The numerical simulation of laser-generated ultrasound to detect the debonding in the honeycomb sandwich board

Ling Yuan; Yi-ping Cui; Zhujun Gu; Zhong-hua Shen; Xiao-wu Ni

doi:10.1117/12.901027

22 August 2011 The numerical simulation of laser-generated ultrasound to detect the debonding in the honeycomb sandwich board

Ling Yuan, Yi-ping Cui, Zhujun Gu, Zhong-hua Shen, Xiao-wu Ni

Author Affiliations +

Proceedings Volume 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging; 81923V (2011) https://doi.org/10.1117/12.901027
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

Abstract

Among complex materials, honeycomb sandwich structure has a lot of advantages. However, it is usually found poor bonding or even debonding. Some convenient nondestructive methods should be found to measure the defect efficiently. Laser-generated ultrasound detection is a new nondestructive method with a bright future. Compared with traditional methods, the advantages of non-contact and high resolution in spatial and temporal made it applicable not only in measuring defects with high precision, but also in the characterization of various complex shapes. In this paper, to detect the debonding of the honeycomb sandwich board, the laser-generated ultrasound technology was used. By the use of the finite element method (FEM), a 2D model dealing with laser-generated ultrasound in the honeycomb sandwich board was presented. Take into account of the debonding problem, by adopting the scanned laser source, the propagation of Lamb wave and longitudinal wave were studied. The debonding in the honeycomb sandwich board was assessed though the characteristic of the Lamb wave and longitudinal wave in time domain and frequency domain.

Citation Download Citation

Ling Yuan, Yi-ping Cui, Zhujun Gu, Zhong-hua Shen, and Xiao-wu Ni "The numerical simulation of laser-generated ultrasound to detect the debonding in the honeycomb sandwich board", Proc. SPIE 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, 81923V (22 August 2011); https://doi.org/10.1117/12.901027

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