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Experimental and numerical rolling contact fatigue study on the 32CrMoV13 steel
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Advisor(s)
Abstract(s)
The aim of this work is to study pure rolling contact fatigue in 32CrMoV13 quenching
and tempering steel. The study involves both experimental and numerical work. The
influence of the roughness and the residual stresses on the mechanisms and zones of
cracking were studied. The results show a rapid reduction in roughness during the first
minute of test but even so there will be specimen deterioration. The residual stress profile
after rolling contact tests have high compression values in the surface and at a depth
of approximately 240 μm, which is related with the Hertzian maximal shear stress. The
numerical simulation of the Hertzian loading was used both to determine the elastic
shakedown of thematerial and to apply a high-cycle multiaxial fatigue criterion. The threedimensional
finite element analysis used in the numerical calculation includes elastic-linear
kinematic hardening plastic material and allows the introduction of an initial residual stress
state. Taking into account the elastoplastic load induced by the Hertz pressure, low-cycle
fatigue tests were used to characterize the mechanical properties of the material. In order
to validate the numerical simulation, the results of the calculation after elastic shakedown
were compared with the values measured by X-ray diffraction after rolling contact tests.
The results showed a reasonable agreement between calculated and measured stresses.
The Dang Van high-cycle multiaxial fatigue criterion showed a good relationship with
the experimental findings.
Description
Keywords
Fatigue contact Multiaxial fatigue criterion Numerical simulation Residual stress Roughness
Pedagogical Context
Citation
Coelho, L. e outros - Experimental and numerical rolling contact fatigue study on the 32CrMoV13 steel, Fatigue & Fracture of Engineering Materials & Structures, 27, 811-823, 2004.