TITLE:
Importance of the Running-In Phase on the Life of Repairable Systems
AUTHORS:
Salima Beleulmi, Ahmed Bellaouar, Mohammed Lachi
KEYWORDS:
Running-In Phase; The Useful Lifespan; Bearings; Numerical Modeling
JOURNAL NAME:
Engineering,
Vol.6 No.2,
February
10,
2014
ABSTRACT: The running-in
phase is the first stage of the bearing lifespan. However, this phase is very
short and extremely important for the future lifespan of the rolling bearing
because it is what sets the stabilized state in terms of roughness of the parts
in contact, residual geometry and surface residual stresses, which are key
factors in the fatigue resistance of mechanical parts. Several numerical and
experimental studies have highlighted the importance of the running-in phase in two scales (macroscopic, meso and
microscopic). Due to its high flexibility, the approach presented in this work
is a numerical modeling of the running-in phase which has been based on the
Weibull distribution. The obtained results confirm the importance of the
running-in phase on the lifespan of bearings or other mechanism whose
functioning requires an adaptation phase of parts in contact. It also concludes that if the running-in phase has been
performed correctly, there is a marked improvement in reliability. The curves
describe the useful saved time of lifespan according to the scale of the
running-in phase.