Articles | Volume 62
05 Oct 2023
 | 05 Oct 2023

Rate-dependence of the compressive and tensile strength of granites

Jackie E. Kendrick, Anthony Lamur, Julien Mouli-Castillo, Andrew P. Fraser-Harris, Alexander Lightbody, Katriona Edlmann, Christopher McDermott, and Zoe Shipton

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Cited articles

Alatorre-Ibargüengoitia, M. A., Scheu, B., Dingwell, D. B., Delgado-Granados, H., and Taddeucci, J.: Energy consumption by magmatic fragmentation and pyroclast ejection during Vulcanian eruptions, Earth Planet. Sci. Lett., 291, 60–69,, 2010. 
Alneasan, M., Behnia, M., and Alzo'ubi, A. K.: Experimental observations on the effect of strain rate on rock tensile fracturing, Int. J. Rock Mech. Min., 160, 105256,, 2022. 
Ashby, M. F., and Sammis, C. G.: The damage mechanics of brittle solids in compression, Pure Appl. Geophys., 133, 489–521,, 1990. 
ASTM: D3967-08, Standard test method for splitting tensile strength of intact rock core specimens., ASTM International, West Conshohocken, USA,, 2008. 
ASTM: D7012-14e1, Standard Test Methods for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and Temperatures, ASTM International, West Conshohocken, USA,, 2014. 
Short summary
By testing the strength of granite in compression and tension at a range of deformation rates, we found that the strength increases with faster deformation. This observation highlights that at these rates, relevant for example to geothermal exploration, we have to consider how the rate of deformation impacts the energy released when rocks crack. The results are promising for developing safe procedures for extracting resources from the subsurface.