Abstract
The basic aim in this work is to present a new technique to analyze the contact surfaces developed by the contact between the tires and the structural pavements by numerical simulations, using 3D finite element formulations with contact mechanics. For this purpose, the Augmented Lagrangian method is used. This study is performed just putting the tires on the structural pavement. These tires and the structural pavement are discretized by finite elements under large 3D elastoplastic deformation. The real loads (of aircrafts, trucks or cars) are applied directly on each tire and by contact mechanics procedures, the real contact area between the tires and the pavement surface is computed. The penetration conditions and the contact interfaces are investigated in details. Furthermore, the pressure developed at the contact surfaces is automatically calculated and transferred to the structural pavement by contact mechanics techniques. The purpose of this work research is to show that the contact area is not circular and the finite element techniques can calculate automatically the real contact area, the real geometry and its stresses and strains. In the end of this work, numerical results in terms of geometry, stress and strain are presented and compared to show the ability of the algorithm. These numerical results are also compared with the numerical results obtained by the commercial program ANSYS.
Highlights
Several formulations concerning treatment of the contact interface have been presented in the literature, especially when the contact interface of two contacting bodies is rough
The basic aim in this work is to present a new technique and procedures to model pavement structures, using contact mechanics techniques to define the contact area and its forces transferred to the pavement
The basic aim of this paper is to present a model to solve pavement structures using contact mechanics techniques under large 3D deformation
Summary
Several formulations concerning treatment of the contact interface have been presented in the literature, especially when the contact interface of two contacting bodies is rough. It was used the parameters of the aircraft EMB 145 (regional jet) (BANDEIRA; MERIGHI; FORTES, 2006; BANDEIRA; MERIGHI, 2005) For this purpose, taking into account elastoplastic constitutive equations, a finite element approach using contact mechanics formulations are applied to simulate pavement structures under finite three-dimensional deformation. The procedure to calculate stresses, deformations and displacements are performed by placing the tires on the top pavement surface and by applying the contact mechanics procedures to get the numerical results. These procedures are presented in details in this article. Some classical numerical examples are compared with the theoretical one and with the elastic constitutive law
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