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배성열,임진남 한국화학공학회 1979 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.17 No.3
1,2-dichloroethane-n-heptane, 1,2-dichloroethane-n-butanol系와 n-heptane-n-butanol系의 混合熱을 15℃, 25℃, 35℃와 45℃에서 測定하였으며 이로부터 partial heats of mixing값들을 구한 후 같은 溫度에서 過剩熱力學的 性質을 計算하였고 partial excess Gibbs free energy를 利用하여 等溫氣液平衡値를 推算하였으며, 이 값을 混合熱로부터 計算된 過剩 Gibbs free energy와 함께 total pressure法으로 計算된 35℃와 45℃에서의 값들과 比較하여 보았고 더욱 150㎜Hg와 300㎜Hg에서 等壓氣液干衡値를 推算하였다. Heats of mixing for the l,2-dichloroethane-n-heptane, 1,2-dichloroethane-n-butanol and n-heptane-n-butanol systems were measured at 15℃, 25℃, 35℃ and 45℃. From the heats of mixing, partial heats of mixing were calculated, and then excess thermodynamic properties for each binary solutions were calculated. Using the partial excess Gibbs free energy, the values of isothermal vapor·liquid equilibrium were estimated. The calculated excess Gibbs free energy and isothermal vapor·liquid equilibrium data from heats of mixing were compared with those by total pressure method at 35 C and 45 C. Furthermore. the isobaric vapor-liquid equilibrium data were estimated at 150㎜Hg and 300㎜Hg.
자동차 부품용 알루미늄 접합 제진 패널의 기계적 특성 및 진동 특성 평가
배성열,배기만,김윤해 한국복합재료학회 2019 Composites research Vol.32 No.2
The objective of this research is to study the mechanical and vibration characteristics of vibration damping aluminum panels for automotive parts. For this purpose, the test and simulation results of aluminum-resin hybrid materials and aluminum sheet materials were compared. Tensile strength and elastic modulus of the hybrid material were approximately 10% lower than aluminum sheet. Also, it was showed that the hybrid material have lower natural frequency than aluminum sheet, and it was confirmed that loss factor increases as the thickness of resin increases. Finally, it is confirmed that the test results and the analysis results are similar with each other and the performance prediction of the materials are possible by FEA. 본 연구의 목적은 자동차용 부품에 적용하기 위한 알루미늄 접합 제진 패널에 대한 기계적 특성 및 진동 특성을 도출하기 위한 것이며, 이를 위해서 알루미늄 하이브리드 소재와 알루미늄 원소재의 시험 및 시뮬레이션 결과가 상호 비교 되었다. 알루미늄 제진 패널 및 알루미늄 원소재의 인장강도 평가를 통해서 알루미늄 하이브리드 소재의 인장강도 및 인장탄성계수가 알루미늄 원소재 대비 약 10% 내외로 낮음을 확인할 수 있었다. 소재 단위의 해석 및 시험을 통해서 하이브리드 소재가 원소재 대비 낮은 고유진동수를 나타냄을 확인하였고, 하이브리드 소재를 구성하는 수지의 두께가 높아질수록 손실계수가 상승됨을 확인하였다. 또한, 기계적 특성 평가 모사 시뮬레이션을 통해 시험결과와 시뮬레이션 결과가 잘 일치하며, 유한요소해석을 통한 소재의 성능예측이 가능함을 확인할 수 있었다.
배성열,이승환 忠州大學校 2011 한국교통대학교 논문집 Vol.46 No.-
Due to advances of low power ULSI design, wireless sensor nodes open up the possibility of powering small wireless computing and communication devices from the scavenged ambient energy. In this paper, the revised theoretical equations have been suggested from the coupled analysis of serially connected bimourph cantilevers in order to estimate the generated voltages of piezoelectric cantilevers according to the external vibration and the generated voltages from cantilever have been compared to the experimental results. The generated voltages at 0.5 G have been increased from 4.32 V (DUT-1) to 22.4 V (DUT-2) at each resonant frequency with increments of piezoelectric layer thickness. The analytical output voltages of piezoelectric cantilevers are good matched to the experimentally acquired output voltage characteristics of each devices under tested.
배성열,정백영,김일겸,박상록,임장순 대한설비공학회 1998 설비공학 논문집 Vol.10 No.3
This paper contains a verification of simulation program to predict the capacity of a condenser used in car air-conditioners. Verification of simulation program is carried out with the comparison error between experiment and simulation bounds within 3.5%. The present investigation shows the results for heat transfer rates of condenser under different operating conditions, such as velocity and degree of superheat. The range of front velocity of air is 1∼5m/s. As the front velocity is increased, the heat transfer rate of condenser is largely increased at a low velocity range. In a meanwhile, heat transfer rate of condenser is almost constant in a range of velocity over 3m/s. As for the effect of inlet pressure of refrigerant on the heat transfer rate, we obtained the similar trend of heat transfer rates as like varying the front velocity, Also we have calculated the heat transfer rates with varying inlet superheats of refrigerant, the larger the superheat is, the more heat transfer rate is obtained.
Polyamide 6 입자 및 CTBN 첨가 기술에 따른 에폭시/탄소섬유 복합재의 강인화 효과 및 기계적 특성
배성열,이교문,석지훈,최재완,손우혁,김윤해,Sung-Youl Bae,Kyo-Moon Lee,Sanjay Kumar,Ji-Hun Seok,Jae-Wan Choi,Woo-Hyuk Son,Yun-Hae Kim 한국복합재료학회 2023 Composites research Vol.36 No.5
Epoxy-based carbon fibers reinforced plastic (CFRP) exhibit limitations in their suitability for industrial applications due to high brittleness characteristics. To address this challenge, extensive investigations are underway to enhance their toughness properties. This research focuses on evaluating the toughening mechanisms achieved by Polyamide 6 particles(p-PA6) and Carboxyl-Terminated Butadiene-Acrylonitrile (CTBN) elastomer, with a specific emphasis on utilizing minimal additive quantities. The study explores the impact of varying concentrations of p-PA6 and CTBN additives, namely 0.5, 1, 2.5, and 5 phr, through comprehensive Mode I fracture toughness and tensile strength analyses. The inclusion of p-PA6 demonstrated improvements in toughness when introduced at a relatively low content of 1phr. This improvement manifested as a sustained fracture behavior, contributing to enhanced toughness, while simultaneously maintaining the material's tensile strength. Furthermore, the investigation revealed that the incorporation of p-PA6 affected in particle aggregation, thus influencing the overall toughening mechanism. Incorporation of CTBN, an elastomeric modifier, exhibited a pronounced increase in fracture toughness at higher concentrations of 2.5 phr and beyond. However, this increase in toughness was accompanied by a reduction in tensile strength, resulting in fracture behavior similar to conventional CFRP exhibiting brittleness. The synergy between pPA6, CTBN and CFRP appeared to marginally enhance tensile strength under specific content conditions. As a result of this study, optimized conditions for the application of the p-PA6, CTBN toughening technology have been identified and established.