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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 19    Special 1    September 2009

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Detection of stacking orientation error of CFRP composite laminates using ultrasound waves
Sun-Kyu KIM1, David HSU2, Young-Hwan SEO3, Kwang-Hee IM4

1. Division of Mechanical System Engineering, Chonbuk National University, Jeonju 561-756, Korea;
2. Center for Nondestructive Evaluation, Iowa State University, Ames, Iowa 50011, USA;
3. Department of Physical Education, Chosun University, Kwangju 501-759, Korea;
4. Department of Automotive Engineering, Woosuk University,
490, Hujung-ri, Samrae-up, Wanju-kun, Chonbuk, 565-701, Korea

Abstract:A jig was developed for generating a shear wave. A pyramid with an isosceles triangle with two 45o was made of aluminum to generate shear waves using two longitudinal transducers based on ultrasonic-polarized mechanism. Also, the signal splitter was connected to the pulser jack on the pulser/receiver and to the longitudinal transducers. Therefore, an experimental way was performed in order to make shear wave on the bottom of aluminum alloyed pyramid. Also, a jig was manufactured and developed for generating a shear wave based on the computer numerical simulation. It is found that the experimentally shear wave variation of newly-designed jig is consistent with computer numerical simulation results and shear wave ultrasonic application can be very useful to detect the defects in CFRP composites.

 

Key words: carbon-fiber reinforced plastics (CFRP); polarized mechanism; stacking orientation defect; composite laminates

ISSN 1672-7029
CN 43-1423/U

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