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    High-Speed Frictional Heating of an Elastic Medium With a Near-Surface Horizontal Line Crack

    Source: Journal of Tribology:;1993:;volume( 115 ):;issue: 001::page 56
    Author:
    T. Y. Chen
    ,
    Frederick D. Ju
    DOI: 10.1115/1.2920986
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: This paper studies the effect of high-speed frictional heating over the surface of an elastic material, which has a near surface horizontal line crack. The frictional heating is represented by a high-speed moving heat source, since the mechanical loading effect is much smaller than the thermal effect in the resulting stress field. Finite difference methods are employed to compute the temperature field and the displacement field, taking into consideration the characteristic singularity at the crack tip. The temperature field solutions are first computed, using the method of heat balance. The thermo-mechanical solutions follow with particular interest in the vicinity of the line crack as represented by the stress intensity factors at the crack tip. It was found that both the open mode and the shear mode occur, as a result of the excitation of the moving thermal load. The paper also presents effects on the stress intensity factors from varying the thermal and the mechanical properties of the medium, and the location of the line crack from the wear surface. The depth at which the maximum thermal stress occurs is an exponential function of the Peclet number, as in the cases when there is no defect in the wear material and when there is a near surface cavity. Albeit, the “critical depth” reduces with increasing Peclet number and severity of the defect.
    keyword(s): Fracture (Materials) , Heating , Stress , Wear , Heat , Temperature , Shear (Mechanics) , Thermal stresses , Temperature effects , Mechanical properties , Cavities , Displacement AND Finite difference methods ,
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      High-Speed Frictional Heating of an Elastic Medium With a Near-Surface Horizontal Line Crack

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    contributor authorT. Y. Chen
    contributor authorFrederick D. Ju
    date accessioned2017-05-08T23:42:42Z
    date available2017-05-08T23:42:42Z
    date copyrightJanuary, 1993
    date issued1993
    identifier issn0742-4787
    identifier otherJOTRE9-28501#56_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/112722
    description abstractThis paper studies the effect of high-speed frictional heating over the surface of an elastic material, which has a near surface horizontal line crack. The frictional heating is represented by a high-speed moving heat source, since the mechanical loading effect is much smaller than the thermal effect in the resulting stress field. Finite difference methods are employed to compute the temperature field and the displacement field, taking into consideration the characteristic singularity at the crack tip. The temperature field solutions are first computed, using the method of heat balance. The thermo-mechanical solutions follow with particular interest in the vicinity of the line crack as represented by the stress intensity factors at the crack tip. It was found that both the open mode and the shear mode occur, as a result of the excitation of the moving thermal load. The paper also presents effects on the stress intensity factors from varying the thermal and the mechanical properties of the medium, and the location of the line crack from the wear surface. The depth at which the maximum thermal stress occurs is an exponential function of the Peclet number, as in the cases when there is no defect in the wear material and when there is a near surface cavity. Albeit, the “critical depth” reduces with increasing Peclet number and severity of the defect.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleHigh-Speed Frictional Heating of an Elastic Medium With a Near-Surface Horizontal Line Crack
    typeJournal Paper
    journal volume115
    journal issue1
    journal titleJournal of Tribology
    identifier doi10.1115/1.2920986
    journal fristpage56
    journal lastpage60
    identifier eissn1528-8897
    keywordsFracture (Materials)
    keywordsHeating
    keywordsStress
    keywordsWear
    keywordsHeat
    keywordsTemperature
    keywordsShear (Mechanics)
    keywordsThermal stresses
    keywordsTemperature effects
    keywordsMechanical properties
    keywordsCavities
    keywordsDisplacement AND Finite difference methods
    treeJournal of Tribology:;1993:;volume( 115 ):;issue: 001
    contenttypeFulltext
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