On slow wave process in rocks

International Scientific Conference of Young Scientists: Advanced Materials in Construction and Engineering

材料科学;土木建筑工程;工业技术

Zuev, L.B.^1,2 ; Barannikova, S.A.^1,2,3 ; Nadezhkin, M.V.^1,4

Institute of Strength Physics and Materials Science, SB RAS, Tomsk

634021, Russia^1

National Research Tomsk State University, Tomsk

634050, Russia^2

Tomsk State University of Architecture and Building, Tomsk

634003, Russia^3

National Research Tomsk Polytechnic University, Tomsk

634050, Russia^4

关键词: Deformation and fracture;    Earth crusts;    Localized plasticity;    Micromechanisms;    Propagation rate;    Slow motion;    Slow wave;    Speckle photography technique;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/71/1/012074/pdf
DOI  :  10.1088/1757-899X/71/1/012074

来源: IOP

【 摘 要 】

A study was made of the general regularities of localized plasticity development in deforming rocks. The potential usefulness of speckle photography techniques in applications to problems of deformation and fracture in rocks was explored and circumscribed. The evolution of localized plasticity in rocks was addressed using wave ideas. The tests were performed for the compression samples of marble, silvinite and sandstone; the deformation occurred in these materials via different micromechanisms of plasticity. By the deformation, autowaves would form in the compression samples of rocks. The autowave propagation rates are in the range ∼10-510-4m/s (0.33 km/yr), which is close to slow motion rates observed in the earth crust after an earthquake or a rockslide. A correlation has been established between the calculated and experimental data on the time and coordinates of fracture in rocks.