http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
텔리메트리(Telemetry)를 이용한 승용차용 드라이브축의 서비스토오크(Service Torque)측정 및 피로수명 예측
이상록(S.R.Lee),김완두(W.D.Kim),이학주(H.J.Lee),한승우(S.W.Han),김경식(K.S.Kim) 한국자동차공학회 1994 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The real service torque has been measured by use of the wireless telemetry system for the 4-wheel drive passenger car under the various road and operating condition. Also the fatigue tests has been performed for the drive shaft. and corresponding fatigue life has been predicted.<br/> It has been observed that the measured service torque and the predicted fatigue life could be varied significantly according to the road and driving condition.<br/>
한승우(S. W. Han),하산(Hasan),김동호(D. H. Kim),이현우(H. W. Lee),조기호(K. H. Cho),김정엽(J. Y. Kim),이학주(H. J. Lee) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
While the thermoelectric properties as well as the thermal, electric and mechanical properties of bulk Bi-Te and Sb-Te compounds are well known, properties of the thin films of these alloys are still not well defined. This study deals with the characterization of mechanical and electrical properties of Bi₂Te₃ thin films prepared by RF magnetron sputtering. Electrical transport and mechanical properties were measured by a hall effect measurement system and nanoindenter respectively. The thin film properties obtained from this study will be used in the ongoing research for design and development of micro thermoelectric coolers.
유한요소해석을 이용한 연성재료의 나노인덴테이션에 관한 연구
한승우(S. W. Han),이현우(H. W. Lee),이학주(H. J. Lee),고순규(S. G. Ko),김재현(J. H. Kim) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.4
Nano-indentation is used for measuring mechanical properties of thin films such as elastic modulus and hardness. For ductile materials, pile-up around the indenter causes the calculation of inaccurate projected contact area. This phenomenon was found by measurement of indentation shape using an atomic force microscope. In present study finite element analysis of nano-indentation was performed to compensate the effects of pile-up on the contact area. The result of finite element analysis was compared with that of nano-indentation for a ductile material. The analysis has demonstrated that the true contact area is greater than that calculated by nano-indentation. It is verified that the consideration of the effects of pile-up in nanoindentation for ductile materials using the finite element method is reasonable.
이승우(S. W. Lee),한승우(S. W. Han),김정실(J. S. Kim),송준엽(J. Y. Song),김완두(W. D. Kim) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
The reliability evaluation and analysis for general electronic components are required to guarantee in quality and in efficiency. Reliability prediction of the interface card, which is used in the CNC controller of machine tools, was carried out using MIL-HDBK-217F and PRISM database. Reliability performances such as MTBF(Mean Time Between Failure), failure rate and reliability were obtained, and the variation of failure rate for electronic components according to temperature change was predicted. The results obtained from this study are useful information to consider a counter plan for the weak components before they are used.