Theoretic analysis and numerical simulation on quantitative evaluation of interface strength by pulsed-laser technology

Ming Zhou; Xiaomin Wang; Chuanyu Gao; Yongkang Zhang; Lan Cai

doi:10.1117/12.361105

8 September 1999 Theoretic analysis and numerical simulation on quantitative evaluation of interface strength by pulsed-laser technology

Ming Zhou, Xiaomin Wang, Chuanyu Gao, Yongkang Zhang, Lan Cai

Author Affiliations +

Proceedings Volume 3862, 1999 International Conference on Industrial Lasers; (1999) https://doi.org/10.1117/12.361105
Event: International Symposium on Industrial Lasers, 1999, Wuhan, China

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.

Citation Download Citation

Ming Zhou, Xiaomin Wang, Chuanyu Gao, Yongkang Zhang, and Lan Cai "Theoretic analysis and numerical simulation on quantitative evaluation of interface strength by pulsed-laser technology", Proc. SPIE 3862, 1999 International Conference on Industrial Lasers, (8 September 1999); https://doi.org/10.1117/12.361105

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