Durability Prediction of an Ultra-Large Mining Truck Tire Using an Enhanced Finite Element Method
Ultra-class mining trucks used for material haulage in rugged surface mining terrains experience premature tire fatigue failure in operation. Typical failures include belt edge separation, ply turn-up separation, and tread base and sidewall cracking. The use of reinforcing fillers and processing aids in tire compounds result in the formation of microstructural in-homogeneities in the compounds. This article presents an application of the critical plane analysis technique for predicting the fatigue life of the belt package of an ultra-large mining truck (CAT 795F) tire of size 56/80R63 in a surface coal mine. Experimental data obtained from extracted specimens (sidewall, tread, and belt edge region) of the tire are used to characterize the stress—strain and fatigue behavior of the modeled tire. The tire's duty cycle stresses and strains were obtained from finite element analysis of the rolling tire in Abaqus. Fatigue life calculations were performed in the rubber fatigue solver Endurica CL. Effects of inflation pressure, tire speed, and axle load on the fatigue life of the belt package under strain-crystallizing and non-crystallizing conditions of the belt compound are discussed. Specifically, the results show the belt edges to be critical regarding crack nucleation.
W. Nyaaba et al., "Durability Prediction of an Ultra-Large Mining Truck Tire Using an Enhanced Finite Element Method," Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, vol. 233, no. 1, pp. 161-169, SAGE Publications, Jan 2019.
The definitive version is available at https://doi.org/10.1177/0954407018795278
Mining and Nuclear Engineering
Keywords and Phrases
ABAQUS; Coal mines; Cracks; Elasticity; Finite element method; Mine trucks; Rubber; Strain; Structural design; Tires; Analysis techniques; Critical planes; Enhanced finite elements; Inflation pressures; Mining trucks; Reinforcing fillers; Straininduced crystallization; Surface coal mines; Fatigue of materials; Belt package; Critical plane analysis; Fatigue life; Mining truck tire; Strain-induced crystallization
International Standard Serial Number (ISSN)
Article - Journal
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