Defining yield from bender element measurements in triaxial stress probe experiments

Young Hoon Jung*, Wanjei Cho, Richard J. Finno

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


This paper describes the elastic response of a block sample of compressible Chicago glacial clay under a variety of stresses and its relationship with the deformation characteristics at relatively large strains. The elastic shear stiffness was obtained from bender element tests during consolidation and shearing in drained triaxial stress probe tests. An empirical correlation was established based on the elastic shear stiffness in a preyield condition. By comparing the empirical correlation with the measured elastic shear stiffness in the stress region during probing, the changes of elastic shear stiffness were investigated. The departure of elastic shear stiffness from values computed by the empirical relation based on K0 loading directly relates to the yielding characteristics of the clay. The large-scale change of soil structure at yielding alters the well-established relationship between the elastic shear stiffness and stresses in the preyield condition. The mechanical yielding response of clays can be detected based on the systematic analysis of the elastic shear wave velocities.

Original languageEnglish (US)
Pages (from-to)841-849
Number of pages9
JournalJournal of Geotechnical and Geoenvironmental Engineering
Issue number7
StatePublished - Jul 2007


  • Clays
  • Elasticity
  • Shear modulus
  • Wave measurement
  • Yields

ASJC Scopus subject areas

  • General Environmental Science
  • Geotechnical Engineering and Engineering Geology


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