Análisis de la deformación estructural para pasajeros en autobuses de tipo interprovincial bajo la condición de vuelco de tipo terraplén por el método computacional FEM explicito transitorio no lineal

Abstract

This research aims to analyze the structural security for passengers in interprovincial buses in embankment-type rollovers by the FEM computational method non-linear transitory explicit. Employing a quail-quantitative analysis, the model of the best-selling chassis and bodywork in the country during 2019. The bus for analysis was modeled using Computer-Aided Design (CAD) meeting the requirements dimensions of the INEN NTE 1668 regulation and the current INEN RTE 043 regulation. The simulation methodology based on Computer-Aided Engineering (CAE) in the software LS-DYNA was developed under the consideration of optimization of computational resources. It was coupled with the dynamics of the embankment rollover to previous rollover studies. There were two groups of tests with the difference in depth of 1000 mm in the inclination of the embankment. Each group consisting of four trials with a 15 ° difference in angle incidence variation of the embankment and were subsequently, compared with the test described in regulation 66 of the United Nations Economic Commission for Europe. The veracity of the results was based on mesh quality and Hourglassing. The considered criteria for analysis deals with global bus displacement, mechanical strain with Von-Mises criterion, plastic deformation of the superstructure, and security zone invasion based on CEPE R66. It is concluded, that the embankment rollover tests yielded realistic and drastic results since the values in the analysis criteria were higher. Moreover, the structural members largely encroached on the safety zone compared to the light regulatory test results. It is recommended the use of CAE to reduce physical resources.