• Title/Summary/Keyword: Wear Equation

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Development of Wear Equation according to Friction Coefficient and Temperature using a Dual Leaf-Spring in the Sliding Test (판스프링을 사용한 마모실험에서 마찰계수와 마찰온도를 고려한 마모식의 개선)

  • Kim, Jung-Hyun
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.5 no.1
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    • pp.19-26
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    • 2006
  • The wear behavior as the hardness of the sliding elements on the dry wear has been investigated using a dual leaf-spring. The materials of the specimens are used as ten kinds along their hardness. In this study, both upper and lower specimens have been used the same materials. Using experimental data, we figured the relationship between wear coefficient and friction coefficient, and the relationship between wear coefficient and friction temperature. Also we combined friction temperature and friction coefficient instead of wear coefficient. We substituted this into wear equation of Archard. The result had been derived a newly wear equation in using dual leaf-spring wear system.

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A dry wear behavior as hardness difffrence in a dual disc on disc sliding wear tests (디스크 언 디스크 시스템에서 경도에 따른 건식 마모거동)

  • Kim Junghyun
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.13 no.5
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    • pp.16-23
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    • 2004
  • The wear behavior as the hardness of the sliding elements on the dry wear has been investigated using a disc on disc configuration. The materials of the specimens are used as ten kinds along their hardness. In this study, both upper and lower specimens have been used the same materials. Using experimental data, we figured the relationship between wear coefficient and friction coefficient, and the relationship between wear coefficient and friction temperature. Also we combined friction temperature and friction coefficient instead of wear coefficient. We substituted this into wear equation of Archard. The result had been derived a newly wear equation in disc on disc wear system.

A Study of Unlubricated Sliding wear of materials as hardness difference (경도의 차이에 따른 재료들의 비윤활 미끄럼 마모에 대한 연구)

  • Kim, Jung-Hyun
    • Journal of the Korean Society of Industry Convergence
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    • v.7 no.4
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    • pp.369-376
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    • 2004
  • It is shown that the rate of wear can be related to on 'index of wear intensity'. Since both upper and lower specimens have used the same hardness values, equivalent hardness of 'index of wear intensity' used the mean hardness value of specimens. This index is derived from the external variables of load, sliding speed and the hardness of the sliding pairs. The wear behavior as the hardness of the sliding elements on the dry wear has been investigated using a disc on disc configuration. The materials of the specimens are used as ten kinds along their hardness. Using experimental data, we figured the relationship between wea rate and index of wear intensity. The result had been derived a newly wear equation in disc on disc wear system.

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Wear Behavior as Hardness Difference of Material in the Dry Sliding Wear Tests of Using Leaf-Spring (판스프링을 사용한 건식마모실험에서 재료경도에 따른 마모거동)

  • Kim, Jung-Hyun
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.17 no.3
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    • pp.27-33
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    • 2008
  • It is shown that the rate of wear can be related to 'index of wear intensity' using a leaf-spring in the disc on disk on wear tests. Since both upper and lower specimens have used the same hardness values, equivalent hardness of 'the index of wear intensity' used the mean hardness value of specimens. This index is derived from the external variables of load, sliding speed and the hardness of the sliding pairs. The wear behavior as the hardness of the sliding elements on the dry wear has been investigated using a disc on disc configuration. The materials of the specimens are used as ten kinds along their hardness. Using experimental data, we figured the relationship between wear rate and index of wear intensity. A newly wear equation had been derived the result using a leaf-spring in disc on disc wear system.

The research on wear simulation between wheel and rail at inclined of Korea High Speed Railway (경사선로에서의 차륜과 레일간 상호작용에 따른 마모 현상 연구)

  • Moon Tai-Seon;Seo Bo-Pil;Choi Jeung-Hum;Han Dong-Chul
    • Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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    • pp.112-117
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    • 2003
  • The purpose of this work is to general approach to numerically simulating wear in rolling and sliding contact area between wheel and rail interface based on the analysis of dynamics with general MBS package. A simulation scheme is developed that calculates the wear at a detailed level. The estimation of material removal follows Archard's wear equation which states that the reduction of volume is linearly proportional to the sliding distance, the normal applied load and the wear coefficient and inverse proportional to hardness. The main research application is the wheel-rail contact of Korea High Speed Railway.

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The wheel wear prediction of a Korea High Speed Train using a FE-analysis (유한요소해석을 이용한 한국형 고속철도 차량의 차륜 마모 예측)

  • Choi Jeong Heum;Han Dong-Chul;Kim Ki-Hwan
    • Proceedings of the KSR Conference
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    • pp.409-414
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    • 2005
  • It is difficult to apply the Hertz theory to the wheel-rail contact problem which has the complicated geometric form and plastic deformation. Therefore, we perform the elastic-plastic FE analysis and compare the results with those of Hertz theory. Kalker's simplified theory of rolling contact is used to discretize the contact patches and calculate local traction and slip. The wear volumes are calculated using Archard wear equation.

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Wear Characteristics of Atomic Force Microscope Tip

  • Chung, Koo-Hyun;Kim, Dae-Eun
    • International Journal of Precision Engineering and Manufacturing
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    • v.5 no.2
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    • pp.39-45
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    • 2004
  • Atomic Force Microscope (AFM) has been widely used in micro/nano-scale studies and applications for the last few decades. In this work, wear characteristics of silicon-based AFM tip was investigated. AFM tip shape was observed using a high resolution SEM and the wear coefficient was approximately calculated based on Archard's wear equation. It was shown that the wear coefficient of Si and ${Si}_3$$N_4$ tips were in the range of ${10}^{-1}$~${10}^{-3}$and ${10}^{-3}$~${10}^{-4}$, respectively. Also, the effect of relative humidity and sliding distance on adhesion-induced tip wear was investigated. It was found that the tip wear has more severe for harder counter surface materials. Finally, the probable wear mechanism was analyzed from the adhesive and abrasive interaction point of view.

Development of Wear Analysis Model of Precision Small Rotating Device (정밀소형회전기구의 마모해석모델에 관한 연구)

  • 여은구;조선형;이용신
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • pp.355-358
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    • 2003
  • Recently, micro forming process technology have been developed since the size of machine parts become the crucial factor for minimizing of products in general electronic products. Most small machine parts consist of gear and rotation axis and the wear by mechanical contact is known as the primary factor for life reduction of high precision machine part. Lots of studies for mechanical wear and friction have been reported and many researches of MEMS technology have been studied recently. But just few studies for wear of micro or milli sized machine part have teen implemented. In this research, the wear equation is suggested according to the contact shape of axial part in micro or milli sized machine part. And wear analysis model which can predict the magnitude of wear through this suggested equation with numerical analysis program.

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The research on wear simulation between wheel and rail for Korea High Speed Railway (고속철도 차량의 차륜과 레일간의 마모 예측)

  • Choi Jeung-Hum;Moon Tai-Seon;Kim Ki-Hwan;Han Dong-Chul
    • Proceedings of the KSR Conference
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    • pp.369-376
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    • 2003
  • The purpose of this work is to general approach to numerically simulating wear in rolling and sliding contact area between wheel and rail interface based on the analysis of dynamics characteristics with general MBS package. A simulation scheme is developed that calculates the wear at a detailed and various level. The estimation of material removal follows Archard's wear equation which states that the reduction of volume is linearly proportional to the sliding distance, the normal applied load and the wear coefficient and inverse proportional to hardness. The main research application is the wheel-rail contact of Korea High Speed Railway.

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The study on wheel wear analysis in UIC60 and KS50N of Korea High Speed Railway (한국형 고속철도의 전용선과 기존선의 차륜 마모 특성 연구)

  • Kim Youn-Jung;Choi Jeong-Heum;Han Dong-Chul;Kim Young-Gukk
    • Proceedings of the KSR Conference
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    • pp.1115-1120
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    • 2005
  • characteristic of wear between wheel and rail is important factor of judgement to maintenance. KHST is optimized on an exclusive rail, UIC60. but also KHST is running on the variety existing line as well as KS50N, KS60 et,c. Hail profile of KS50N is dissimilar to DIC60. So we can predict that characteristic of wear is embodied also different. In this paper. we deduced the force and point of contact position between wheel and rail through multi-dynamics analysis and predicted wear of wheel and rail through contact problem analysis. we used simplified theory of kallker on contact problem, and Predicted the wear phenomenon of wheel using archard wear equation about each condition.

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