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주행 및 설계 조건에 따른 런플랫 타이어의 파괴 특성 연구
조기연(Ki Youn Cho),김기현(Gi Hyun Kim),조춘택(Choon Tack Cho) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
A run flat tire(RFT) is designed and developed to lead the vehicle is continually driven for certain periods of speed and time without inflated air. Recently various technologies of self supporting type of a run flat tire are actively researched and accomplished as increasing the consumer demand. Especially it is important to the performance of sidewall area including insert rubber and body ply depend on driving speed and load at the puncture mode. So, Influence evaluation is executed and analyzed during the different speed and load using the indoor high speed test machine and the thermal infrared camera(FLIR, SC640). And characteristic of each mode is analyzed on harsh condition until failure. Also, Durability variation of run flat tires is analyzed by different design of carcass cords.
천연고무 / 부타디엔고무 ( NR/BR ) 혼합고무와 황동피복코드의 접착성질
전경수(Gyung Soo Jeon),손봉영(Bong Young Sohn),정승원(Seung Won Jeong),조평래(Pyung Lae Cho),조춘택(Choon Tack Cho),서곤(Gon Seo) 한국화학공학회 1997 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.35 No.1
Physical properties and adhesion characteristics of blended rubber compounds composed of natural rubber(NR) and butadiene rubber(BR) were investigated. With increasing BR content, crosslinking density was increased due tn the inhibition of reversion. As a result, Young`s modulus was increased, while tensile strength and elongation measured at break point was decreased due to the decrease of tear energy. High values of rubber coverage of these adhesion test samples showed that the strength of adhesion interface was relatively higher than that of rubber layer. Pullout forces decreased with increase in the BR content. A good relationship between pullout force and tensile strength of the blend is observed, indicating that pullout force is mainly dependent on the fatigue properties of the blend. Interaction between NR and BR in the blended rubber compounds for the adhesion with brass-plated steel cord was not observed.
타이어 특성인자에 따른 차량 전복 동특성 해석에 관한 연구
권성진(Seong-Jin Kwon),김찬중(Chan-Jung Kim),배철용(Chul-Yong Bae),이봉현(Bong-Hyun Lee),구태윤(Tae-Yun Koo),조춘택(Choon-Tack Cho) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
Single vehicle accidents sometimes lead to vehicle rollover. Rollover is defined as a vehicle rotation of 90 degree or more around its longitudinal axis. In this paper, the multi-body vehicle dynamic model has been constructed to investigate vehicle rollover propensity. The vehicle dynamic model consisted of body, suspension, steering, power-train, brake, tire, road, and driver subsystems. The whole vehicle parameters, each vehicle's part parameter, part connecting elements such as spring, damper and bush, and tire characteristic factors were measured by an experiment to accomplish accurate rollover analysis. With the developed vehicle dynamic model, rollover characteristic analysis due to tire characteristic factors, such as cornering stiffness and cornering force peak has been carried out.