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Modeling of Weathered and Moisture Sensitive Granular Materials

  • Erich BauerEmail author
  • Zhongzhi Fu
Conference paper
Part of the Springer Series in Geomechanics and Geoengineering book series (SSGG, volume 11)

Abstract

The focus of this paper is on modeling the essential mechanical properties of weathered and moisture sensitive granular materials under dry and water saturated conditions using a state dependent solid hardness. Herein the solid hardness is related to the grain assembly in the sense of a continuum description and does not mean the hardness of an individual grain. Particular attention is paid to creep deformation initiated by water saturation of an initially dry material. First the constitutive model is outlined for isotropic loading paths. For general stress paths the influence of the stress deviator on creep deformation and stress relaxation is investigated with an extended hypoplastic model. The performance of the refined model is demonstrated for triaxial compression tests where the saturation of the material is investigated for different deviator stresses. The predictions of the model are compared with experiments.

Keywords

Weathered granular materials Solid hardness Creep Hypoplasticity 

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.Institute of Applied MechanicsGraz University of TechnologyGrazAustria
  2. 2.Institute of Hydraulic EngineeringHohai UniversityNanjingChina

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