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Proceedings Paper

Theoretic analysis and numerical simulation on quantitative evaluation of interface strength by pulsed-laser technology
Author(s): Ming Zhou; Xiaomin Wang; Chuanyu Gao; Yongkang Zhang; Lan Cai
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Paper Abstract

With the aim of quantitative measuring the dynamic adhesive strength of Al2O3film/Fe, we use a modified laser spallation setup, and let high-power laser pulse shock the energy absorbing thin coating, then cause a pressure pulse propagating to matrix. At the free surface, a laser probe is used to record the epicentral surface displacement history caused by elastic wave which propagating to the free surface. Though the analysis of elastic wave, data processing and a computer simulation, we propose a novel model of the attenuation and the dispersion of the elastic wave. After characterizing, we obtain a new spallation criteria corresponding to progressive damages at the film- matrix interface, i.e. interface delamination, film spallation and film expulsion, respectively. At the same time, according to the arrival time and attenuation pattern of the elastic wave, we also propose a new computer algorithm for estimating the source fracture dimension.

Paper Details

Date Published: 8 September 1999
PDF: 5 pages
Proc. SPIE 3862, 1999 International Conference on Industrial Lasers, (8 September 1999); doi: 10.1117/12.361105
Show Author Affiliations
Ming Zhou, Jiangsu Univ. of Science and Technology (China)
Xiaomin Wang, Jiangsu Univ. of Science and Technology (Japan)
Chuanyu Gao, Jiangsu Univ. of Science and Technology (China)
Yongkang Zhang, Jiangsu Univ. of Science and Technology (China)
Lan Cai, Jiangsu Univ. of Science and Technology (China)

Published in SPIE Proceedings Vol. 3862:
1999 International Conference on Industrial Lasers
Fuxi Gan; Horst Weber; Zaiguang Li; Qingming Chen, Editor(s)

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