Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
OPERATION VARIABLES INFLUENCE ON STRUCTURAL INTEGRITY OF MINING HAUL TRUCK’S CHASSIS
Submission Author:
Tarcísio Augusto Santos Almeida , MG
Co-Authors:
Tarcísio Augusto Santos Almeida, Jánes Landre Júnior, Thiago Ferreira, FERNANDO TEIXEIRA
Presenter: Tarcísio Augusto Santos Almeida
doi://10.26678/ABCM.COBEM2021.COB2021-1559
Abstract
Mining haul trucks operate in severe conditions, transporting large payloads along unpaved roads during full-day services. These conditions induce premature failures in truck’s chassis, requiring corrective maintenance or even early fleet renewal, causing financial losses or decreasing mine productivity due to truck's unavailability. Several operation parameters, such as speed, road design and conditions, amount and arrangement of payload, affect the chassis structural integrity, but is difficult to know which of them are most harmful, since they act simultaneously, preventing us from knowing their individual contribution to failures. This paper proposes an analysis methodology of chassis structural behavior of mining haul trucks, submitted to different operation variables, allowing the evaluation of their individual influences and harmfulness. Using concepts of fatigue life calculations, damage accumulation and vehicle dynamics, a haul truck chassis 3D model was subjected to several operational configurations, through a numerical method using a meshfree software. The results present a mapping of the 40 most critical spots in a commercial haul truck’s chassis and a failure ranking between them. In addition, this paper shows a comparative analysis of fatigue life consumption effect of different operation variables such as uphill and downhill grades, lateral road slope (super-elevation), curvatures radii, traffic speed and payload balance. Knowledge about the individual influence of these operation variables on the chassis service life allows truck’s users and manufacturers to better evaluate the harmfulness of different mine sites, create engineering actions and good practice manuals to mitigate the effects of most injurious operations and have a better failure predictability
Keywords
mining haul truck, structural integrity, Fatigue Life, operation variables
