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    A Molecular Dynamics Analysis of Surface Interference and Tip Shape and Size Effects on Atomic-Scale Friction

    Source: Journal of Tribology:;2005:;volume( 127 ):;issue: 003::page 513
    Author:
    J. Yang
    ,
    K. Komvopoulos
    DOI: 10.1115/1.1843829
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Molecular dynamics simulations of a rigid diamond tip sliding on a face-centered-cubic copperlike substrate were performed in order to examine the dependence of the friction coefficient on the tip–substrate interference and the shape and size of the tip. For a square-base prismatic tip, the friction force is mainly due to interactions of atoms at the front face of the tip and substrate atoms ahead of the tip, while the normal force is due to interactions of atoms at the tip base and substrate atoms under the tip. However, for a pyramidal tip, both normal and friction forces are mainly due to interactions between atoms at the front face of the tip and substrate atoms in the vicinity of the sliding tip. Consequently, the friction coefficient is either sensitive (square-base prismatic tip) or insensitive (pyramidal tip) to the tip–substrate interference distance. In addition, tip size and orientation effects on the friction coefficient were observed with square- and triangle-base prismatic tips, respectively. Lower friction coefficients were obtained with a larger base area and edge-front sliding with a triangle-base prismatic tip. The results provide insight into atomic-scale friction anisotropies due to the effects of the tip size and shape and the tip–substrate interference.
    keyword(s): Force , Friction , Atoms , Diamonds , Shapes , Molecular dynamics simulation , Molecular dynamics AND Deformation ,
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      A Molecular Dynamics Analysis of Surface Interference and Tip Shape and Size Effects on Atomic-Scale Friction

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    http://yetl.yabesh.ir/yetl1/handle/yetl/132675
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    contributor authorJ. Yang
    contributor authorK. Komvopoulos
    date accessioned2017-05-09T00:17:54Z
    date available2017-05-09T00:17:54Z
    date copyrightJuly, 2005
    date issued2005
    identifier issn0742-4787
    identifier otherJOTRE9-28733#513_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/132675
    description abstractMolecular dynamics simulations of a rigid diamond tip sliding on a face-centered-cubic copperlike substrate were performed in order to examine the dependence of the friction coefficient on the tip–substrate interference and the shape and size of the tip. For a square-base prismatic tip, the friction force is mainly due to interactions of atoms at the front face of the tip and substrate atoms ahead of the tip, while the normal force is due to interactions of atoms at the tip base and substrate atoms under the tip. However, for a pyramidal tip, both normal and friction forces are mainly due to interactions between atoms at the front face of the tip and substrate atoms in the vicinity of the sliding tip. Consequently, the friction coefficient is either sensitive (square-base prismatic tip) or insensitive (pyramidal tip) to the tip–substrate interference distance. In addition, tip size and orientation effects on the friction coefficient were observed with square- and triangle-base prismatic tips, respectively. Lower friction coefficients were obtained with a larger base area and edge-front sliding with a triangle-base prismatic tip. The results provide insight into atomic-scale friction anisotropies due to the effects of the tip size and shape and the tip–substrate interference.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleA Molecular Dynamics Analysis of Surface Interference and Tip Shape and Size Effects on Atomic-Scale Friction
    typeJournal Paper
    journal volume127
    journal issue3
    journal titleJournal of Tribology
    identifier doi10.1115/1.1843829
    journal fristpage513
    journal lastpage521
    identifier eissn1528-8897
    keywordsForce
    keywordsFriction
    keywordsAtoms
    keywordsDiamonds
    keywordsShapes
    keywordsMolecular dynamics simulation
    keywordsMolecular dynamics AND Deformation
    treeJournal of Tribology:;2005:;volume( 127 ):;issue: 003
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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