


研究成果: Article同行評審

30 引文 斯高帕斯(Scopus)


Guided wave behavior in undamaged as well as damaged fiber-reinforced composite laminates is studied in an effort to develop ultrasonic nondestructive methods for their quantitative characterization. A global matrix method is used to formulate the wave propagation problem and to calculate the reflection coefficients and dispersion curves for unidirectional and angle-ply laminates immersed in water. The depth of an interface delamination in a unidirectional plate is determined through the analysis of the reflected waves. A systematic inversion scheme of dispersion data is applied to determine the reduction in stiffness due to transverse cracks in the off-axis plies of damaged, multi-orientation laminates. Excellent agreement between the theoretical results and measured data is achieved in most cases, indicating that the model is accurate within the framework of linear theory.

頁(從 - 到)85-101
期刊Composites Engineering
出版狀態Published - 1 1月 1991


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