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조치룡 國立 昌原大學校 産業技術硏究所 1993 産技硏論文集 Vol.7 No.-
Linear short fibers are added between laminae in a composite laminate to improve the interlaminar fracture toughness. The interlaminar fracture resistance is determined in terms of fracture energy utilizing the generalized locus method which can evaluate the fracture energy even in highly non-linear materials. The fracture energy of the short fiber reinforced specimens is increased about 20%. From the fracture surface study, it is show that the short fibers added at the interface disturb the progress of the fiber branching between the laminae during the fracture. This interruption behavior of the short fiber is thought to be the main cause of the improvement of the fracture energy.
KTX-1 복합재 브레이크 페달 개발 및 구조 인증시험
조치룡,김현수,김광수,Joe, Chee-Ryong,Kim, Hyun-Su,Kim, Kwang-Su 대한기계학회 1999 大韓機械學會論文集A Vol.23 No.7
A brake pedal for the flight control system of the Korean primary trainer is developed using composite material. The development includes the structural design, stress analysis, manufacturing and the qualification tests. A FEM analysis is used for the structural design and stress analysis. Autoclaving process is used to fabricate the composite brake pedal. For the qualification tests, modular fixtures are developed and applied. It is shown that the composite brake pedal developed meets all the structural integrity requirements specified in the military specification for aircraft parts.