الفهرس 
AcknowledgementOnly 14 pages are availabe for public view
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Abstract
’lihe present study is concerned with thu llluchanism of wear on holical teeth. and thG interrelation betweE.:in wsar and gear meshing performance.
In order to achieve such a goal, W0al’ was considered to be a result
a- Stress (load and geometry). b- Sliding spa’=ld.
inter-relation botween wear and performanoJ lies in the fact that wear of a co~pound characteristic, that is; profile wear results in a the involuto shape which gives riso to dynamic loads which in turn
The work tiu’ough this investigation has b.:lfm proceeded in the
manner :
Finit;;; aldmGnt method was appliad to obtain helical gear tooth stiffness (maasured on pIano of actiOll in the transverse plana) thus, load distribution betvf06n ho1ica1 gear toeth and load distribution along contact lines of mating halical teeth has bean obtain0d. Combined stiffnGs8 of two meshing teeth has been also obtained during a compluta cycle of tooth loading.
Mathomatioal analysis for tha effoct of involute profile error
on prossuro angle and instantaneous gaar ratio have been obtained and formulae were cl.moluded.
3 A single pair of meshing gears have boon simulated to simple spring mass system representing oxaotly the condition of contact between m~shing gears and considoring the number of pairs of teeth i~ contact. Differential oquations of motion for the simulatod modal have been writt~. The solution of these equations gavo the dynamic loading existing between each pair of teeth in contact.
Wear meohanism have been obtained by substituting the obtained values of load and sliding spood i~to the wear model given by :
WOUl< rate = Const. x Sliding spJod x Load.
PerformanoG of the mechanical mas;dng systom can be now studied by oonsidering the wear after certain period as a new error added to the original involute profil~ error, which when substituted into the differential equations of motion of the system yields the new operating dynamic t80th loading.
6. Sliding speed ’on tooth flank haP bean studied (Appendix I). 7~ Contact lines between helical goar tJ8th has been treated mathematioally (Appendix