• Title/Summary/Keyword: Rubber Pressure

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A Study on the contact pressure and contact keep ratio of the collector gear of AGT (경량전철 집전장치의 접촉압력과 이선율에 대한 연구)

  • Lee Byung-Taek;Lim Won-Sik
    • Proceedings of the KSR Conference
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    • 2005.05a
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    • pp.314-319
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    • 2005
  • The rubber tire type AGT vehicles had been developed in a few years. And testing are finished on the test track. The extremely differ from heavy train with iron wheels are current collect type and wheel's characteristic. Analysis the current collect gear dynamic with vehicle dynamic and reduce the exchange rate shoes of current collect gear's.

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Dielectric Characteristics on the interface between insulation and insulation/semiconductor (절연 및 절연/반도전 계면하에서의 유전특성)

  • Kim, Dong-Shick;Kang, Moo-Seong;Jeong, Seong-Yung;Park, Dae-Hee
    • Proceedings of the KIEE Conference
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    • 1996.07c
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    • pp.1462-1465
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    • 1996
  • This paper evaluated dielectic characteristics on EPR, Polyester and insulation of these different interface. Dielectric characteristics of insulation rubber, Polyester increace greatly according as temperature increases have no effect on applied voltage and pressure. On the condition that interface exists, we confirmed that dielectric characteristics had been influence on semiconductor which had high $tan{\delta}$.

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Failure of Tire Belt Cord (타이어 Belt Cord 의 파단)

  • Kim, Seok-Nam;Takashi, Akasaka
    • Proceedings of the KSME Conference
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    • 2003.11a
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    • pp.1394-1400
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    • 2003
  • Tire subjected to inflation pressure and the load of passenger car has a important roll to dynamic performance characteristics of radial tires such as cornering and braking. These performance characteristics are directly related to the belt cord durability of tires. In this paper, we analyze the mechanism of belt cord broken due to cord tension at braking theoretically.

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A Study on the Improvement of Denture Base construction (의치상(義齒床) 개선(改選)에 관한 연구(硏究))

  • Shin, Moo-Hak
    • Journal of Technologic Dentistry
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    • v.14 no.1
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    • pp.133-138
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    • 1992
  • The base of a metal base denture that is made of acrylic resin base and metal in lined by soft liner named silicon rubber and its merits are as follows. 1. It has a good retention and fastness. 2. It has a good comfort and stability. 3. It is easy to mix various kinds of base materials. 4. It is easy to repair. 5. The pressure of bone and mucosal tissue is decreased and bite force is dispersed.

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3 D Atmospheric Pressure Plasma and Surface Treatment (3 D 대기압 플라즈마와 표면처리)

  • Song, Seok-Gyun;Choe, Bok-Gi;Gang, Deok-Won
    • Proceedings of the Korean Institute of Surface Engineering Conference
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    • 2007.04a
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    • pp.16-17
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    • 2007
  • 개발한 3 D 대기압 플라즈마 헤드와 그 특성 및 장단점 및 그에 의한 표면 개질 특성을 나타낸다. 플라즈마 처리 높이가 75 mm 이상의 시편도 처리할 수 있는 3 D 대기압 플라즈마 헤드를 개발하였으며, 그에 의한 신발 재료 EVA, PU, Rubber의 표면 개질 특성을 평가하였다. 또한 반도체 및 FPD 처리용 대기압 플라즈마도 개발하였다.

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High-Performance Multimodal Flexible Tactile Sensor Capable of Measuring Pressure and Temperature Simultaneously (압력과 온도측정 기능을 갖는 고성능 플렉시블 촉각센서)

  • Jang, Jin-Seok;Kang, Tae-Hyung;Song, Han-Wook;Park, Yon-Kyu;Kim, Min-Seok
    • Journal of the Korean Society for Precision Engineering
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    • v.31 no.8
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    • pp.683-688
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    • 2014
  • This paper presents a high-performance flexible tactile sensor based on inorganic silicon flexible electronics. We created 100 nm-thick semiconducting silicon ribbons equally distributed with 1 mm spacing and $8{\times}8$ arrays to sense the pressure distribution with high-sensitivity and repeatability. The organic silicon rubber substrate was used as a spring material to achieve both of mechanical flexibility and robustness. A thin copper layer was deposited and patterned on top of the pressure sensing layer to create a flexible temperature sensing layer. The fabricated tactile sensor was tested through a series of experiments. The results showed that the tactile sensor is capable of measuring pressure and temperature simultaneously and independently with high precision.

Study on Vibration Induced by Fluid at a Water Pressure Reducing Valve through Structure-Fluid Coupled Analysis (구조-유체 연성해석을 통한 수도용 감압밸브에서의 유체유발진동에 관한 연구)

  • Park, Woo-Cheul;Lee, Joong-Kuen;Kim, Il-Gyoum;Park, Yong-Suk
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.13 no.10
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    • pp.4371-4377
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    • 2012
  • In this paper, the structure-fluid coupled analysis is carried out in order to examine the cause of the vibration induced by fluid in the pressure-reducing valves for water. It is confirmed that there is the noise at the area of low frequency of 250Hz by measuring noise at pressure reducing valve. The flow analysis is performed by the commercial software ANSYS/CFX. The flow velocity of about 40 m/s is formed by nozzle effect, and so negative pressure is happened in the pressure reducing valve. The structure analysis is carried out with the load condition of pressure distribution by flow formed in valve. The rubber material at disk is deformed to the extent of closing up flow passage. It is confirmed that the disc deformation which is occurred repeatedly is due to noise and vibration at the pressure reducing valve.

The Effect of the Nipple Protrusions on the Deformation Characteristics of the High-Pressure Hose in the Manufacturing Process (호스 제작시 니플 돌기부가 변형 특성에 미치는 영향)

  • Kim, Hynug-Je;Kim, Byung-Tak
    • Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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    • 2002.05a
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    • pp.51-56
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    • 2002
  • In this paper, the stress and deformation characteristics of the high pressure hose that have the hose components such as rubber, braid and steel( sleeve and nipple) during the manufacturing process, and analyzed using the [mite element method The swaging process is modeled with a contact problem in identical conditions of real circumstances, and the properties of hose materials based on the experimental data are used in this analysis. Also, to understand the effect of the nipple protrusions on the deformation characteristics of a power steering hose among the steel materials shape of the existing model, and changed the steel materials shape partially, and compared with the existing model.

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Development of Packer-Dilatometer Method (팩커를 이용한 공내재하 시험 방법 개발)

  • Kern Shin Yoon
    • The Journal of Engineering Geology
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    • v.8 no.2
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    • pp.189-203
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    • 1998
  • Packer-dilatometer techniques, which are borehole-dilatometer techniques using commercial rubber packer, were developed to measure the deformability of rocks. Packer-dilatometers for 0.5 inch, AX, BX, NX and HX size boreholes were developed and were used for rock deformability measurements in the field. In the packer-dilatometer method, the packer pressurizes the borehole-wall and the borehole deformation is determined by the amount of fluid injected into the packer. A detailed description of the theoretical development of quantitative interpretation of the packer-dilatometer method; apparatus, setup and procedures for the determining of calibration constants; contact pressure determination and field tests using the packer-dilatometer are provided.

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