Rupture of tyres on large mining vehicles: Physics and consequences

Manderson, Daniel (2004). Rupture of tyres on large mining vehicles: Physics and consequences Honours Thesis, School of Engineering, The University of Queensland.

       
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Author Manderson, Daniel
Thesis Title Rupture of tyres on large mining vehicles: Physics and consequences
School, Centre or Institute School of Engineering
Institution The University of Queensland
Publication date 2004
Thesis type Honours Thesis
Supervisor David Mee
Total pages 110
Language eng
Subjects 0913 Mechanical Engineering
Formatted abstract
There are few recorded incidents of tyre explosion on large mining vehicles. It is a rare phenomenon that has predominantly occurred on haul trucks and has led to severe truck damage and fatalities. The aim of this report is to gain an improved understanding of tyre explosions on haul trucks, particularly the over-pressures that develop as a result of the shock waves propagating from the explosion.

The two main mechanisms for tyre explosion, pyrolysis and diffusion, are explained. The simple blast wave model of Vanderstraeten, Lefebvre and Berghmans (1995) is presented as a possible tool for modelling tyre explosion, and the basic behaviour of a three-dimensional explosion is discussed. The CFD software packages L1d and MB_CNS are evaluated as possible tools for modelling tyre explosion. Performance of the modelling tools is assessed by comparison with the results of numerical simulations published by Vanderstraeten, Lefebvre and Berghmans, and Liang, Wang and Chen (2002).

The three modelling tools were applied to the Channar catastrophic tyre incident (Cutler 2004) to estimate the peak pressures involved. More than 40 simulations were conducted, beginning with crude assumptions and refined and increased in complexity to incorporate additional aspects of the geometry.

It is found that L1d and the model of Vanderstraeten et al. are too simple to capture haul truck geometry adequately. Predicted over-pressures are sensitive to the initial conditions in the tyre, the size of the rupture area, and to model (and haul truck) geometry.

A simplified technique to model explosion of a truck tyre is presented. It utilizes MB_CNS in an axisymmetric capacity to predict over-pressure at any location on a haul truck following explosion. The model predicted an over-pressure in the range of 29 kPa to 65 kPa at the rear window of the driver’s cabin of the haul truck involved in the Channar incident.
Keyword Large Mining Vehicles

Document type: Thesis
Collection: UQ Theses (non-RHD) - UQ staff and students only
 
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Created: Thu, 20 Nov 2014, 16:34:33 EST by Asma Asrar Qureshi on behalf of Scholarly Communication and Digitisation Service