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|Type:||Artigo de periódico|
|Title:||Moiré Supported Stress Distribution Study On Gears [aplicação Da Técnica De Moiré No Estudo Da Distribuição De Cargas Em Engrenagens]|
Dal Fabbro I.M.
|Abstract:||Gears are widely employed in farm machinery transmission units. However, the severe environment imposed to the machine operation generates special problems associated to maintenance, as well as to the expected time life. Machinery which works on field are exposed to excessive dust, moisture, heat, chemicals, uneven mechanical loading and quite frequently the manufacturer recommendations are not adequate or not even available. Based on that, the proposal of new methods for strain and stress distribution analysis on gears under different working conditions is considered necessary. This research paper introduces the application of moiré methods to replace the popular strain gage technique. The proposed method is included in the photomechanical techniques and is considered of easy as well as of low cost application. The moiré family of methods is based on the projection of optical grids onto the object under analysis, generating optical fringes which displace as the object is deformed under mechanical loads. In this research work the tests were carried under different working conditions, as (1) non lubricated clean gears, (2) clean and lubricated, (3) lubricated and contaminated with soil. The comparison of these three situations indicated the influence of soil contamination as well as of the lubrication. The conclusion emphasizes the application of the proposed method to gear transmission design as well as to maintenance.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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