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Stress field
About: Stress field is a research topic. Over the lifetime, 11926 publications have been published within this topic receiving 226417 citations.
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TL;DR: In this article, a closed-form solution for the stress field induced by gravity in anisotropic rock masses is presented, which is constrained by the thermodynamic requirement that strain energy be positive definite, giving the following important result: inclusion of anisotropy broadens the range of permissible values of gravity induced horizontal stresses.
123 citations
TL;DR: In this article, a study of focal mechanisms of earthquakes and stress indicators for Portugal and its adjacent Atlantic margins is presented for NNW-SSE direction with a greater proportion of strike-slip and reverse-oblique mechanisms for the whole area.
123 citations
TL;DR: In this article, the authors proposed a three-point method for determining orientations and locations of planes along which the micro-earthquakes occurred, and applied it to four hydraulic fracturing experiments conducted at Fenton Hill as part of a hot dry rock geothermal energy project.
122 citations
TL;DR: Yoshida et al. as mentioned in this paper estimated the stress fields in inland areas of eastern Japan before and after the 2011 Tohoku-oki earthquake by inverting focal mechanism data, and they found that the stress field did not change in central and south-central Japan after the earthquake.
Abstract: [1] Stress fields in inland areas of eastern Japan before and after the Tohoku-oki earthquake were estimated by inverting focal mechanism data. Before the earthquake, s1 axis was oriented EW in Tohoku but NW-SE in Kanto-Chubu. The stress fields changed after the earthquake in northern Tohoku and in southeastern Tohoku near Iwaki city, where the orientations of the principal stresses became approximately the same as the orientations of the static stress change associated with the earthquake. This indicates that differential stress magnitudes in these areas before the earthquake were smaller than 1 MPa. The stress field did not change in central Tohoku, even though the stresses loaded after the earthquake had nearly reversed orientations, which indicates that the differential stress magnitudes there were significantly larger than 1 MPa. In Kanto-Chubu, stresses having nearly the same orientations as the background stresses were loaded after the earthquake, and the stress fields did not change as expected. This may have caused very high induced seismicities in Kanto-Chubu. Citation: Yoshida, K., A. Hasegawa, T. Okada, T. Iinuma, Y. Ito, and Y. Asano (2012), Stress before and after the 2011 great Tohoku-oki earthquake and induced earthquakes in inland areas of eastern Japan, Geophys. Res. Lett., 39, L03302,
122 citations
TL;DR: In this article, the direction of fracture initiation for in-plane shear load was found to be away from the line that bisects the notch, and the fracture angle decreases from ± 70.5° to ± 52.0° as the half notch angle is increased from 0° to 60°.
122 citations