Cyclic behavior of elasto-plastic porous materials subjected to triaxial loading conditions - 11e COLLOQUE NATIONAL EN CALCUL DES STRUCTURES, CSMA 2013, Giens Accéder directement au contenu
Communication Dans Un Congrès Année : 2013

Cyclic behavior of elasto-plastic porous materials subjected to triaxial loading conditions

Résumé

This work proposes an analysis of the effect of cyclic loading of elasto-plastic porous materials upon the microstructure evolution and possible failure of the material due to low cycle fatigue. In order to investigate this effect, periodic FEM unit-cell calculations are carried out subjected to various stress triaxialities and Lode angles. The present results indicate that the absolute value of the stress triaxiality as well as of the value of the Lode angle are critical for the microstructure evolution and the subsequent material response. In addition, even though the macroscopic applied strains are relatively small, i.e., in the order of a few per cent, the local strains obtained near the pore surface can increase significantly (even more than 100%) due to significant localization of the deformation. This in turn leads to a critical evolution of the pore shape and as a consequence to porosity evolution.
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Dates et versions

hal-01717094 , version 1 (25-02-2018)

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Domaine public

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  • HAL Id : hal-01717094 , version 1

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Armel Mbiakop, Andreea Carpiuc, Andrei Constantinescu, Kostas Danas. Cyclic behavior of elasto-plastic porous materials subjected to triaxial loading conditions. 11e colloque national en calcul des structures, CSMA, May 2013, Giens, France. ⟨hal-01717094⟩
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