Laser Ultrasonic Diagnostics And Acoustic Emission Technique For Examination Of Rock Specimens Under Uniaxial Compression

• Main Authors: Cherepetskaya, Elena B., Makarov, Vladimir A., Morozov, Dmitry V., Sas, Ivan E.
• Format: Text
• Language: English
• Published: Zenodo 2016
• Subjects: Acoustic emission; geomaterial; laser ultrasound; uniaxial compression.; Meredith; Kamchatka
• Online Access: https://dx.doi.org/10.5281/zenodo.1126936; https://zenodo.org/record/1126936

Laboratory studies of the stress-strain behavior of rocks specimens were conducted by using acoustic emission and laser-ultrasonic diagnostics. The sensitivity of the techniques allowed changes in the internal structure of the specimens under uniaxial compressive load to be examined at micro- and macro scales. It was shown that microcracks appear in geologic materials when the stress level reaches about 50% of breaking strength. Also, the characteristic stress of the main crack formation was registered in the process of single-stage compression of rocks. On the base of laser-ultrasonic echoscopy, 2D visualization of the internal structure of rocky soil specimens was realized, and the microcracks arising during uniaxial compression were registered. : {"references": ["Brantut, N., Heap, M. J., Meredith, P. G., & Baud, P. (2013). Time-dependent cracking and brittle creep in crustal rocks: A review. Journal of Structural Geology, 52, 17-43", "Duncan C. Wyllie. Rock Fall Engineering. CRC Press, 2014, p. 270", "Fusao O., Akira M., Ryosuke U., Sayuri K. Computer Methods and Recent Advances in Geomechanics. CRC Press, 2014, p. 472", "The Japanese Society for Non-Destructive Inspection. Practical Acoustic Emission Testing. Springer, 2016, p. 130", "Xue, L., Qin, S., Sun, Q., Wang, Y., Min Lee, L., Li, W., 2014. A study on crack damage stress thresholds of different rock types based on uniaxial compression tests. Rock Mech. Rock. Eng. 47, 1183\u20131195.", "Aker, E., K\u00fchn, D., Vavry\u00e8uk, V., Soldal, M., Oye, V., Experimental investigation of acoustic emissions and their moment tensors in rock during failure. International Journal of Rock Mechanics & Mining Sciences, 70 (2014) 286-295.", "A.A. Karabutov, E.B. Cherepetskaya, Y.G. Sokolovskaya, D.V. Morozov, Study of Effects of Weathering Factors on Internal Structure of Rocks by Laser Ultrasonic Spectroscopy. Applied Mechanics and Materials, vol.843(2016), P.51-58.", "A. A. Karabutov, N. B. Podymova, E. B. Cherepetskaya Measuring the Dependence of the local Young's Modulus of isotropic Composite Materials by a pulsed acoustic Method using a Laser Source of Ultrasound, Journal of Applied Mechanics and Technical Physics, Vol. 54, No.3, pp. 500\u2013507, 2013", "Ariskin A.A. and Barmina G.S. Modeling Phase Equilibriums at Crystallization of Basalt Magmas, Moscow, Nauka, MAIK Nauka/Interpreriodika, 2000 (in Russian)\n[10]\tBortnikova S.B., Sharapov V.N., and Bessonova E.P. Geochemical Composition of Thermal Springs in the Donnoye Fumarole Field near the Mutnovsky Volcano, South Kamchatka, and Problems of Relating them to Above-Critical Magmatic Fluids, Dokl. Akad. Nauk, 2007, Vol. 413, No. 4, pp. 530-534\n[11]\tMartynov Yu.A. Perepelov A.B., and Chashchin A.A. Geochemical Typification of the Basaltoids of the Mutnovsky Volcanic Field, South Kamchatka, Tikhookean. Geol., 1995, vol. 14, No.5, pp. 72--83\n[12]\tMartynov Yu.A. and Chashchin A.A. Rock-Forming Minerals of Basic Volcanic Rocks of the Mutnovsky Geothermal Area, in New Data on Petrology of Magmatic and Metamorphic Rocks of Kamchatka, Vladivostok, DVO Akad. Nauk, 1989, pp. 112--128\n[13]\tSelyangin O.B. New Data on the Mutnovsky Volcano: Structure, Evolution, and Prediction, Vulkanol. Seismol., 1993, No.1, pp. 17--35"]}