A NEW MECHANICAL QUANTITY FOR SOILS AND ITS APPLICATION TO ELASTOPLASTIC CONSTITUTIVE MODELS

This paper presents a method to extend an elastoplastic constitutive model valid only in the triaxial compression condition to one applicable in general stress conditions. A stress-strain model in three-dimensional stresses was developed on the basis of the extended concept of the "spatial mobilized plane" (SMP). From reconsideration of the concept of SMP, a mechanical quantity to describe uniquely the bahavior of soils subjected to three-dimensional stresses is obtained. This mechanical quantity is a symmetrical tensor whose each principal value is the product of the corresponding principal stress and the corresponding direction cosine of the SMP. The mechanical quantity is then applied to the cam-clay model as an example. It is checked by various data of drained and undrained shear tests on normally consolidated clay so that the modified cam-clay model proposed here describes uniquely the behavior of soils not only under the triaxial compression condition but also under triaxial extention and three different principal stress conditions. Although only the application of this mechanical quantity to the cam-clay model is shown in this paper, it is easily applicable to any other elastoplastic constitutive model for soils. (TRRL)

  • Availability:
  • Corporate Authors:

    Japanese Society of Soil Mech & Foundation Engrs

    Tokyo,   Japan 
  • Authors:
    • NAKAI, T
    • Mihara, Y
  • Publication Date: 1984-6

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 82-94
  • Serial:
    • SOILS AND FOUNDATIONS
    • Volume: 24
    • Issue Number: 2
    • Publisher: JAPANESE GEOTECHNICAL SOCIETY
    • ISSN: 0038-0806

Subject/Index Terms

Filing Info

  • Accession Number: 00391234
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Dec 30 1984 12:00AM