Modellazione FEM del comportamento visco-elastoplastico di conglomerati bituminosi per uso stradale

Research output: Contribution to journalArticlepeer-review

Abstract

[automatically translated] In this work it was decided to formulate a model to describe the mechanical behavior of the bituminous conglomerate of road use that can be easily implemented in the FEM software programs in common use, in order to apply a thorough structural analysis of flexible pavements. After a brief review of the existing constitutive models, starting from the simplest to the most complex, it is possible to conclude that a proper modeling method is to divide the material response, in terms of total strain, the various components and describe them all separately . In comparison with the experimental results, the proposed model is able to describe the main aspects of the mechanical response of asphalt concrete. In particular, the elasto-plastic component of the model is described by the law of Von Mises, with isotropic hardening, while the viscous component is described by a power law of creep, as a function of temperature, the load application time and the stress level. In order to calibrate the model proposed, with the aid of ADINA calculation code, were carried out FEM numerical simulations of the test of uniaxial compression creep in a predetermined range of temperatures and stress levels, and the results were compared, finally, with the corresponding experimental results of the tests performed in the laboratory. of the load application time and the stress level. In order to calibrate the model proposed, with the aid of ADINA calculation code, were carried out FEM numerical simulations of the test of uniaxial compression creep in a predetermined range of temperatures and stress levels, and the results were compared, finally, with the corresponding experimental results of the tests performed in the laboratory. of the load application time and the stress level. In order to calibrate the model proposed, with the aid of ADINA calculation code, were carried out FEM numerical simulations of the test of uniaxial compression creep in a predetermined range of temperatures and stress levels, and the results were compared, finally, with the corresponding experimental results of the tests performed in the laboratory.
Original languageItalian
Pages (from-to)56-86
Number of pages0
JournalMECCANICA DEI MATERIALI E DELLE STRUTTURE
Volume1
Publication statusPublished - 2010

Cite this