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| WoS | SCOPUS | Document Type | Document Title | Abstract | Authors | Affiliation | ResearcherID (WoS) | AuthorsID (SCOPUS) | Author Email(s) | Journal Name | JCR Abbreviation | ISSN | eISSN | Volume | Issue | WoS Edition | WoS Category | JCR Year | IF | JCR (%) | FWCI | FWCI Update Date | WoS Citation | SCOPUS Citation | Keywords (WoS) | KeywordsPlus (WoS) | Keywords (SCOPUS) | KeywordsPlus (SCOPUS) | Language | Publication Stage | Publication Year | Publication Date | DOI | JCR Link | DOI Link | WOS Link | SCOPUS Link |
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| ○ | ○ | Article | Development of Real Operating Test Cycle for Tier-IV Construction Machineries with Emissions Characteristics | Recently, the clean air support system (CAPSS) pronounced that construction machinery is the second-largest source of pollutants in Non-road mobile machinery (NRMM) after ship. Three types of vehicles, forklifts, excavators, and loaders, account for 80 % of pollutants emitted by all construction machinery. In addition, domestic construction emission regulation has been reinforced by adopting the EU Stage V regulations. Therefore, it is necessary to analyze the domestic and overseas construction machinery regulations and perform emission test under real operation condition. In this study, three construction machineries (1 unit each of forklift, excavator, and loader) were selected as test vehicles. The emissions were measured using a portable emissions measurement system (PEMS) installed on the test vehicles. The real operation test was conducted in accordance with EU Stage V ISM policy emission measurement procedure. The real operation test cycles were developed for each vehicle type to meet the minimum test duration requirement. Additionally, the test data were evaluated to distinguish valid working events and analyze emission characteristics using the moving average window (MAW) analysis method. | Song, Jingeun; Chang, Joonbong; Moon, Seokho; Lee, Dong In; Seo, Youngkyo; Lim, Yunsung; Cha, Junepyo | Kyungpook Natl Univ, Sch Automot Engn, Sangju 37224, South Korea; Korea Automot Technol Inst, Adv Powertrain R&D Ctr, 303 Pungse Ro, Cheonan 31214, South Korea; Konkuk Univ, Sch Mech Engn, Grad Sch, Seoul 05029, South Korea; Natl Inst Environm Res, Transportat Pollut Res Ctr, 42 Hwangyeong ro, Incheon 22689, South Korea; Korea Natl Univ Transportat, Dept Automot Engn, Chungju 27469, South Korea | Song, Jingeun/MTG-2604-2025 | 56714139600; 58681305500; 58680769900; 58028623200; 58681305600; 55307517400; 36237962800 | chaj@ut.ac.kr; | INTERNATIONAL JOURNAL OF AUTOMOTIVE TECHNOLOGY | INT J AUTO TECH-KOR | 1229-9138 | 1976-3832 | 24 | 6 | SCIE | ENGINEERING, MECHANICAL;TRANSPORTATION SCIENCE & TECHNOLOGY | 2023 | 1.5 | 62.6 | 0.12 | 2025-06-25 | 1 | 1 | Non-road mobile machinery (NRMM); Construction machinery; Portable emissions measurement system (PEMS); Real operation emission test; In-service monitoring; Real operation test cycle for emission measurement | SYSTEM | Construction machinery; In-service monitoring; Non-road mobile machinery (NRMM); Portable emissions measurement system (PEMS); Real operation emission test; Real operation test cycle for emission measurement | Construction equipment; Excavation; Loaders; Roads and streets; Vehicles; Construction machinery; Emission measurement; Emission measurement systems; Emission test; In-service monitoring; Non-road mobile machineries; Non-road mobile machinery; Operation tests; Portable emission measurement system; Real operation emission test; Real operation test cycle for emission measurement; Test cycles; Excavators | English | 2023 | 2023-12 | 10.1007/s12239-023-0130-6 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Echocardiographic diagnosis of aorto-left ventricular tunnel with supravalvular pulmonic stenosis in a Shih-tzu dog | Background: The aorto-left ventricular tunnel (ALVT) is a congenital extracardiac channel that connects the ascending aorta to the left ventricle.Case Description: A 2-year-old Shih-tzu dog presented with mild exercise intolerance. Echocardiography revealed an abnormal slit-like tunnel structure connecting the ascending aorta to the left ventricle, with diastolic blood flow from the aorta to the left ventricle. Echogenic membranous stenosis was observed in the main pulmonary artery. Based on these findings, the dog was diagnosed with ALVT and type I supravalvular pulmonic stenosis.Conclusion: This is the first case report of ALVT in veterinary medicine that describes diagnostic imaging findings. ALVT should be considered in dogs with an aortic regurgitation murmur and can be detected by echocardiography. | Noh, Daji; Shin, Hyun-guk; Choi, Sooyoung; Choi, Hojung; Lee, Youngwon; Lee, Kija | Kyungpook Natl Univ, Coll Vet Med, Daegu, South Korea; 24 Africa Anim Med Ctr, Daejeon, South Korea; Kangwon Natl Univ, Coll Vet Med, Chunchon, South Korea; Chungnam Natl Univ, Coll Vet Med, Daejeon, South Korea | 57188552722; 36837576900; 55736574600; 35202930200; 8983566800; 35311016000 | leekj@knu.ac.kr; | OPEN VETERINARY JOURNAL | OPEN VET J | 2226-4485 | 2218-6050 | 13 | 2 | ESCI | VETERINARY SCIENCES | 2023 | 0.9 | 62.6 | 0 | 2025-06-25 | 0 | 0 | Aortoventricular tunnel; Congenital heart disease; Dog; Echocardiography; Pulmonic stenosis | Aortoventricular tunnel; Congenital heart disease; Dog; Echocardiography; Pulmonic stenosis | Animals; Aorta; Aortico-Ventricular Tunnel; Dog Diseases; Dogs; Echocardiography; Pulmonary Valve Stenosis; electrolyte; angiography; animal experiment; aortic stenosis; aorto-ventricular tunnel; Article; biochemistry; blood cell count; blood flow; computer assisted tomography; congenital heart disease; echocardiography; exercise; heart size; hypertrophy; mitral leaflet; mitral valve regurgitation; nonhuman; pulmonary subvalvular stenosis; Shih Tzu; thorax radiography; transthoracic echocardiography; animal; aorta; case report; diagnostic imaging; dog; dog disease; echocardiography; pulmonary valve stenosis; veterinary medicine | English | 2023 | 2023 | 10.5455/ovj.2023.v13.i2.14 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Enhanced performance of oscillating wing energy harvester using active controlled flap | The effects of a trailing-edge active controlled flap on the power output performance of an oscillating wing energy harvester were investigated by numerical analysis. The overset mesh technique was adopted, and a structured mesh was used to simulate multiple moving bodies in close proximity to a wall to improve the accuracy. Sinusoidal motion was applied to both the wings and flaps. The maximum pitch angles for the wing and flap were varied to determine the optimum operating conditions. Numerical results show that the attachment of a flap onto an oscillating wing deflects the incoming flow in flap's direction and increases the vertical momentum change, which consequently increases the pushing force and power. The wing and flap maximum pitch angles significantly affect the power output of the energy harvester. The maximum power output is obtained at maximum pitch angles of 70 degrees and 35 degrees for the wing and flap, respectively. The maximum power is enhanced by 11 % when the flap length is 20 % of the chord length, as compared with the optimum condition of an oscillating wing without a flap. | Alam, Maqusud; Sohn, C. H. | Kyungpook Natl Univ, Sch Mech Engn, Daegu 41566, South Korea | 58274982500; 36806852600 | chsohn@knu.ac.kr; | JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | J MECH SCI TECHNOL | 1738-494X | 1976-3824 | 37 | 5 | SCIE | ENGINEERING, MECHANICAL | 2023 | 1.5 | 62.6 | 0.85 | 2025-06-25 | 7 | 7 | Energy harvester; Flap; Flat plate; Flapping wing; Oscillating; Heaving; Power | EXTRACTION PERFORMANCE; AIRFOIL; FOIL | Energy harvester; Flap; Flapping wing; Flat plate; Heaving; Oscillating; Power | Energy harvesting; Oscillating flow; Thermoelectric power; Wings; Active controlled flaps; Energy Harvester; Flapping-wing; Flat plate; Heaving; Maximum pitch; Oscillating; Oscillating wing; Pitch angle; Power; Mesh generation | English | 2023 | 2023-05 | 10.1007/s12206-023-0417-6 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Experimental and numerical investigations of transfer matrix representation of simple centrifugal pendulum vibration absorber | The transfer matrix for a simple centrifugal pendulum vibration absorber (SCPVA), defined based on the vector-type four-pole method, is verified numerically and experimentally using a validation model derived from a downsized model for the drivetrain of a hydroelectric generator. First, a theoretical model and the transfer matrix for the SCPVA are briefly reviewed. Subsequently, a validation system derived from the drivetrain for a hydroelectric generator is introduced along with its dynamic characteristics obtained using the conventional, analytical method involving inertia, damping, and stiffness matrices. Next, SCPVA systems for the first- and second-order rotational vibration of the validation system are designed. In addition, the effects of the SCPVA systems are predicted using theoretical analysis and the transfer matrix method, which confirmed sufficient attenuations in the rotational vibration of the corresponding order. Next, a validation system, including a drive motor and a universal joint, is then built to intentionally generate the second-order rotational vibration. Rotational vibration responses of the system are measured using an incremental encoder and a data recorder. Finally, samples for the SCPVA are developed and then applied to the validation system. The effects of the SCPVAs are identified by comparing the vibration response of the validation system with SCPVA(s) with those of the original system. The comparison results clearly validate the transfer matrix for the SCPVA in terms of effectiveness of the SCPVA(s). | Kwak, Gyubin; Han, Youkyung; Kim, Byeongil; Cho, Hyung-Ju; Lee, Hyeongill | Kyungpook Natl Univ, Sch Automot Engn, Sangju 37224, South Korea; Seoul Natl Univ Sci & Technol, Dept Civil Engn, Seoul 01811, South Korea; Yeungnam Univ, Sch Mech Engn, Gyeongsan 38541, South Africa; Kyungpook Natl Univ, Dept Software, Sangju 37224, South Korea | 58560038900; 55457676600; 56843890300; 55177091600; 8261483800 | hilee@knu.ac.kr; | JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | J MECH SCI TECHNOL | 1738-494X | 1976-3824 | 37 | 9 | SCIE | ENGINEERING, MECHANICAL | 2023 | 1.5 | 62.6 | 0 | 2025-06-25 | 0 | 0 | Experiment; Numerical simulation; Rotational vibration; Simple centrifugal pendulum absorber; Transfer matrix | STABILITY; GEOMETRY; SET | Experiment; Numerical simulation; Rotational vibration; Simple centrifugal pendulum absorber; Transfer matrix | Centrifugation; Digital storage; Hydroelectric generators; Stiffness matrix; Transfer matrix method; Vibration analysis; Centrifugal pendulum vibration absorbers; Experimental investigations; Matrix representation; Numerical investigations; Rotational vibrations; Second orders; Simple centrifugal pendulum absorber; Simple++; Transfer matrixes; Vibration response; Pendulums | English | 2023 | 2023-09 | 10.1007/s12206-023-0811-0 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Hydrothermal performance of a stepped heat pipe | This study elucidates the hydrothermal characteristics of a capillary-driven stepped heat pipe (SHP). An axisymmetric numerical simulation is performed to analyze the effects of step pattern, area ratio (AR), evaporator length (LE), and wick parameters on the system characteristics. The results of the numerical model show good agreement with data from literature. These results suggest that superior performance can be achieved with a two-sided step and a step with sudden contraction with an enlarged evaporator. SHPs with a large area ratio (AR > 1) and a long evaporator yield superior thermal and capillary performances; those with a small condenser diameter (AR < 1) are more likely to experience dryout. Wick parameters, such as porosity (epsilon) and wick type, play a vital role in the system performance. Numerical results under the studied conditions can provide a clear engineering guide for the design of SHPs used in various engineering applications. | Son, Jong Hyeon; Shanmugam, Arun Raj; Lee, Dong-Eun; Lee, Sang Ryong; Park, Il Seouk | Kyungpook Natl Univ, Sch Mech Engn, Daegu 41566, South Korea; United Arab Emirates Univ, Dept Mech & Aerosp Engn, POB 15551, Al Ain, Abu Dhabi, U Arab Emirates; Kyungpook Natl Univ, Sch Architecture Civil Environm & Energy Engn, Daegu 41566, South Korea | 55156951300; 57209249478; 56605563300; 35766722100; 50262800000 | srlee@knu.ac.kr;einstein@knu.ac.kr; | JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | J MECH SCI TECHNOL | 1738-494X | 1976-3824 | 37 | 1 | SCIE | ENGINEERING, MECHANICAL | 2023 | 1.5 | 62.6 | 0 | 2025-06-25 | 0 | 1 | Area ratio; Capillary; Dryout; Stepped heat pipe; Wick parameters | THERMAL PERFORMANCE; SOLAR COLLECTORS; MESH WICK; SYSTEMS | Area ratio; Capillary; Dryout; Stepped heat pipe; Wick parameters | Capillary flow; Evaporators; Numerical models; Area ratios; Axisymmetric; Capillary; Dry-out; Pattern area ratio; Performance; Step patterns; Stepped heat pipe; System characteristics; Wick parameter; Heat pipes | English | 2023 | 2023-01 | 10.1007/s12206-022-1248-6 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Improving the energy density of all-solid-state batteries by maximizing the contact area between the solid electrolyte and electrode, and stress issues | Solid-state electrolyte batteries are excellent candidates for the development of safe and high-performance lithium batteries. However, the low ionic conductivity and poor interfacial contact of current solid-state electrolytes severely hinder the commercialization of solidstate batteries. Moreover, a higher stress is caused by the use of solid-state electrolytes compared with that in the case of liquid electrolytes. To increase the physical contact area between the solid/solid interfaces of all-solid-state batteries (ASSBs), this study constructed two types of interfaces with sine-curved and trapezoidal shapes to replace the general planar interface and used the Nelder-Mead algorithm to optimize the curved interface and geometric parameters of the battery cells. ASSBs are composed of a sulfide-based LI6PS5Cl solid electrolyte, a low-density lithium metal anode, and a high-theoretical-capacity LCO cathode. The optimization results show that the curved interface can achieve a higher energy density than a flat-interface battery. The stress caused by lithium deposition during battery charging was also calculated. The low modulus of the soft solid electrolyte significantly reduced the stress inside the battery. | Zheng, Rongzhen; Kim, Cheol | Kyungpook Natl Univ, Dept Mech Engn, Daegu 41566, South Korea | Zheng, Rongzhen/B-2324-2019 | 57202871353; 55508786300 | kimchul@knu.ac.kr; | JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | J MECH SCI TECHNOL | 1738-494X | 1976-3824 | 37 | 8 | SCIE | ENGINEERING, MECHANICAL | 2023 | 1.5 | 62.6 | 0.61 | 2025-06-25 | 5 | 5 | Interface optimization; Solid electrolyte; ASSBs; Li-ion battery; Stress in electrolyte | LITHIUM-ION BATTERIES; MODEL; PERFORMANCE; ANODES; METAL | ASSBs; Interface optimization; Li-ion battery; Solid electrolyte; Stress in electrolyte | Chlorine compounds; Electrodes; Interface states; Lithium compounds; Lithium-ion batteries; Phase interfaces; Potentiometric sensors; Solid state devices; Solid-State Batteries; Sulfur compounds; All-solid-state battery; Contact areas; Curved interface; Energy density; Interface optimization; Interfacial contact; Optimisations; Performance; Solid-state electrolyte; Stress in electrolyte; Solid electrolytes | English | 2023 | 2023-08 | 10.1007/s12206-023-0731-z | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Motion of Leidenfrost self-propelled droplets on ratchet in low- and high-temperature regimes | Leidenfrost droplet experiments were conducted to investigate the movement of droplets on a ratchet in low- and high-temperature regimes (L and H regimes). Slightly above the threshold temperature, the terminal velocity increased with increasing temperature until it reached the highest value. After achieving the highest value, the terminal velocity gradually decreased with temperature until there was a significant decrease in the terminal velocity. Leidenfrost regimes were identified based on not only the droplet velocity but also the droplet shape and motion. In the H regime, there was a complete thin vapor film underneath the droplets, which caused them to levitate from the ratchet. However, in the L regime, there was no a complete vapor film underneath the droplets, causing direct contact between the droplets and ratchet, resulting in drastic nucleate boiling. This resulted in a faster vapor flow and generated a stronger rotational motion than that in the H regime. A stronger rotational motion results in a faster velocity in the translational direction. | Jo, Daeseong | Kyungpook Natl Univ, Grad Sch, Dept Mech Engn, 80 Daehak Ro, Daegu 41566, South Korea; Kyungpook Natl Univ, Sch Mech Engn, 80 Daehak Ro, Daegu 41566, South Korea | 16424303000 | djo@knu.ac.kr; | JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | J MECH SCI TECHNOL | 1738-494X | 1976-3824 | 37 | 10 | SCIE | ENGINEERING, MECHANICAL | 2023 | 1.5 | 62.6 | 0.49 | 2025-06-25 | 4 | 4 | Leidenfrost effect; Rotational motion; Self-propelled droplet; Temperature regime; Terminal velocity | Leidenfrost effect; Rotational motion; Self-propelled droplet; Temperature regime; Terminal velocity | Drops; High-temperature regime; Leidenfrost effect; Low-high; Lows-temperatures; Rotational motion; Self-propelled droplet; Temperature regimes; Terminal velocity; Threshold temperatures; Vapor films; Rotational flow | English | 2023 | 2023-10 | 10.1007/s12206-023-0941-4 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | Article | Numerical analysis of LiFePo4 battery thermal management system using cold plate | Lithium-ion batteries are widely used in electric vehicles because of their high capacity and voltage. However, some drawbacks to the battery stability exist. The aim of our research was to determine the optimum width and number of channels of a cold plate. To estimate the temperature distribution and heat transfer rate, the MSMD (multi-scale multi-dimensional) - Newman P2D model in ANSYS Fluent was used. Prior to comparing the heat transfer rates of the various battery surfaces using different cold plates, the surface temperature of the battery (LiFePO4) at discharge rates of 2C, 3C, and 4C was calculated to determine the battery characteristics. Subsequently, two cold plates were attached to both sides (front and back) of the batteries and the heat transfer rate of the battery surface in contact with the cold plate, and the pressure drop between the inlet and outlet of the channels during the discharge process were estimated. In addition, the j and f factors, which are used to estimate the cooling performance of the cold plates, were calculated. In determining the most efficient cold plate options, the trade-off between the heat transfer coefficient and the pressure drop is also important for the relationship between the two factors (j and f factors). © 2023, The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature. | Hwang, Seyeon; Choi, Rakjun; Kim, Seolha; Song, Minjae; Kim, TaeJoo | Department of Precision Mechanical Engineering, Kyungpook National University, Sangju, 37224, South Korea, Department of Mechanical Engineering, Gyeongsang National University, Jinju, 52828, South Korea; Department of Precision Mechanical Engineering, Kyungpook National University, Sangju, 37224, South Korea; Department of Precision Mechanical Engineering, Kyungpook National University, Sangju, 37224, South Korea, Department of Advanced Science and Technology Convergence, Kyungpook National University, Sangju, 37224, South Korea; Hanyung Alcobis Co. Ltd., Naju, 58209, South Korea; Neutron Science Division, Korea Atomic Energy Research Institute, Deajeon, 34057, South Korea | 58306053700; 58307082100; 57195257413; 58306467500; 15834332700 | shkim0731@knu.ac.kr; | Journal of Mechanical Science and Technology | J MECH SCI TECHNOL | 1738-494X | 1976-3824 | 37 | 6 | SCIE | ENGINEERING, MECHANICAL | 2023 | 1.5 | 62.6 | 0.24 | 2025-06-25 | 2 | Battery; Cold plate; Computational fluid dynamics; Thermal management | Battery management systems; Computational fluid dynamics; Drops; Economic and social effects; Iron compounds; Lithium compounds; Lithium-ion batteries; Phosphorus compounds; Plates (structural components); Pressure drop; Thermal management (electronics); Battery; Battery thermal managements; Cold plates; F factor; Heat transfer rate; High capacity; High-capacity; High-voltages; J factors; Thermal management systems; Temperature control | English | Final | 2023 | 10.1007/s12206-023-0540-4 | 바로가기 | 바로가기 | 바로가기 | |||||||
| ○ | ○ | Article | Parametric analysis of an oscillating wing energy harvester with a trailing edge flap | This study investigated the optimal energy harvesting conditions of an oscillating wing with a trailing edge flap for various parameters such as flap length and maximum wing and flap pitch angles. Numerical simulations were performed for flap lengths ranging from 20 % to 70 % of the chord length (c). The maximum wing pitch angle varied from 40 & DEG; to 75 & DEG;, whereas the maximum flap pitch angle varied from 15 & DEG; to 60 & DEG;. Results show that the power output performance of a large flap is higher than that of a short flap. This is because the incoming fluid is deflected relatively more vertically by a large flap than by a short flap at the same maximum wing and flap pitch angles. Consequently, the momentum change is enhanced in the direction of the heaving motion, which eventually improves the power output performance. In addition, the camber of the wing increases with flap length, leading to an increase in incoming fluid velocity on the leeward surface of the wing. This caused a decrease in leeward surface pressure for large flaps, resulting in an increased pressure difference on the wing surfaces, which assisted in enhancing the heaving force and power. The maximum power output was obtained at a maximum wing pitch angle of 70 & DEG; for a flap length 20 % of c, and it was reduced to 45 & DEG; for a flap length 70 % of c. However, the optimum maximum flap pitch angle varied between 35 & DEG; and 45 & DEG; for varying flap lengths. The power output and efficiency were improved by around 27 % and 21 %, respectively, compared with an oscillating wing without a flap, and this was achieved for a flap length 60 % of c with the maximum wing and flap pitch angles of 50 & DEG; and 45 & DEG;, respectively. | Alam, Maqusud; Sohn, C. H. | Kyungpook Natl Univ, Sch Mech Engn, Daegu 41566, South Korea | 58274982500; 36806852600 | chsohn@knu.ac.kr; | JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | J MECH SCI TECHNOL | 1738-494X | 1976-3824 | 37 | 7 | SCIE | ENGINEERING, MECHANICAL | 2023 | 1.5 | 62.6 | 1.09 | 2025-06-25 | 8 | 9 | Energy harvester; Oscillating wing; Flapping foil; Flap; Plate; Heaving; Pitching; Power | POWER-EXTRACTION; PERFORMANCE; PROPULSION; GENERATOR; AIRFOIL | Energy harvester; Flap; Flapping foil; Heaving; Oscillating wing; Pitching; Plate; Power | Energy harvesting; Energy Harvester; Flapping foil; Heaving; Oscillating wing; Pitch angle; Pitching; Plate; Power; Power output; Trailing edges; Thermoelectric power | English | 2023 | 2023-07 | 10.1007/s12206-023-0622-3 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | PREDICTION OF NONLINEAR STRESS-STRAIN BEHAVIORS WITH ARTIFICIAL NEURAL NETWORKS AND ITS APPLICATION FOR AUTOMOTIVE RUBBER PARTS | This study presents a new method to predict the stress-strain curves of rubber materials using artificial neural networks in order to reduce the numbers of tensile tests and shows its application. Various stress-strain curves used for the machine learning are obtained by uniaxial, biaxial, planar tension tests on the chloroprene rubber specimens. Tests are carried out at a rate of 0.01 strain/s at 23 degrees C, and the Mullins effect is reflected through five load-unload processes in the strain range of 0 similar to 20 %, 0 similar to 50 %, 0 similar to 70 %, and 0 similar to 100 %. After training, the stress-strain relationships in untrained ranges are predicted. The predictions are compared with the experimental data in the strain range of 0 similar to 100 %, which was previously reserved to confirm the prediction performance. It was predicted with errors within 0.04, 0.08, and 0.01 MPa for the uniaxial, biaxial, and planar tests, respectively. These small errors indicate predictions are reliable. For optimization of rubber parts, material constants of Ogden model are obtained using the predicted data in the strain of 0 similar to 60 % and 0 similar to 80 %. Dust covers are optimized to reduce stresses by the Taguchi method. The maximum von Mises stresses in the optimal designs are reduced by approximately 8 % and 14 %, compared to the initial ones. | Park, Junye; Kim, Cheol; Lee, Hyung-seok | Kyungpook Natl Univ, Dept Mech Engn, Daegu 41566, South Korea; Sanyang Rubber & Chem Co LTD, Res Ctr, 21-3,Gacheonjinae Gil, Ulsan 44953, South Korea | 58680634400; 55508786300; 55968268200 | kimchul@knu.ac.kr; | INTERNATIONAL JOURNAL OF AUTOMOTIVE TECHNOLOGY | INT J AUTO TECH-KOR | 1229-9138 | 1976-3832 | 24 | 6 | SCIE | ENGINEERING, MECHANICAL;TRANSPORTATION SCIENCE & TECHNOLOGY | 2023 | 1.5 | 62.6 | 0.23 | 2025-06-25 | 2 | 2 | Artificial neural network; Rubber properties; Nonlinear stress-strain; Optimum design; Dust covers | Artificial neural network; Dust covers; Nonlinear stress-strain; Optimum design; Rubber properties | Forecasting; Neural networks; Rubber; Strain rate; Stress-strain curves; Taguchi methods; Tensile testing; Dust cover; ITS applications; Neural network application; Non-linear stress-strain; Non-linear stress-strain behavior; Optimum designs; Rubber parts; Rubber properties; Strain ranges; Stress/strain curves; Dust | English | 2023 | 2023-12 | 10.1007/s12239-023-0119-1 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Pressure drop analysis of subsurface irrigation dripper system and its flow rate uniformity | Recently, water scarcity has become a serious social problem caused by global climate change. In agricultural water usage, subsurface irrigation techniques can be an alternative method to save water and improve the productivity and quality of crops. The technique supplies water by burying an irrigation hose 30 cm underground rather than placing it on the ground (topsoil), effectively preventing evaporation loss at the soil surface. In this study, we numerically calculated the pressure drop using a dripper installed inside an underground irrigation hose developed in Korea. The pumping load of the domestic product was evaluated in terms of momentum loss and compared with the most widely used Netafim products. The lower the pressure drop in the dripper, the higher the performance of the irrigation system in terms of stable water supply. Using computational fluid dynamics and experiments, we provide a meaningful evaluation of the domestic product in the irrigation system. | Kim, Jeongsik; Kim, Phil; Kim, Seolha; Kim, Jinhyun; Eum, Dukho; Lee, Sanghun | Kyungpook Natl Univ, Dept Precis Mech Engn, Sangju 37224, South Korea; Kyungpook Natl Univ, Dept Adv Sci & Technol Convergence, Seoul 37224, South Korea; Namkyung Co Ltd, Hwaseong 18626, South Korea; Rural Dev Adm, Natl Inst Crop Sci, Miryang 50424, South Korea | 57786618900; 58044160000; 57195257413; 57189383494; 57224525620; 56181002600 | shkim0731@knu.ac.kr; | JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | J MECH SCI TECHNOL | 1738-494X | 1976-3824 | 37 | 1 | SCIE | ENGINEERING, MECHANICAL | 2023 | 1.5 | 62.6 | 0.49 | 2025-06-25 | 5 | 4 | Computational fluid dynamics; Dripper irrigation; Pressure drop; Fluid flow | Computational fluid dynamics; Dripper irrigation; Fluid flow; Pressure drop | Climate change; Computational fluid dynamics; Drops; Hose; Irrigation; Pressure drop; Water supply; Agricultural water; Domestic product; Dripper irrigation; Fluid-flow; Global climate changes; Irrigation systems; Pressure drop analysis; Social problems; Water scarcity; Water usage; Flow of fluids | English | 2023 | 2023-01 | 10.1007/s12206-022-1221-4 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Study on reduction of squeal noise of disc brake system considering braking temperature of urban railway vehicle | The present study was conducted on the disc brake systems of urban railway vehicles to investigate the effects of braking temperature on squeal noise. A finite element method-based analytical model was constructed to predict the generation of squeal noise through the analysis of complex eigenvalues. The reliability of the analytical model was confirmed by verification with experimental results obtained from a test vehicle on an urban railway track in Korea. The braking temperature of the brake system was applied to the analytical model to analyze the effects of braking temperature on squeal noise. This article proposes a brake pad shape to reduce the impact of squeal noise caused by nonuniform contact between the brake disc and the brake pad due to braking temperature. The results from the present study can be used to reduce squeal noise further. | Ahn, Seoyeon; Sohn, Changhyun; Choi, Sungjin; Nam, Chanhyuk | Kyungpook Natl Univ, Daegu, South Korea; Korea Automot Technol Inst, Cheonan, South Korea | 57206666580; 36806852600; 55736571100; 57206674741 | chsohn@knu.ac.kr; | JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | J MECH SCI TECHNOL | 1738-494X | 1976-3824 | 37 | 5 | SCIE | ENGINEERING, MECHANICAL | 2023 | 1.5 | 62.6 | 0.85 | 2025-06-25 | 4 | 7 | Urban railway vehicle; Brake disc; Brake pad; Squeal noise; Complex eigenvalue analysis | CAST-IRON; FRICTION; VIBRATION; SPEED | Brake disc; Brake pad; Complex eigenvalue analysis; Squeal noise; Urban railway vehicle | Brakes; Eigenvalues and eigenfunctions; Locomotives; Railroads; Vehicles; % reductions; Brake disks; Brake pads; Complex eigenvalue analysis; Complex eigenvalues; Disk brake systems; Railway vehicles; Squeal noise; Urban railway; Urban railway vehicle; Analytical models | English | 2023 | 2023-05 | 10.1007/s12206-023-0402-0 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Luminescence Properties of Samarium Ion-Doped Silicoborate Glasses for Application in Optoelectronic Material | Gadolinium sodium silicoborate glasses doped with samarium ion (Sm:GNSB) are prepared by the melt quenching technique. The glasses are studied for their physical, optical, and luminescence properties. The density, molar volume, and refractive index of glass are investigated as a function of Sm2O3 concentrations. Addition of Sm3+ ions in the glass matrix shows several absorption peaks in the visible and near-infrared region, verified by the absorption spectra. The energy transfer from Gd3+ to Sm3+ is observed by photoluminescence (PL) emission spectra, which illustrates the strongest emission occurring at 600 nm ((4)G(5/2) -> H-6(7/2)). The PL decay time of 600 nm emission under 403 nm excitation decreases with increasing Sm2O3 concentrations. The color coordinates of the International Commission on Illumination chromaticity show different shades of orange color under different excitations. The result of radioluminescence shows a similar trend to PL emission spectra. Glasses doped with Sm3+ ions find potential use as an orange color-emitting optoelectronic device application. | Intachai, Nuttawadee; Kothan, Suchart; Wantana, Nuanthip; Kaewjaeng, Siriprapa; Htun, Khin Thandar; Kim, Hong Joo; Kaewkhao, Jakrapong | Chiang Mai Univ, Fac Associated Med Sci, Dept Radiol Technol, Ctr Radiat Res & Med Imaging, Chiang Mai 50200, Thailand; Nakhon Pathom Rajabhat Univ, Fac Sci & Technol, Phys Program, Muang 73000, Nakhon Pathom, Thailand; Nakhon Pathom Rajabhat Univ, Ctr Excellence Glass Technol & Mat Sci CEGM, Muang 73000, Nakhon Pathom, Thailand; Kyungpook Natl Univ, Dept Phys, Daegu 41566, South Korea | ; Kim, Hong Joo/AAE-1178-2022; Intachai, Nuttawadee/HOH-1735-2023 | 57221909427; 6507017165; 56267058700; 55871868200; 57879181000; 59051568100; 23974520300 | suchart.kothan@cmu.ac.th;jakrapong@webmail.npru.ac.th; | PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | PHYS STATUS SOLIDI A | 1862-6300 | 1862-6319 | 220 | 10 | SCIE | MATERIALS SCIENCE, MULTIDISCIPLINARY;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2023 | 1.9 | 62.7 | 0.5 | 2025-06-25 | 2 | 5 | luminescence; optoelectronics; samarium; silicoborate glasses | BOROSILICATE GLASS; ENERGY-TRANSFER; PHOTOLUMINESCENCE PROPERTIES; OPTICAL-PROPERTIES; BORATE; SM3+; SPECTROSCOPY; OXIDE; GD3+ | luminescence; optoelectronics; samarium; silicoborate glasses | Citrus fruits; Color; Emission spectroscopy; Energy transfer; Gadolinium compounds; Glass; Infrared devices; Ions; Refractive index; Samarium compounds; Sodium compounds; Absorption peaks; Glass matrices; Luminescence properties; Melt quenching techniques; Optical-; Optoelectronic materials; Photoluminescence emission spectra; Refractive index of glass; Samarium-ion; Silicoborate glass; Optoelectronic devices | English | 2023 | 2023-05 | 10.1002/pssa.202200440 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Optical, Photo, and X-Ray Luminescence Properties of Samarium Ions Doped with Borophosphate Glasses | The optical, photo, and X-ray luminescence properties of Sm3+ ion-doped Li2O-Al2O3-Gd2O3-B2O3-P2O5 glasses are evaluated. The glasses are fabricated by the melt quenching technique. The absorption spectra exhibit the hypersensitive transitions H-6(5/2)-> P-6(3/2) and H-6(5/2)-> F-6(7/2) at the visible and near-infrared range respectively. The glasses display four major transitions characteristic of Sm3+ ion for photoluminescence and X-ray luminescence, with the most intense one corresponding to the (4)G(5/2)-> H-6(7/2) transition. The best emitting samarium concentration obtained by X-ray excitation is compared to BGO crystals. The integral scintillation efficiency of glass is determined by total area under all of peak spectrum. The results indicate the promising application of these glasses in scintillators and for X-ray sensing devices. | Kiwsakunkran, Nuchjaree; Chanthima, Natthakridta; Kim, HongJoo; Kaewkhao, Jakrapong | Nakhon Pathom Rajabhat Univ, Fac Sci & Technol, Ctr Excellence Glass Technol & Mat Sci CEGM, Phys Program, 85 Malaiman Rd, Nakhon Pathom 73000, Thailand; Kyungpook Natl Univ, Dept Phys, Daegu 41566, South Korea | Chanthima, Natthakridta/HRC-8083-2023; Kim, Hong Joo/AAE-1178-2022 | 57203821928; 35361597600; 59051568100; 23974520300 | b_njr_kskk@hotmail.com; | PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | PHYS STATUS SOLIDI A | 1862-6300 | 1862-6319 | 220 | 10 | SCIE | MATERIALS SCIENCE, MULTIDISCIPLINARY;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2023 | 1.9 | 62.7 | 0.75 | 2025-06-25 | 6 | 6 | glasses; optical; photoluminescence; X-ray luminescence | SPECTROSCOPIC PROPERTIES; SM3+ IONS; PHOSPHATE-GLASSES; LITHIUM; BORATE; EMISSION; NIOBIUM; EARTH | glasses; optical; photoluminescence; X-ray luminescence | Alumina; Aluminum oxide; Glass; Infrared devices; Ions; Luminescence of inorganic solids; Samarium compounds; BGO crystals; Hypersensitive transitions; Luminescence properties; Melt quenching techniques; Near-infrared range; Optical-; Samarium-ion; Visible and near infrared; X ray luminescence; X-ray excitation; Photoluminescence | English | 2023 | 2023-05 | 10.1002/pssa.202200437 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Photoluminescence and X-Ray-Induced Luminescence Behavior of Sm2O3-Doped Oxyfluoroborate Scintillating Glass for Radiation Detecting Material | Various concentrations of samarium (Sm3+) ion-activated oxyfluoroborate (ANCB:AlF3-NaF-CaF2-B2O3) glasses are fabricated for its applications in red-emitting lasers and scintillators. From the optical absorption spectrum, omega(2,4,6) intensity parameters and several radiative parameters along with the high value of absorption (2.96 x 10(-21) cm(2)) and emission (14.13 x 10(-22) cm(2)) cross sections are calculated. By stimulating at 403 nm, a transition corresponding to (4)G(5/2) -> H-6(7/2) (596 nm) is very intense and emits orange-reddish luminescence of Sm3+ ion in ANCB glasses. The decay curves are fit to the Inokuti-Hirayama (I-H) model to determine the energy transfer in Sm3+: ANCB glasses. The X-ray-excited luminescence (XEL) spectra are determined with an X-ray source by supplying the voltage of 50 kV and current 30 mA. The lasing parameters like stimulated emission cross section (14.13 x 10(-22) cm(2)), optical gain (30.52 x 10(-22) cm(2 )s), and quantum efficiency (80%) are found to be high for the (4)G(5/2) -> H-6(9/2) transition of Sm3+ ions. The quality of the emitted red light for the ANCBSm0.5 glass is calculated in terms of the (x, y) color coordinates and correlated color temperatures (CCT < 3000 K). The integral scintillation efficiency of glasses shows the maximum value of 23% in comparison with Bi4Ge3O12 scintillation crystal. | Meejitpaisan, Piyachat; Doddoji, Ramachari; Kim, Hong Joo; Jayasankar, Chalicheemalapalli K. K.; Kaewkhao, Jakrapong | Nakhon Pathom Rajabhat Univ, Fac Sci & Technol, Phys Program, Nakhon Pathom 73000, Thailand; Nakhon Pathom Rajabhat Univ, Ctr Excellence Glass Technol & Mat Sci CEGM, Nakhon Pathom 73000, Thailand; Duy Tan Univ, Inst Res & Dev, Da Nang 550000, Vietnam; Duy Tan Univ, Fac Nat Sci, Da Nang 550000, Vietnam; Kyungpook Natl Univ, Dept Phys, Daegu 41566, South Korea; Sri Venkateswara Univ, Dept Phys, Tirupati 517502, India | Ramachari, D./C-1205-2019; Kim, Hong Joo/AAE-1178-2022 | 56006076500; 57214510277; 59051568100; 7003364577; 23974520300 | meejitpaisan@webmail.npru.ac.th;doddojiramachari@duytan.edu.vn; | PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | PHYS STATUS SOLIDI A | 1862-6300 | 1862-6319 | 220 | 10 | SCIE | MATERIALS SCIENCE, MULTIDISCIPLINARY;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2023 | 1.9 | 62.7 | 0.87 | 2025-06-25 | 8 | 8 | absorption (UV-visible-NIR); color coordinates; decay curves; excitation-emission spectra; X-ray-irradiated luminescence | ENERGY-TRANSFER; SM3+ IONS; OPTICAL-ABSORPTION; BORATE GLASSES; AL3+ IONS; EMISSIONS; SPECTRA; LASER; INTENSITIES; MECHANISM | absorption (UV–visible–NIR); color coordinates; decay curves; excitation–emission spectra; X-ray-irradiated luminescence | Absorption spectroscopy; Aluminum compounds; Bismuth compounds; Calcium fluoride; Color; Emission spectroscopy; Energy transfer; Fluorspar; Germanium compounds; Ions; Light absorption; Samarium compounds; Scintillation; Sodium compounds; Absorption (UV–visible–NIR); Color coordinates; Decay curves; Excitation-emission spectra; ITS applications; Optical absorption spectrum; Red emitting lasers; Scintillating glass; UV-visible; X-ray-irradiated luminescence; Glass | English | 2023 | 2023-05 | 10.1002/pssa.202200441 | 바로가기 | 바로가기 | 바로가기 | 바로가기 |
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