The competitive role of wear and RCF in a rail steel

A descriptive model of wear evolution in rolling bearings

A new fatigue frictional contact crack propagation model with the coupled X-FEM/LATIN method

A significant development in condition monitoring techniques has been observed over the years. The scope of condition monitoring has been shifted from defect identification to its measurement, which was later on extended to automatic prediction of defect. This development is possible because of advancement in the area of signal processing. A number of signal processing and decision making techniques are available each having their own merits and demerits. A specific technique can be most appropriate for a given task, however, it may not be suitable or efficient for a different task. This paper reviewed recent and traditional research, and development in area of defect diagnosis, defect modelling, defect measurement and prognostics. Also it highlights the merit and demerit of various signal processing techniques. This paper is written with the objective to serve as guide map for those who work in the field of condition monitoring.

Role of Signal Processing, Modeling and Decision Making in the Diagnosis of Rolling Element Bearing Defect: A Review

A model for the simulation of the interactions between dynamic tooth loads and contact fatigue in spur gears

The competitive aspect of surface and subsurface fatigue crack propagation in hardened components subjected to rolling contact fatigue is highlighted, the former being greatly affected by the working conditions (in particular the presence of tangential stresses and lubricant), the latter depending mainly on the inclusions content and on the hardness profile. In order to determine which one of these kinds of damage is favoured, initial data consisting of contact load, rolling and sliding speed, theological properties of the lubricant, material hardness and inclusions content are necessary. The concurrent role of asperities and Hertzian stress field in determining surface crack propagation is explained with the approach of the “quiescent zone.” calculating the stress intensity factors range in a contact cycle and considering the pumping effect of the fluid possibly present on the contact surface. Inherent defects (especially oxides) are thought to be responsible for subsurface cracks origin and the Murakami...

Surface and Subsurface Cracks in Rolling Contact Fatigue of Hardened Components

Stress intensity factor range and propagation mode of surface cracks under rolling–sliding contact

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Surface and Subsurface Cracks in Rolling Contact Fatigue of Hardened Components

Stress intensity factor range and propagation mode of surface cracks under rolling–sliding contact