Stress path testing of an anisotropic sandstone

William Dehler, Joseph F Labuz

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


The Berea sandstone used in this study is transversely isotropic with respect to elastic response, with P-wave velocities of 2,160 m/s normal to bedding and 2,290 m/s parallel to bedding, a variation of only 6%. Triaxial compression and extension tests involving failure by loading and unloading were performed along the two directions of symmetry. With axial stress applied parallel to bedding, the internal friction angle was approximately 55° for compression and extension, indicating no intermediate stress effect for the linear Mohr-Coulomb criterion. However, for axial stress normal to bedding, the friction angle in compression was 50°, whereas in extension it was 44°. This anomalous behavior was attributed to strength anisotropy of the sandstone.

Original languageEnglish (US)
Pages (from-to)116-119
Number of pages4
JournalJournal of Geotechnical and Geoenvironmental Engineering
Issue number1
StatePublished - Jan 1 2007


  • Anisotropy
  • Sandstone
  • Shear strength
  • Triaxial tests


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