Changes in in situ ultrasonic properties of rock on strain relaxation

T. Engelder, R. Plumb

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


In situ and laboratory measurements of ultrasonic velocity have been compared to test for the effect of strain relaxation on rock properties. For granites, the larger changes in compressional-wave velocity (Vp) correlate with higher in situ stresses, the maximum Vp being parallel to the directory of maximum compressive stress. For sedimentary rocks, the relation between changes in Vp and in-situ stress is dependent on lithology. In sandstone, the direction associated with the maximum decrease in Vp accompanying strain relaxation is parallel to the maximum compressive stress. Limestone is virtually isotropic with little decrease in Vp on strain relaxation.

Original languageEnglish (US)
Pages (from-to)75-82
Number of pages8
JournalInternational Journal of Rock Mechanics and Mining Sciences and
Issue number2
StatePublished - Apr 1984

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • General Engineering


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