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A Study on the characteristics of the Signals of AE according to Fracture mode of CFRP under Tensile load  

Lee, Kyung-Won (한국항공대학교 대학원 항공우주 및 기계공학과)
Lee, Sang-Yun (한국항공대학교 대학원 항공우주 및 기계공학과)
Nam, Jun-Young (한국항공대학교 대학원 항공우주 및 기계공학과)
Lee, Jong-Oh (한국기계연구원 부설 재료연구소)
Lee, Sang-Yul (한국항공대학교 항공재료공학과)
Lee, Bo-Young (한국항공대학교 항공우주 및 기계공학부)
Publication Information
Journal of the Korean Society for Aviation and Aeronautics / v.18, no.4, 2010 , pp. 51-58 More about this Journal
Abstract
Recently, aerospace structures have lightweight trend in order to reduce the cost of fuel and system, Carbon Fiber Reinforced Plastic (CFRP) can give the ability to reduce weight at 20~50% as the substitution of metal alloy, and there are advantages such as high Non-rigid, specific strength and anti-corrosion, but it is difficult to prove its destruction properties due to heterogeneous structure and anisotropy. In this study we designed specimen, inducing distinguishing destructions of material (for example, matrix crack, fiber breakage, and delamination) by using the Carbon Fiber Reinforced Plastic (CFRP) which is used in a real aircraft, to apply acoustic emission technique to aerospace structures. And we gained data via tensile testing and acoustic emission technique, from which each fault signal was classified respectively by using AE parameters and waveform.
Keywords
Acoustic Emission(AE); AE parameter; Carbon Fiber Reinforced Plastic; CFRP; Waveform Fracture mode;
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