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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, two-dimensional dynamic simulations of normal and nonvertical dip-slip faults were used to investigate the effect of the free surface on the dynamics of fault rupture and slip.
Abstract: Dynamic models of earthquake rupture and slip are a powerful method by which to investigate the physics of earthquakes. Owing to both conceptual and computational constraints, dynamic earthquake models have largely been limited to cases with geometrical symmetry, such as faults in unbounded media or vertical faults. However, there are both observational and theoretical reasons to believe that nonvertical dip-slip faults behave differently from faults with more symmetrical geometries. Previous observations have shown greater ground motion from thrust/reverse faults than normal faults and higher ground motion on hanging walls than on footwalls. In the present work, two-dimensional dynamic simulations of thrust/reverse and normal earthquakes show precisely these effects and also elucidate their causes. For typical nonvertical dip-slip faults the breakdown of symmetry with respect to the free surface allows radiated seismic waves to reflect off the free surface and to hit the fault again, altering the stress field on the fault. This process can lead to time-dependent normal stress and a feedback between the friction/rupture processes and seismic radiation. This interaction leads to thrust/reverse faults producing much higher fault and ground motion than normal faults with the same geometry and stress magnitudes. The asymmetric geometry also directly leads to higher motion on the hanging walls of such faults than on the footwalls. Simulations show that these effects occur for a variety of dip angles but only for faults that either intersect or closely approach the free surface. The results emphasize the strong effect that the free surface can have on the dynamics of fault rupture and slip.

73 citations

Journal ArticleDOI
TL;DR: Sperner et al. as discussed by the authors analyzed the deformation pattern along the southwestern margin of the Central European Basin System (CEBS) where Upper Carboniferous-Mesozoic rocks are uplifted due to the Late Cretaceous basin inversion.

73 citations

Journal ArticleDOI
TL;DR: The Australian Stress Map (ASM) as mentioned in this paper is a large-scale data set for the analysis of the present-day crustal stress pattern of the Australian continent, including the orientation of S Hmax (S Hmax) in continental Australia.

73 citations

Journal ArticleDOI
TL;DR: In this paper, the dynamic behavior of two collinear symmetric interface cracks between two dissimilar magneto-electro-elastic material half planes under the harmonic anti-plane shear waves loading is investigated by Schmidt method.
Abstract: In this paper, the dynamic behavior of two collinear symmetric interface cracks between two dissimilar magneto-electro-elastic material half planes under the harmonic anti-plane shear waves loading is investigated by Schmidt method. By using the Fourier transform, the problem can be solved with a set of triple integral equations in which the unknown variable is the jump of the displacements across the crack surfaces. To solve the triple integral equations, the jump of the displacements across the crack surface is expanded in a series of Jacobi polynomials. Numerical solutions of the stress intensity factor, the electric displacement intensity factor and the magnetic flux intensity factor are given. The relations among the electric filed, the magnetic flux field and the stress field are obtained.

73 citations

Journal ArticleDOI
TL;DR: In this paper, the essentials of the stress field in elastic and inelastic spheres and also in elastic circular discs under compression and impact are discussed and the problem of wave induced cracks is investigated experimentally.

73 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023245
2022517
2021392
2020416
2019410
2018388