Evaluation of small defects in carbon-fiber-reinforced composites using ultrasonic pulse echo amplitude

Brian Stephen Wong; Tan Kha Sheng; Guo Ningqun; Tui Chen Guan

doi:10.1117/12.269811

20 March 1997 Evaluation of small defects in carbon-fiber-reinforced composites using ultrasonic pulse echo amplitude

Brian Stephen Wong, Tan Kha Sheng, Guo Ningqun, Tui Chen Guan

Proceedings Volume 2921, International Conference on Experimental Mechanics: Advances and Applications; (1997) https://doi.org/10.1117/12.269811
Event: International Conference on Experimental Mechanics: Advances and Applications, 1996, Singapore, Singapore

Abstract

Two methods -- the empirical constants and decibel drop -- for sizing defects, which are very close to the probe, in fiber reinforced composites using the pulse echo ultrasonic inspection method were developed and experimental data obtained. The methods relate the reduction in signal amplitude from a defect which is smaller than the probe diameter to the signal from a defect which is equal to or larger than the probe diameter. The empirical constants method was confirmed to produce a higher accuracy than the decibel drop method.

Citation Download Citation

Brian Stephen Wong, Tan Kha Sheng, Guo Ningqun, and Tui Chen Guan "Evaluation of small defects in carbon-fiber-reinforced composites using ultrasonic pulse echo amplitude", Proc. SPIE 2921, International Conference on Experimental Mechanics: Advances and Applications, (20 March 1997); https://doi.org/10.1117/12.269811

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