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Fracture Mechanism and Characterization of Falling Weight Impact in CF/Epoxy Composite Plates Under Law-Velocity Impact  

임광희 (우석대학교 반도체전기자동차공학부)
박노식 (조선대학교 기계공학)
김영남 (조선대학교 기계공학)
김선규 (익산대학 자동차)
심재기 (조선대학교 기계공학)
양인영 (조선대학교 기계공학부)
Publication Information
Composites Research / v.17, no.4, 2004 , pp. 53-60 More about this Journal
Abstract
This paper describes a method for a falling weight impact test to estimate the impact energy absorbing characteristics and impact strength of CFRP laminate plates based on considerations of stress wave propagation theory. The absorbed energy of T300 orthotropic composites is higher than that of quasi-isotropic specimen over impact energy 6.8J, but in case of using T700 fiber, much difference does not show. Also, absorbed energy of T300 orthotropic composites, which are composed of the same stacking number and orientation became more than that of T700 fiber specimen; however there was no big difference in case of quasi-isotropic specimens. The delamination areas of the impacted specimen were measured with the ultrasonic C-scanner to find correlation between impact energy and delamination area. The fracture surfaces were observed by using the SEM (scanning electron microscope) through a low-velocity impact test in order to confirm the fracture mechanism.
Keywords
composites; falling weight; impact damage; fracture mechanism;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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