Experimental Analysis and Modelling of C-crack Propagation in Silicon Nitride Ball Bearing Element under Rolling Contact Fatigue.

Nazir, H., Khan, Z. A. and Saeed, A., 2018. Experimental Analysis and Modelling of C-crack Propagation in Silicon Nitride Ball Bearing Element under Rolling Contact Fatigue. Tribology international, 126 (October), pp. 386-401.

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DOI: 10.1016/j.triboint.2018.04.030

Abstract

A comprehensive model for predicting fatigue failure probability of surface c-shaped cracks in silicon nitride ball bearing elements under rolling contact fatigue (RCF) has been presented in this paper. Firstly, three-dimensional finite element analysis (FEA) is used to determine the stress intensity factors (SIFs) along the front of crack by using fracture mechanics approach. Then the propagation uncertainty of c-crack is evaluated by using surrogate models built upon highly accurate finite element modelling for equivalent stress intensity factors. Finally, the Monte Carlo Simulations combined with surrogate models are used to predict the failure probability of rolling ball bearing element. Simulation results reveal that it is possible to reduce the failure probability of ball bearing element up to 95% by reducing the maximum crack size and enhancing the fracture toughness of the ball material. The modelling results have been verified by experimental studies showing that the current predictions of c-crack fatigue failures were consistent with the experimental results. Fatigues crack initiation and propagation is a significant failure mechanism within ceramic ball bearing elements. It presents design and durability challenges for both manufacturers and users. A three-fold approach, to simulate fatigue propagation of c-shaped crack in rolling contact ceramic bearing element presented in this paper, is novel and will solve major durability issues within ceramic ball bearing elements subject to rolling contact fatigue.

Item Type:Article
ISSN:0301-679X
Uncontrolled Keywords:Silicon nitride; Ball bearing; Rolling contact fatigue; Finite element method; C-crack propagation; Monte-Carlo Simulation
Group:Faculty of Science & Technology
ID Code:30610
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:27 Apr 2018 15:47
Last Modified:13 Jun 2018 14:38

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