ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Fretting is a major cause of surface damage and fretting fatigue crack initiation at theinterface between contact materials subjected to small oscillatory movements. In the present paper, amulti-layered model is developed to analyze fretting fatigue of functionally graded materials (FGMs)with arbitrarily varying shear modulus under plane strain-state deformation. Based on the fact that anarbitrary curve can be approached by a series of continuous but piecewise linear curves, the FGM isdivided into several sub-layers and in each sub-layers the shear modulus is assumed to be a linearfunction while the Poisson’s ratio is assumed to be a constant. With the model, the problem of frettingcontact of two similar functionally graded coated cylinders is investigated. By using the transfermatrix method and Fourier integral transform technique, the problem is reduced to two uncoupledCauchy singular integral equations. The tangential contact pressures in the slip and stick zones arecalculated by solving the equations numerically. The results show that appropriate gradual variationof the shear modulus can significantly alter the pressures in the contact zone. This may lead tosuppression of fretting fatigue cracks at the edges of the contact zone and thus modify the frettingcontact damage
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.324-325.291.pdf
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