Published in Seismic Instruments
AbstractThe paper presents seismological, forecasting, and seismotectonic data on the strong March 25, 2020 earthquake in the Northern Kurils. The collected materials on an unusual deep lithospheric earthquake in the border area of the Northern Kurils and Southern Kamchatka made it possible to understand the structure of the source of this event, a...
Published in Open Engineering
In the paper the numerical analysis of the stress fields for 145Cr6 steel, near crack tip is presented, based on three-dimensional finite element method (FEM) analysis. The FEM analysis is focused on SEN(B) specimens with relative crack length a/W ≈ 0.30. In addition to the presentation of the normal components of the stress tensor, the paper prese...
Published in Geotectonics
Abstract—We briefly review the geological research of Professor He Gouqi (1956‒2017), renowned geologist of Peking University in China, author of more than 200 publications, who directed or was responsible for the execution of several major regional projects in China, such as Upper Mantle of the Earth’s Crust of Northern China, Project for Mineral ...
Published in Russian Metallurgy (Metally)
A model is developed to calculate the Hall–Petch relation parameters for the submicrocrystalline (SMC) metals fabricated by severe plastic deformation (SPD) methods. The model is based on the assumption that the flow stress in SMC metals includes both conventional contributions (caused by lattice dislocations, impurity atoms, etc.) and a contributi...
Published in Mathematical Modelling in Civil Engineering
The Fourier sine transform method was implemented in this study to obtain general solutions for stress and displacement fields in homogeneous, isotropic, linear elastic soil of semi-infinite extent subject to a point load applied tangentially at a point considered the origin of the half plane. The study adopted a stress based formulation of the ela...
Published in Geotectonics
In this work, we consider application of an original method for determining the indicators of the tectonic stress fields in the northern Baikit anteclise based on 3D seismic data for further reconstruction of the stress state parameters when analyzing structural maps of seismic horizons and corresponded faults. The stress state parameters are deter...
Published in Geotectonics
The contemporary structure of the West Sakhalin Terrane started to form in the Pleistocene and the process of its formation continues up to now in a setting of ENE (60°–90°) shortening. Evidence of the preceding NE (30°–45°) compression was revealed during the study. This compression prevailed in the Eocene–Pliocene. Under the settings of NE (30°–4...
Published in Moscow University Geology Bulletin
The theoretical fundamentals of the hypothesis are given about a stationary network of faults, which activate at different orientations of global and regional stresses and/or continent rotation in a stationary force field. It is shown that in a coarsely discrete fractal medium: (a) referencing of cracks and faults to the global, regional, and local...
Published in Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques
The results of the investigation of deformation fields in a special silicon triple-crystal X-ray interferometer unit under external stress by means of Moiré X-ray-diffraction patterns are presented. The values of the dislocation deformation and the components of the elastic deformation are calculated. It is shown that for a crystal containing dislo...
