Title :
Detection of delamination in graphite/epoxy composite by electric potential method
Author :
Chu, Young-Woo ; Yum, Young-Jin
Author_Institution :
Sch. of Mech. & Automotive Eng., Ulsan Univ., South Korea
fDate :
26 Jun-3 Jul 2001
Abstract :
The amount of delamination in a graphite/epoxy composite laminate was measured using the resistance change of a plate. Initially cracked DCB (double cantilever beam) composite specimens were fabricated and mode I interlaminar fracture test was performed. Resistance change increased as the crack propagated and the change was larger for the thinner specimen. The relation of resistance change and crack growth rate showed nonlinear behavior and could be simplified as a parabolic equation. A proposed empirical equation which included thickness effect of composite plate is utilized to detect and measure inner flaws such as delamination of a fiber reinforced composite laminate
Keywords :
carbon fibre reinforced composites; cracks; delamination; electric potential; electric resistance; fracture toughness testing; laminates; parabolic equations; C; composite plate thickness effect; crack growth rate; crack propagation; cracked DCB composite specimens; cracked double cantilever beam composite specimens; delamination; delamination detection; electric potential method; fiber reinforced composite laminate; graphite/epoxy composite; graphite/epoxy composite laminate; inner flaws; mode I interlaminar fracture tests; nonlinear behavior; parabolic equation; resistance change; specimen thickness; Composite materials; Degradation; Delamination; Electric potential; Electric resistance; Electrical resistance measurement; Laminates; Nonlinear equations; Optical fiber sensors; Testing;
Conference_Titel :
Science and Technology, 2001. KORUS '01. Proceedings. The Fifth Russian-Korean International Symposium on
Conference_Location :
Tomsk
Print_ISBN :
0-7803-7008-2
DOI :
10.1109/KORUS.2001.975013
