http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
CAE 해석을 이용한 FRP시험편의 사출금형설계에 대한 최적화 연구
김종우(Jong Woo Kim),정도연(Do Yeon Jung),김진호(Jin Ho Kim),김철인(Chul In Kim),최태종(Tae Jong Choi),김연직(Yon Jig Kim),임재규(Jae Kyoo Lim) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
In this paper, CAE analysis and manufacturing of plastic injection molding using fiber reinforced plastics(FRP) were performed for tensile test specimen. ASTM for plastic tensile specimen was applied to design and prevent an injection mold from external impact damage. Injection molding experiments with variations of injection speed, temperature, pressure and weld line were performed and then carbon fiber reinforced polycarbonate specimens was also performed. as a result, how to optimize mold design and connect systematically all of processes from mold design to manufacturing through the efficient use of CAE analysis in development process.
축 방향 하중하에서 UV 열화된 폴리카보네이트의 파괴 특성에 관한 연구
정도연(Jung Do Yeon),김진호(Kim Jin Ho),김연직(Kim Yon Jig),이길성(Lee Kil Sung),임재규(Lim Jae Kyoo) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
Degradation is an important failure mechanism when evaluating engineering materials which are soft material as polymers or mechanical elements at high temperatures, One of the popular thermo-elastic polymers, Polycarbonate(PC) which is used broadly for engineering polymer which has excellent mechanical and thermal properties compared to other polymers, was studied for degradation characteristic at various level of axial road (0, 1, 3KN) depending on a UV(0, 20,100, 300h) and temperatures. In the experimental results of this study, tensile stress and strain of PC decreased exponentially as the temperatures increased, recovery of tensile strength.
해수환경하에서 나노복합재료(Epoxy/MWCNTs)로 coating한 마그네슘합금(AM50)에 대한 부식평가
조일민(Il Min Jo),정도연(Do Yeon Jung),김철인(Chul In Kim),심충무(Choong Moo Shim),김연직(Yon Jig Kim),임재규(Jae Kyoo Lim) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
Mg and its alloys have attracted a lot of attention in many different sectors of engineering application such as automotive, aircraft, electronics, handled or household industry field. These are due to lightweight and superior specific strength of magnesium alloy. However, the low corrosion resistance of Mg alloys make it difficult to apply in many engineering application. The present investigation evaluates nanocomposite layers which were prepared by adding a multi walled carbon nanotubes (MWCNTs) to an epoxy resin aiming to study the resulting corrosion mechanism and corrosion performance of Mg alloy AM50. The pure polymer layer was investigated and compared between the nanocomposites containing CNTs. Distribution behavior of carbon nanotubes in the epoxy matrix was examined through forced scanning electron microscopy (FE-SEM). The results demonstrated that, the CNTs demonstrated a good dispersion inside the polymer matrix. Both nanocomposite and pure coated samples showed subsequently good adhesive properties to resist aggressive corrosion under seawater environment for a long period.
Air Jet Spinning법을 이용한 PCL/PEO 복합나노섬유 제조 기술
국은지(Eun Ji Kuk),황명구(Myung Goo Hwang),김명근(Myung Geun Kim),김상범(Sang Bum Kim),김연직(Yeon Jig Kim),임재규(Jae Kyoo Lim) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
This study woven PCL by different concentrations using Air Jet Spinning Method(AJS), observed the surface and manufactured nano-fiber under the optimal condition. PCL is cheap with superior processability and lots of studies on it have been conducted as a biodegradable material without any toxicity. In comparison with other biodegradable high molecule, the speed of degradation is slow. So, there are weaknesses that its mainly used for the system of organ drug transfer or has low mechanical characteristics. To improve mechanical characteristics of PCL nano-fiber manufactured by Air Jet Spinning method, nano-fiber was manufactured by blending PEO. PCL/PEO blending nano-fiber showed increased tensile strength and hydrophilicity respectively.