Experimental Study and Finite Element Simulation of Bending Fretting Fatigue for Tempered 42CrMo Steel

E-ISSN： 1662-9795|2016|725|394-398

ISSN： 1013-9826

Source： Key Engineering Materials, Vol.2016, Iss.725, 2017-02, pp. : 394-398

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Abstract

In this paper, experiments of the plain bending fatigue for cyclic softening material tempered 42CrMo steel plate and the bending fretting fatigue for tempered 42CrMo steel plate against 52100 bearing steel cylinder are conducted. The difference of the bending fretting fatigue and the plain bending fatigue for tempered 42CrMo steel is analyzed, and the effect of cyclic bending loads with the same normal load on the fatigue lives is discussed. Besides, finite element simulations of the bending fretting fatigue process for tempered 42CrMo steel by ABAQUS are carried out. In this simulation, an advanced cyclic elasto-plastic constitutive model is implemented in to ABAQUS as a user material subroutine (UMAT) in order to consider the influence of ratchetting and cyclic softening feature. And a simplified equivalent two-dimensional plane strain finite element model with an equivalent normal force obtained from the three-dimensional finite element model is adopted. From the numerical simulation, the influence of cyclic bending loads on the bending fretting fatigue for tempered 42CrMo steel is discussed, and then the bending fretting fatigue lives are estimated by employing Smith–Watson–Topper critical plane criteria. Comparison with the corresponding experiments shows that the estimated results are in good agreement with the experimental results.