Abstract
The paper presents experiences gained during work with numerical model of Geo Metro vehicle used for simulations of crash tests with road safety barriers. Attention is drawn to the subject of tire/wheel breakage during collision events. Some methods for improvement of the model are presented in the paper. Several results for the normative vehicle numerical tests are introduced. Simulations were carried out using LS-DYNA finite element code with solver version R8.1.
Highlights
Finite element modelling plays important role in civil engineering and automotive industry
When numerical vehicle passes those tests it may be considered as a reliable tool in crash test simulations
In this paper LS-DYNA finite element code [3,4] version R8.1 has been used for crash test modelling and numerical analysis
Summary
Finite element modelling plays important role in civil engineering and automotive industry. Mechanical behaviour of wheels and their parameters in numerical model (e.g. stiffness of material, air pressure inside tires, capability of tire blowout, etc.) are crucial for proper simulation of full-scale experimental tests. Applicable balance between the computation time and the level of detail of the model must be preserved The reason for this is that the numerical model must still be suitable for use during crash test simulation against e.g. 60 m long road safety systems. Due to the large number of numerical simulations that have to be performed during the conducted by the authors research project RID 3A "Road Safety Equipment", some improvements in the Geo Metro numerical model had to be introduced to fulfil the requirements of the standards [1,2] and at the same time to provide a reasonable calculation time. Standard initial conditions of the vehicle are set using translational velocity of all parts and angular velocities about corresponding wheel’s rotational axis
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