Constitutive formulation, localization and failure analysis of porous materials like concrete subjected to high temperatura
In this work, a thermodynamically consistent non-local poroplastic constitutive theoryfor quasi-brittle materials like concrete subjected to high temperature is presented [1]. Thereby, gradient poroplasticity and fracture energy-based homogenization are combined to describe the post peak behavior o...
Guardado en:
| Autores principales: | , , , |
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| Formato: | Documento de conferencia |
| Lenguaje: | Inglés |
| Publicado: |
International Amusement Manufacturing Company
2022
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| Materias: | |
| Acceso en línea: | http://repositorio.unne.edu.ar/handle/123456789/50486 |
| Aporte de: |
| Sumario: | In this work, a thermodynamically consistent non-local poroplastic constitutive theoryfor quasi-brittle materials like concrete subjected to high temperature is presented [1].
Thereby, gradient poroplasticity and fracture energy-based homogenization are combined to describe the post peak behavior of porous media when subjected to long term exposure of temperature. The proposed couple thermo-mechanical material formulation is able to predict the strong variation of sti_ness, strength and ductility of a porous material like concrete in terms of the acting temperature and con_ning pressure. To this end, a temperature dependent maximum strength criterion, and hardening and softening laws are de_ned. The last includes two characteristic lengths describing the non local gradient and fracture energy-based dissipations, respectively, in the post-peak regime. |
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