Comments are made on a proposed ellipsoidal yield surface, and the use of the model to analyze the simple shear test. A point concerning the unloading situation is clarified, and general incremental stress-strain equations are given which may be used when the effective stress path reaches a specified point. The effective stress path moves through the successive volumetric yield surfaces until the critical state is reached. A general treatment of the undrained loading condition is possible in a general finite element program which is able to handle both imcompressibility constraints and nonsymmetric stress-strain relations. However, the problem can be considerably simplified, and closed form solutions may be obtained for simple problems, if it is assumed that both the recoverable and irrecoverable components of the volumetric strains are zero.

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Filing Info

  • Accession Number: 00141309
  • Record Type: Publication
  • Report/Paper Numbers: ASCE #11157 Proceeding
  • Files: TRIS
  • Created Date: Oct 26 1976 12:00AM