Fatigue Damage Investigation of Ultra-Large Tire Components
Off-road ultra-large tires experience different modes of heat-related fatigue failure in operation due to inherent material defects that grow into visible cracks under service loads. This study implements the cracking energy density theory to predict nucleation life of selected components of a 56/80R63 tire. The method uses an assumed intrinsic flaw, a fatigue crack growth law, and a rubber constitutive law to compute local crack driving forces from strain history loads obtained via FEA. The results show that the lower sidewall, belt endings, and inner tread lug corners are the critical regions for crack initiation with lives 5.03 x 105, 1.207 x 105, and 2.01 x 104 cycles, respectively.
W. Nyaaba et al., "Fatigue Damage Investigation of Ultra-Large Tire Components," International Journal of Fatigue, vol. 119, pp. 247-260, Elsevier Ltd, Feb 2019.
The definitive version is available at https://doi.org/10.1016/j.ijfatigue.2018.07.009
Keywords and Phrases
Cracking energy density; Fatigue crack growth; Finite element analysis; Strain-induced crystallization; Tire
International Standard Serial Number (ISSN)
Article - Journal
© 2019 Elsevier Ltd, All rights reserved.
01 Feb 2019