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A thermo-plastic/viscoplastic damage model for geomaterials

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2011
auteur(s) Zhou Hui; Hu Dawei; Zhang Fan; Shao Jian-Fu
journal (abréviation) Acta Mechanica Solida Sinica (Acta Mechanica Solida Sinica)
volume (numéro) 24 (3)
  
pages 195 – 208
résumé A thermo-plastic/viscoplastic damage coupled model was formulated to describe the time independent and time dependent behaviors of geomaterials under temperature effect. The plastic strain was divided into instantaneous plastic strain and creep plastic strain. To take temperature effect into account, a temperature variable was introduced into the instantaneous and creep plastic behavior descriptions and damage characterization, and a linear thermal expansion law was used in constitutive equation formulation. According to the mechanical behavior of rock salt, a specific model was proposed based on the previous model and applied to Avery rock salt, in which the numerical results obtained from our model had a good agreement with the data from experiments.
mots clés thermo-plastic/viscoplastic damage coupled; mechanical model; geomaterial; rock salt
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