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강준모(Junmo Kang),원성진(SungJin Won),박준우(JunWoo Park),이호성(HoSung Lee) 한국자동차공학회 2024 한국자동차공학회 학술대회 및 전시회 Vol.2024 No.11
Recently, the importance of reinforcing the durability of automobile parts to withstand high load inputs has increased. The insulator, located on the top of the strut or shock absorber of the front and rear suspension and attached to the body, transmits loads from the wheel and road surface, insulates vibration and shock, and contributes to ride comfort and handling performance. However, the existing insulator’s inner rubber experienced excessive deformation during durability testing, leading to weakened durability and creep performance. To address this issue, increasing the rubber’s hardness was attempted, but this resulted in inferior NVH (Noise, Vibration, and Harshness) and R&H (Ride and Handling) performance. In this study, the insulator’s structure was redesigned by eliminating the existing inner/outer rubber structure and applying a stopper structure to the upper and lower parts. This design aimed to implement secondary characteristics under large load inputs, according to actual vehicle requirements. The redesigned insulator demonstrated improved durability and characteristics, optimized weight reduction.
유전영동을 기반으로 하는 탄소 나노구조의 선택적인 분리
강준모(Junmo Kang),홍승현(Seunghyun Hong),최재붕(Jae-Boong Choi),김영진(Young-Jin Kim),백승현(Seunghyun Baik) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
Dielectrophoretic behavior of semiconducting single-walled carbon nanotubes(SWNT) was investigated theoretically and experimentally. The surface conductance of nanotubes was modulated using anionic and cationic surfactant mixtures. The experimental results indicate that dielectrophoretic behavior of SWNT highly depends on the procedure of mixing two opposite-charged surfactants. Clausius-Mossotti factor was calculated by measuring zeta potentials and solution conductivity. Raman spectroscopy was used to characterize the dielectrophoretically deposited nanotubes arrary. We found that metallic nanotubes were selectively separated from the nanotubes suspension, resulting from modulation of surface conductance of semiconducting SWNT.