Abstract In this paper, the dynamic behavior of rolling element bearings with localized faults on inner and outer rings is investigated. A nonlinear mathematical model developed five degrees freedom considering rotor unbalance. bearing model, nonlinearity caused by Hertzian contact forces radial internal clearance. The fourth-order Runge–Kutta technique used to solve coupled equations motion nu...

Rolling bearing is one of the most widely used elements in rotary machines. In this paper, a novel method is proposed to extract early fault features and diagnosis the early fault accurately for rolling bearing. Wavelet Energy Entropy is introduced as a feature parameter for bearing state monitoring and least square support vector machine (LS-SVM) is used for early fault diagnosis. In order to ...

Austenite is a semi-stable phase in most stainless steels that deforms to martensite under Md30 and forms martensitetype ά and ε due to the deformation in the steels. Since the distribution of strain induced martensite plays animportant role in achieving desired properties, the main objective of the present work is to model martensitedistribution of ά during cold rolling using...