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    Friction-Induced Thermo-Mechanical Cracking in a Coated Medium With a Near Surface Cavity

    Source: Journal of Tribology:;1989:;volume( 111 ):;issue: 002::page 270
    Author:
    T. Y. Chen
    ,
    F. D. Ju
    DOI: 10.1115/1.3261904
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: This paper deals with the problem of an asperity-excited thermo-mechanical field in a medium with a thin surface layer and a near surface void defect. The solutions for the temperature distribution and stress state in the vicinity of the void are obtained. Numerical results are obtained using the material properties of Stellite III for both the coating and the substrate. The parametric effects of material properties in the coating and the substrate are considered by varying the corresponding property in the coating or the substrate. The stress field solutions of the coated medium with a cavity are compared with the solutions for a single material with a cavity. In the case of the single material with a cavity, while the thermal stress is much larger than the thermal stress of the no cavity case, the principal directions of the thermal stress are not significantly changed. However, for the case of a coated medium with a cavity, not only is the thermal stress much larger than that of the no cavity case, but also the principal directions of the thermal stress are changed. The principal directions of the thermal stress field depend on both the material properties and the ligament thickness (thickness between the wear surface and the top edge of the cavity). When the angle of the principal directions becomes larger, shear delamination will initiate at the coating/substrate interface.
    keyword(s): Friction , Fracture (Process) , Cavities , Thermal stresses , Coating processes , Coatings , Materials properties , Stress , Thickness , Delamination , Temperature distribution , Shear (Mechanics) AND Wear ,
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      Friction-Induced Thermo-Mechanical Cracking in a Coated Medium With a Near Surface Cavity

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    http://yetl.yabesh.ir/yetl1/handle/yetl/106071
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    contributor authorT. Y. Chen
    contributor authorF. D. Ju
    date accessioned2017-05-08T23:31:12Z
    date available2017-05-08T23:31:12Z
    date copyrightApril, 1989
    date issued1989
    identifier issn0742-4787
    identifier otherJOTRE9-28475#270_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/106071
    description abstractThis paper deals with the problem of an asperity-excited thermo-mechanical field in a medium with a thin surface layer and a near surface void defect. The solutions for the temperature distribution and stress state in the vicinity of the void are obtained. Numerical results are obtained using the material properties of Stellite III for both the coating and the substrate. The parametric effects of material properties in the coating and the substrate are considered by varying the corresponding property in the coating or the substrate. The stress field solutions of the coated medium with a cavity are compared with the solutions for a single material with a cavity. In the case of the single material with a cavity, while the thermal stress is much larger than the thermal stress of the no cavity case, the principal directions of the thermal stress are not significantly changed. However, for the case of a coated medium with a cavity, not only is the thermal stress much larger than that of the no cavity case, but also the principal directions of the thermal stress are changed. The principal directions of the thermal stress field depend on both the material properties and the ligament thickness (thickness between the wear surface and the top edge of the cavity). When the angle of the principal directions becomes larger, shear delamination will initiate at the coating/substrate interface.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleFriction-Induced Thermo-Mechanical Cracking in a Coated Medium With a Near Surface Cavity
    typeJournal Paper
    journal volume111
    journal issue2
    journal titleJournal of Tribology
    identifier doi10.1115/1.3261904
    journal fristpage270
    journal lastpage276
    identifier eissn1528-8897
    keywordsFriction
    keywordsFracture (Process)
    keywordsCavities
    keywordsThermal stresses
    keywordsCoating processes
    keywordsCoatings
    keywordsMaterials properties
    keywordsStress
    keywordsThickness
    keywordsDelamination
    keywordsTemperature distribution
    keywordsShear (Mechanics) AND Wear
    treeJournal of Tribology:;1989:;volume( 111 ):;issue: 002
    contenttypeFulltext
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