Title: Prediction of energy dissipation of off-road vehicles using smoothed-particle hydrodynamics techniques

Authors: Fatemeh Gheshlaghi; Aref Mardani; Zeinab El-Sayegh

Addresses: Department of Automotive, Mechanical, and Manufacturing Engineering, University of Ontario Institute of Technology, Oshawa, ON, L1H 7K4, Canada ' Department of Automotive, Mechanical, and Manufacturing Engineering, University of Ontario Institute of Technology, Oshawa, ON, L1H 7K4, Canada ' Department of Automotive, Mechanical, and Manufacturing Engineering, University of Ontario Institute of Technology, Oshawa, ON, L1H 7K4, Canada

Abstract: This paper studies the energy dissipated during experimental and simulated procedures for the pressure-sinkage and shear-strength test. These tests are performed using a clayey-loam soil and modelled as smoothed-particle hydrodynamics (SPH) technique in Visual Environment's Pam-Crash software. The hydrodynamic elastic plastic material is used to define the equation of state for the clayey-loam soil. The soil is modelled at five different levels of compaction to represent multi-pass of a tyre over soil. The soil calibration is performed using the pressure-sinkage and direct shear-strength test and validated using experimental data from a soil bin facility. The energy dissipation is calculated using the soil sinkage values at every pass of wheel. Finally, the results of experimental and simulation dissipation energy are discussed and the effect of the tyre multi-pass on dissipated energy is investigated and presented. This research will further continue to model an agricultural FEA tyre over the clayey-loam soil to compute tyre performance and interaction characteristics.

Keywords: energy dissipation; pressure-sinkage; bevameter; direct shear-strength; multi-pass; SPH; smoothed-particle hydrodynamics.

DOI: 10.1504/IJVSMT.2020.111680

International Journal of Vehicle Systems Modelling and Testing, 2020 Vol.14 No.2/3, pp.149 - 162

Received: 23 Dec 2019
Accepted: 09 Feb 2020

Published online: 06 Dec 2020 *

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