Journal article
A high-fidelity approach for vehicle mobility simulation: Nonlinear finite element tires operating on granular material
Journal of terramechanics, Vol.72, pp.39-54
08/2017
DOI: 10.1016/j.jterra.2017.04.002
Abstract
•New approach to high-fidelity simulation of off-road vehicle-soil dynamics.•Integration of detailed nonlinear FEA tire, MBD vehicle, and DEM soil models.•An HPC cosimulation framework is tailored to solve the equations of motion.•Several numerical vehicle mobility measures are analyzed.•Effects of tire inflation pressure and soil cohesion on mobility are discussed.
Assessing the mobility of off-road vehicles is a complex task that most often falls back on semi-empirical approaches to quantifying the vehicle–terrain interaction. Herein, we concentrate on physics-based methodologies for wheeled vehicle mobility that factor in both tire flexibility and terrain deformation within a fully three-dimensional multibody system approach. We represent the tire based on the absolute nodal coordinate formulation (ANCF), a nonlinear finite element approach that captures multi-layered, orthotropic shell elements constrained to the wheel rim. The soil is modeled as a collection of discrete elements that interact through contact, friction, and cohesive forces. The resulting vehicle/tire/terrain interaction problem has several millions of degrees of freedom and is solved in an explicit co-simulation framework, built upon and now available in the open-source multi-physics package Chrono. The co-simulation infrastructure is developed using a Message Passing Interface (MPI) layer for inter-system communication and synchronization, with additional parallelism leveraged through a shared-memory paradigm. The formulation and software framework presented in this investigation are proposed for the analysis of the dynamics of off-road wheeled vehicle mobility. Its application is demonstrated by numerical sensitivity studies on available drawbar pull, terrain resistance, and sinkage with respect to parameters such as tire inflation pressure and soil cohesion. The influence of a rigid tire assumption on mobility is also discussed.
Details
- Title: Subtitle
- A high-fidelity approach for vehicle mobility simulation: Nonlinear finite element tires operating on granular material
- Creators
- Antonio Recuero - University of Wisconsin–MadisonRadu Serban - University of Wisconsin–MadisonBryan Peterson - University of IowaHiroyuki Sugiyama - University of IowaParamsothy Jayakumar - United States Department of the ArmyDan Negrut - University of Wisconsin–Madison
- Resource Type
- Journal article
- Publication Details
- Journal of terramechanics, Vol.72, pp.39-54
- Publisher
- Elsevier Ltd
- DOI
- 10.1016/j.jterra.2017.04.002
- ISSN
- 0022-4898
- eISSN
- 1879-1204
- Language
- English
- Date published
- 08/2017
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984196608302771
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