• Title/Summary/Keyword: Shear heating

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Studies on the Factors Affecting Quality and Textural Characteristics of Artificial Gluten Meat (글루텐 인조육의 품질특성에 영향을 주는 요인과 물성에 관한 연구 - 1보 : 품질특성에 영향을 주는 요인)

  • 박춘란;김기숙;윤서석;장주익
    • Korean journal of food and cookery science
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    • v.4 no.1
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    • pp.9-16
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    • 1988
  • These experiments were carried out to study the factors affecting quality and textural characteristics in the preparation of artificial gluten meat (AGM). These results were compared with the raw beef on its properties. The results obtained were summarized as follows: 1, The affective factors on the color of AGM were walnut, oil, salt, onion, water, interactions of oil and water, and interactions of heating temperature and heating time. 2. Shear force was affected by the factors of walnut, onion, water and interactions of walnut and oil. 3. Walnut, oil, onion, salt, water, interactions of walnut and oil, interactions of oil and water, and heating temperature affected on hardness, springiness, cohesiveness and chewiness. 4. Walnut and water affected on the water holding capacity.

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Drag Reduction in Turbulent Channel flow with Periodically Arrayed Heating and Cooling Strips (난류 채널 내 냉·열판 부착에 의한 마찰저항 감소)

  • Yoon, Hyun-Sik;Chun, Ho-Hwan
    • Journal of the Society of Naval Architects of Korea
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    • v.42 no.6 s.144
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    • pp.608-618
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    • 2005
  • A new technique giving significant drag reduction in turbulent shear flows has been proposed by using the buoyancy effect to generate periodic spanwise motion. Such spanwise motion can be obtained by arranging heating and cooling strips periodically aligned in the spanwise direction of a vertical channel, where the streamwise mean flow is perpendicular to the gravity vector The strip size has been changed in order to obtain the optimum size corresponding to the maximum drag reduction. The bulk Reynolds number, $ Re_{m} = U_{m} \delta / \nu \$ is fixed at 2270 while Grashof numbers is changed between $10^{6}$ to $10^{7}$. As Grashof number increases, considerable drag reduction can be obtained, At the highest Grashof number, an optimum strip size of about 250 wail units gives drag reduction of about 35$\%$. The greater the Grashof number, the smaller the strip size attains the maximum drag reduction.

Study on the manufacturing of high-frequency heating Japanese cedar laminated board by finger jointing method (1) - Gluing characteristics of Japnese cedar board by PVAc emulsion adhesives - (핑거접합방식에 의한 삼나무의 고주파가열 집성판 제조에 관한 연구 (1) - 삼나무 판재의 초산비닐수지 접착특성 -)

  • So Won-Tek;Chai Jyung-Ki
    • Journal of the Korea Furniture Society
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    • v.16 no.1
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    • pp.1-8
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    • 2005
  • This experiment was carried out to investigate the gluing characteristics of poly vinyl acetate emulsion adhesive(PVAc) on the Cryptomeria japonica laminated boards. This sample trees are major planting species and have been planted in southern district for a long time. The optimum gluing conditions for laminated board were summarized as follows; the amount of spreading glue, assembly time, clamping pressure, and clamping time for PVAc resin were $200g/m^2$, 10min., $5kg/cm^2$, and 6hrs., respectively, and the relative formulae between extension ratio(x) and block shear strength(y) was $y=-9.6x+85.2(R^2=0.95)$.

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A study of estimation of filling phase condition in injection molding process (사출성형의 충전조건 선정에 관한 연구)

  • Jo, Y.M.;Kwon, O.J.;Kim, J.D.
    • Journal of the Korean Society for Precision Engineering
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    • v.12 no.3
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    • pp.110-118
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    • 1995
  • The filling phase analysis of the injection molding process for thermoplastics was applied to predict pressure, themperature and shear stress in the test mold, and the results were compared with the experiment using 30% glass fiber added ABS resin. The finite difference method was used in the analysis considering the effects of heat transfer between molten polymer and mold wall, and also frictional heating by shear flow. The analysis results were considered as a method to improve the quality and the productivity of injection molding process. Using the analysis results, the molding factors such as mold-ability of polymers, performance of injection molding machine, positioning of gate and dimendsioning of runner in the injection molding process can be estimated at the design stage of mold for good quality and productivity.

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A Study on the Filling Pattern Imbalance by Width of Gate in the Thin Plate Injection Molding (박판 사출 성형에서 게이트 폭에 따른 충전 불균형에 대한 연구)

  • Jung, Tae-Sung;Jang, Jin-Hyeok;Kim, Jon-Sun
    • Design & Manufacturing
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    • v.11 no.1
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    • pp.14-18
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    • 2017
  • Recently, the injection-molded products are lighter, and thinner than ever. In this work, Injection molding simulation was conducted to analysis the filling pattern imbalance in high speed injection molding process for thin-wall injection component, 8 inches LGP. Numerical analysis shows that shear heated polymer near the side wall causes filling imbalance between center and side of cavity. Short shot experiments were conducted and compared with simulation results. Filling imbalance ratio showed a tendency to increase for wider fan gate.

Influence of Fiber Breaks on the Frictional Work in a Continuous Fiber-Reinforced Ceramic Matrix Composite (장섬유로 보강된 세라믹 복합재료에서 섬유파단이 마찰일에 미치는 영향)

  • 조종두
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.18 no.7
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    • pp.1730-1737
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    • 1994
  • Theoretical equations for an influence of fiber breaks on the frictional heating phenomenon in a uniaxially fiber-reinforced ceramic matrix composite are formulated. The microslip and gross slip phases are considered for deriving the equations. During a complete loading/unloading cycle, the work done against friction is derived. In order to estimate interfacial shear in a unidirectionally reinforced ceramic matrix composite which has fiber fractures as well as matrix cracks, parametric studies using the derived equations are done. In a case of less than 10% fiber fractures, additional frictional work due to fiber breaks can be neglected compared to the rest.

Continuous Fabrication Process of Rheology Material by Rotational Barrel Equipment (회전식 바렐 장치에 의한 레올로지 소재의 연속 제조 공정)

  • Seo P. K.;Jung Y. S.;Kang C. G.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2004.10a
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    • pp.103-106
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    • 2004
  • The new rheology fabrication process has been developed to rheo die casting and rheo forming process. Thixoforming process has disadvantages in terms of induction reheating process, scrap recycling, loss of raw material and cycle time. Therefore, to reduce the number of process, new rheology fabrication process with specially designed the rotational barrel type equipment has been proposed to apply in various part productions. The barrel type equipment, which could continuously fabricate the rheology materil, was specially designed to have a function to control cooling rate, shear rate and temperature. During the continuous rotation of barrel with a constant temperature, the shear rate is controlled with the rotation speed. The barrel surface has both the induction heating system and the cooling system to control the temperature of molten metal. By using this system, the effect of the rotation speed and the rotation time on the microstructure was widely examined. The possibility for the rheoforming process was investigated with microstructural characteristic.

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Study on Optimaization of Heating Element Gap in Resistance Welding using Thermoplastic resin (열가소성 수지 저항용접에서 발열체 간격의 최적화에 관한 연구)

  • Yun, Ho-Cheol;Im, Pyo;Im, Jae-Gyu
    • Proceedings of the KWS Conference
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    • 2007.11a
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    • pp.26-28
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    • 2007
  • This research is concerned with a study of failure strength evaluation on heat element gap at resistance welding. The failure strength of resistance welded joint is changed by welding factor like as current(power level), welding time(total energy), pressure etc. and another heat element factor like as number of element line, element gap etc. Tensile-shear tests were carried out with the single-lap specimen using polypropylene(PP). The failure mechanism and optimization of gap was discussed in order to explain the tensile-shear strength evaluation on heat element gap at resistance welding. Orthogonal array was used by fractional factorial design for efficient experiments.

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Optical components assembly by AIO bonding method (AIO 에 의한 Glass 광학부품 Bonding)

  • Potapov, S.;Ku, Janam;Yoon, Eungyeoul;Chang, Donghoon
    • Proceedings of the Optical Society of Korea Conference
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    • 2002.07a
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    • pp.254-255
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    • 2002
  • Optical elements such as small glass lenses or optical fibers can be permanently bonded to substrates using Al inter-layer by applying Pressure and heating. As an example aspherical lens was bonded on a silicon V-groove. The bonding has high shear strength and good thermal cycling stability.

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Tensile Properties of Rapid Consolidated Thermoplastic Composites (고속압밀 열가소성수지 복합재료의 인장 특성)

  • 김홍건;최창용;유기현;김성철;양성모;노홍길
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2002.10a
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    • pp.504-507
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    • 2002
  • Glass fiber reinforced PET (Poly-Ethylene-Terephthalate) matrix composite was manufactured by rapid press consolidation technique as functions of temperature, pressure and time in pre-heating, consolidation and solidification stages. The optimal manufacturing conditions for this composite were discussed based on the void content, tensile, interlaminar shear, and impact properties. A tensile test was attempted to investigate the mechanical properties of the composite. It is found that the level of crystallinity and microstructure affects on the tensile properties substantially.

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