About: DISCIPLINES IN TRIBOLOGY (deleted 11 Apr 2008 at 12:03)

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DISCIPLINES INVOLED ON INVESTIGATION OF MATERIAL'S TRIBOLOGY Prepared By: Masoud Sheykhi ,Sarcheshmeh copper complex ,Kerman , Iran. It is customary to introduce the subject by reference to idealized bearings of the types shown in theImage:Conformal conditions.pdf , Image:Counterformal conditions.pdf.pdf and Image:KEY.pdf. The load W when associated with frictional force μW produces the resultant applied force which is tangential to the friction circle. W may be constant in magnitude and in direction or it may vary in magnitude and also in direction relative to the system as a whole. The varying load encountered in engines is especially important. Similarly ,velocity may vary and in the general case both surfaces may be considered as moving. In the diagram , velocities U1 and U2 are measur

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rdfs:label	DISCIPLINES IN TRIBOLOGY (deleted 11 Apr 2008 at 12:03)
rdfs:comment	DISCIPLINES INVOLED ON INVESTIGATION OF MATERIAL'S TRIBOLOGY Prepared By: Masoud Sheykhi ,Sarcheshmeh copper complex ,Kerman , Iran. It is customary to introduce the subject by reference to idealized bearings of the types shown in theImage:Conformal conditions.pdf , Image:Counterformal conditions.pdf.pdf and Image:KEY.pdf. The load W when associated with frictional force μW produces the resultant applied force which is tangential to the friction circle. W may be constant in magnitude and in direction or it may vary in magnitude and also in direction relative to the system as a whole. The varying load encountered in engines is especially important. Similarly ,velocity may vary and in the general case both surfaces may be considered as moving. In the diagram , velocities U1 and U2 are measur
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Day	11(xsd:integer)
Month	April
concern	The topic is covered at Tribology. This is merely an essay on the topic, and possibly a copyright violation as well.
Time	317.0
Timestamp	20080411051728(xsd:double)
Year	2008(xsd:integer)
abstract	DISCIPLINES INVOLED ON INVESTIGATION OF MATERIAL'S TRIBOLOGY Prepared By: Masoud Sheykhi ,Sarcheshmeh copper complex ,Kerman , Iran. It is customary to introduce the subject by reference to idealized bearings of the types shown in theImage:Conformal conditions.pdf , Image:Counterformal conditions.pdf.pdf and Image:KEY.pdf. The load W when associated with frictional force μW produces the resultant applied force which is tangential to the friction circle. W may be constant in magnitude and in direction or it may vary in magnitude and also in direction relative to the system as a whole. The varying load encountered in engines is especially important. Similarly ,velocity may vary and in the general case both surfaces may be considered as moving. In the diagram , velocities U1 and U2 are measured relative to the line of loading , i.e. in accordance with Eulerian notation. In the absence of lubrication the intensity of heat generation of an unlubricated surface would be proportional to the relative velocity U1- U2.Severity of duty of a surface would depend on the time during which an element thereof was exposed to the rubbing under load. Thus if U2 were zero the material of the lower component would be continuously heated. If, however , U2 was finite, fresh material could be brought continuously to the area of contact and the heat damage would be less severe. This leads to the concept of the slide-sweep ratio which is a measure of quantifying the nature of the duty imposed on an element of a rubbing pair. This is a number which relates separately to each surface and is obtained by dividing the relative velocity of the two surfaces by the rate at which metal passes through the line of loading.Thus for surfaces U1 and U2 the slide-sweep ratio would be (U1- U2)/ U1 and (U1- U2)/ U2 respectively.This factor is clearly a measure of the condition imposed on the material of the surface and would determine the resistance to wear and the nature of consequential damage. References [1] F.T.BARWELL ,University College of Swansea ,Glam ,1967. [2] CAMPBELL,J.,LOVE,P.P.,MARTIN,F.A. and RAFIQUE,S.D."Bearings for reciprocating machinery-A review of the present state of theoretical , experimental and service knowledge, 1968.

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