• Title/Summary/Keyword: 미끄럼접촉 해석

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Temperature Rise Analysis of Sliding Contact Surfaces in Lubrication Considering Elastic Deformation (탄성변형을 고려한 윤활 상태에서 거친 표면의 미끄럼 접촉온도 해석)

  • Cho Yong-Joo;Kim Byoung-Sun;Lee Sang-Don
    • Tribology and Lubricants
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    • v.22 no.3
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    • pp.137-143
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    • 2006
  • The sliding contact interface of machine components such as bearings, gears frequently operates in lubrication at the inception of sliding failure under high loads, speed and slip. The surface temperature at the interface of bodies in a sliding contact is one of the most important factors influencing the behavior of machine components. Most surface failure in sliding contact region result from frictional heat generation. However, it is difficult to measure temperature rise experimentally. So the calculation of the surface temperature at a sliding contact interface has long been an interesting and important subject for tribologist. The surface temperature rise is related in contact pressure, sliding speed, material properties and lubrication thickness. Though roughness, load, ect all of the condition, are same, film thickness varies with velocity. In this study, surface temperature rise due to frictional heating in lubrication is calculated with various velocities. Surface film shearing and dry solid asperity contact are used to simulate the change of frictional heat in lubricated contact

Study on material properties of $Cu-TiB_2$ nanocomposite ($Cu-TiB_2$ 나노 금속복합재의 물성치에 대한 연구)

  • Kim Ji-Soon;Chang Myung-Gyu;Yum Young-Jin
    • Composites Research
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    • v.19 no.2
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    • pp.28-34
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    • 2006
  • [ $Cu-TiB_2$ ] metal matrix composites with various weight fractions of $TiB_2$ were fabricated by combination of manufacturing process, SPS (self-propagating high-temperature synthesis) and SPS (spark plasma sintering). The feasibility of $Cu-TiB_2$ composites for welding electrodes and sliding contact material was investigated through experiments on the tensile properties, hardness and wear resistance. To obtain desired properties of composites, composites are designed according to reinforcement's shape, size and volume fraction. Thus proper modeling is essential to predict the effective material properties. The elastic moduli of composites obtained by FEM and tensile test were compared with effective properties from the original Eshelby model, Eshelby model with Mori-Tanaka theory and rule-of-mixture. FEM result showed almost the same value as the experimental modulus and it was found that Eshelby model with Mori-Tanaka theory predicted effective modulus the best among the models.