Strathprints Home | Open Access | Browse | Search | User area | Copyright | Help | Library Home | SUPrimo

Micromechanical analysis of kinematic hardening in natural clay

Yin, Zhen-Yu and Chang, Ching and Hicher, Pierre-Yves and Karstunen, M. and , Helsinki University of technology and , University of Massachusetts and , Ecole Centrale de nates and , University of Strathclyde and , Academy of Finland (Grant 210744) (Funder) and , EC MRTN-CT-2004-512120 (Funder) (2009) Micromechanical analysis of kinematic hardening in natural clay. International Journal of Plasticity, 25 (8). pp. 1413-1435. ISSN 0749-6419

[img]
Preview
PDF (strathprints013495.pdf)
Download (1797Kb) | Preview

    Abstract

    This paper presents a micromechanical analysis of the macroscopic behaviour of natural clay. A microstructural stress-strain model for clayey material has been developed which considers clay as a collection of clusters. The deformation of a representative volume of the material is generated by mobilizing and compressing all the clusters along their contact planes. Numerical simulations of multistage drained triaxial stress paths on Otaniemi clay have been performed and compared the numerical results to the experimental ones in order to validate the modelling approach. Then, the numerical results obtained at the microscopic level were analysed in order to explain the induced anisotropy observed in the clay behaviour at the macroscopic level. The evolution of the state variables at each contact plane during loading can explain the changes in shape and position in the stress space of the yield surface at the macroscopic level, as well as the rotation of the axes of anisotropy of the material.

    Item type: Article
    ID code: 13495
    Keywords: microstructures, yield condition, anisotropic material, constitutive behaviour, elastic–plastic material, civil engineering, Engineering (General). Civil engineering (General)
    Subjects: Technology > Engineering (General). Civil engineering (General)
    Department: Faculty of Engineering > Civil and Environmental Engineering
    Related URLs:
      Depositing user: Dr Minna Karstunen
      Date Deposited: 19 Nov 2009 16:26
      Last modified: 25 Apr 2012 16:53
      URI: http://strathprints.strath.ac.uk/id/eprint/13495

      Actions (login required)

      View Item

      Fulltext Downloads: