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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 paper, the authors compile 347 focal mechanism data from the Global/Harvard CMT catalogue and various other sources and grouped 332 of them in 24 distinct regions (boxes) on the basis of their geographical proximity, kinematic homogeneity and tectonic setting.
255 citations
TL;DR: In this paper, an analysis of fault slip data sets, in particular from Quaternary formations, provides evidence for a recent change of the stress field, which corresponds to the end of accretion processes that had prevailed since the Middle-Late Miocene.
253 citations
01 Sep 1953
TL;DR: In this paper, a general method is given, by which problems of elastic plane strain in a bimetallic medium can be reduced to standard problems of potential theory, where the elastic constants are different on either side of a plane, and the boundary between the two semi-infinite solids can be either a complete weld or it can transmit direct stress but not shear stresses.
Abstract: A general method is given, by which problems of elastic plane strain in a bimetallic medium can be reduced to standard problems of potential theory. A bimetallic medium is one where the elastic constants are different on either side of a plane. The boundary between the two semi-infinite solids can be either a complete weld, or it can transmit direct stress but not shear stresses. A special case is a semi-infinite solid with a free surface. Specific examples considered are (i) an edge dislocation in a semi-infinite solid with a free surface, (ii) an edge dislocation in a bimetallic solid for both types of boundary. In neither case can the stress field be given a simple interpretation in terms of images. However, the stress tending to move the dislocation is the same as that of a dislocation of suitable strength at the image point.
253 citations
TL;DR: In this paper, a model for brittle failure under compressive loading with an explicit accounting of micro-crack interactions is developed for the case of uniaxial compression under constant strain rate loading, and the model provides a natural prediction of a peak stress (defined as the compressive strength of the material) and also of a transition strain rate.
Abstract: A model is developed for brittle failure under compressive loading with an explicit accounting of micro-crack interactions. The model incorporates a pre-existing flaw distribution in the material. The macroscopic inelastic deformation is assumed to be due to the nucleation and growth of tensile “wing” micro-cracks associated with frictional sliding on these flaws. Interactions among the cracks are modeled by means of a crack-matrix-effective-medium approach in which each crack experiences a stress field different from that acting on isolated cracks. This yields an effective stress intensity factor at the crack tips which is utilized in the formulation of the crack growth dynamics. Load-induced damage in the material is defined in terms of a scalar crack density parameter, the evolution of which is a function of the existing flaw distribution and the crack growth dynamics. This methodology is applied for the case of uniaxial compression under constant strain rate loading. The model provides a natural prediction of a peak stress (defined as the compressive strength of the material) and also of a transition strain rate, beyond which the compressive strength increases dramatically with the imposed strain rate. The influences of the crack growth dynamics, the initial flaw distribution, and the imposed strain rate on the constitutive response and the damage evolution are studied. It is shown that different characteristics of the flaw distribution are dominant at different imposed strain rates: at low rates the spread of the distribution is critical, while at high strain rates the total flaw density is critical.
248 citations
TL;DR: In this article, the authors modeled the scratch adhesion test as a combination of an indentation stress field, a frictional stress field and residual (internal) stress present in the coating.
248 citations