The role of water in the dynamic mechanical behaviors of a granitic rock

H. Yang, G. L. Cai, Q. Zhao

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


Rock masses are frequently exposed to dynamic stress perturbations associated with natural events (e.g., earthquakes, landslides, and rock bursts) and engineering operations (e.g., blasting, explosion, and induced earthquakes). Understanding the dynamic mechanical characteristics of rock masses is essential to many geo-engineering applications such as underground excavation and hydrocarbon energy exploitation. Water is ubiquitous in the Earth's crust and plays a vital role in the dynamic mechanical behaviors of rock masses; hoever, the effects of water on the dynamic mechanical characteristics of rocks are still not fully understood. Therefore, it is necessary to carry out more dynamic tests to understand their mechanical responses to the presence of water. To this end, we conduct dynamic uniaxial compressive tests on dry and water-saturated granite rock samples via the split Hopkinson pressure bar (SHPB) technique. The test results demonstrate the strain rate dependence of dynamic mechanical properties of both dry and water-saturated granite rock specimens. The presence of water lowers the dynamic compressive strength and elastic modulus of granite rock specimens. The dynamic increase factor (DIF), characterizing the strain rate sensitivity of dynamic mechanical properties, for wet granite rock specimens is higher than that for dry ones over the tested strain rate range. These findings improve our understanding of the water effects on the dynamic mechanical behaviors of granite rocks.

Original languageEnglish
Title of host publication57th US Rock Mechanics/Geomechanics Symposium
PublisherAmerican Rock Mechanics Association (ARMA)
ISBN (Electronic)9780979497582
Publication statusPublished - 2023
Event57th US Rock Mechanics/Geomechanics Symposium - Atlanta, United States
Duration: 25 Jun 202328 Jun 2023

Publication series

Name57th US Rock Mechanics/Geomechanics Symposium


Conference57th US Rock Mechanics/Geomechanics Symposium
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics


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