Slip-shakedown analysis of a system of circular beams in frictional contact |
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Authors: | N. Antoni Q.S. Nguyen P. Ragot |
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Affiliation: | aTEUCHOS SA, Groupe SAFRAN, Département Mécanique des Structures, 10, rue du Fort de Saint Cyr, 78180 Montigny Le Bretonneux, France;bLaboratoire de Mécanique des Solides, Ecole Polytechnique, Palaiseau, France;cRENAULT S.A.S., Direction de l’Ingénierie Mécanique, Rueil Malmaison, France |
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Abstract: | In automotive components, the cumulative microslip phenomenon is often observed for engine assemblies. This phenomenon results in an accumulation of the relative slips in a preferred tangential direction on the contact interface of two solids under cyclic loadings. A significant relative displacement may occur and leads to the assembly failure. In particular, a global rotation of the bearing shell may result from this mechanism of cumulated slips in conrod big end systems. To discuss this rotation problem, a model of two circular beams in frictional contact and submitted to a periodical rotating load is considered here. The aim is to give some simplified estimates of the critical rotation load based on a slip-shakedown analysis. The discussion holds for Tresca friction and can be extended to Coulomb friction under the assumption of small coupling. The static and kinematic slip-shakedown approaches are discussed. The obtained analytical results are shown to be in agreement with the finite element computations. |
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Keywords: | Cumulative microslip phenomenon Slip-shakedown Cyclic loading Circular beam Contact Friction |
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