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CNT 직경에 따른 CNT-Polyamide 복합체의 특성 변화
박영수(Y.S. Park),송준혁(S.J. Song),김경재(K.J. Kim),허몽영(H.M. Huh),유명한(M.H. Yoo),문민석(M.S. Moon),오제하(J.H. Oh),정우성(W.S. Jeong),강신재(S.J. Kang),양성모(S.M. Yang) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
The effect of CNT diameters on properties of CNT-polyamide composites were investigated such as electrical conductivity, tensile strength and thermal conductivity. To get different diameter distributions of CNTs, several portions of Mo and Fe in Mo-Fe/MgO catalysts were synthesized by a combustion method at 600℃. And all CNTs growed at 900℃ with 3 SLM methane and 1 SLM hydrogen for 40min. Four kinds of CNTs with different diameter distributions, such as 1~3㎚, 3~7㎚, 7~13㎚, and 10~30㎚, were selected to make CNT-polyamide composites. Each composite was manufactured by a solution mixing using bar-type ultra-sonicator in the CNT portions from 1phr to 50 phr. And electrical conductivity, tensile strength, and thermal conductivity were measured. Three properties of CNT-polyamide composite, manufactured with 10㎚ diameter, were more excellent compared to other composites, with electrical conductivity 10°Ω at 7phr, thermal conductivity 2.4.W/mK at 40phr, tensile strength 60㎫ at 30phr. CNTs with diameter 10㎚ were superior to other diameters for the multi-functional composite such as CNT-polyamide Composites.
[論文] 견인력시험을 통한 차륜차량의 구동효율에 관한 연구
양성모(S.M.Yang),강윤수(Y.S.Kang) 한국자동차공학회 1987 오토저널 Vol.9 No.2
The drive efficiency is investigated with drawbar pull test to provede the basic data in the gradability and acceleration of the wheeled vehicle.<br/> As a result, the drive efficiencies are determined from<br/> 4 x 2 drive: Direct gear 0.89<br/> 1st gear 0.81<br/> Other gears 0.83_0.87<br/> 4x4 high drive: Direct gear 0.85<br/> 1st gear 0.77<br/> Other gears 0.79_0.83<br/> 4x4 low drive: Direct gear 0.83<br/> 1st gear 0.75<br/> Other gears 0.77-0.81
[구조강도부문] 단순인장시험에 의한 볼트결합부의 피로수명 결정
양성모(S.M.YANG),강희용(H.Y.KANG),송준혁(J.H.SONG),박정민(J.M.PARK),고원(W.GO),임채웅(C.Y.LIM) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Mechanical fastened joints are widely used for joining structural parts. In estimating the reliability of the bolted joint, the prediction of failure life is the most important failure mode to be considered. This paper presents a method for determining the fatigue life of bolted SAPH45 steel structures used extensively in truck vehicle frames. First the fastening torque on bolted joints in the structure is determined by a vibration test. Under such torque, the stress distribution factor is based on the consideration of the failure characteristics from the tensile test and the fatigue life of the bolted joint is predicted using lethargy coefficient as total defect estimation coefficient.
[論文] 독립 일반화 좌표에 의한 차륜 차량의 Hamilton 운동 방정식에 관한 연구
양성모(S.M.Yang),배대성(D.S.Bae),원용석(Y.S.Won) 한국자동차공학회 1992 오토저널 Vol.14 No.3
This task is to derive the Hamiltonian equations of motion for BMW 323i vehicle. The kinematic relationships are defined. The cut constraint equations are derived. The Hamiltonian equation of motion are developed. The constant mass matrices are identified. The cut constraint equations are stabilized. The stabilized constraint equations are used to derive the relationships between the independent and dependent coordinates. The Hamiltonian equations of motion are reduced only in terms of the independent generalized coordinates.