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Fracture-induced Q-anisotropy: Inversion for fracture parameters
SEG Technical Program Expanded Abstracts 2013, 2013Aligned vertical fractures are common in the Earth’s crust due to tectonic stresses and/or hydraulic fracturing. These fractures lead to azimuthally varying velocities and attenuations of P-, SVand SH-waves. We have extended Schoenberg’s elastic linear slip model of fractured medium to anelastic case.
Tatiana Chichinina +2 more
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The Influence of the Interface on Fracture Parameters
2009The presence of cracks has a major impact on the reliability of advanced materials, like fiber or particle reinforced ceramic composites, and laminated ceramics. The understanding of the failure mechanisms is very important, as much as the estimation of fracture parameters at the tip of the crack approaching an interface.
L. Marsavina, T. Sadowski
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Estimates of fracture parameters of earthquakes
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1984A new estimate of the fracture parameters of earthquakes is provided in this paper. By theMuskhelishvili method (1953) a number of basic relations among fracture-mechanics parameters are derived. A scheme is proposed to evaluate the slip weakening parameters in terms of fault dimension, average slip, and rise time, and the new results are applied to 49
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Isolated fibular stress fractures: Radiographic parameters
Foot and Ankle Surgery, 2020Fibular stress fractures are uncommon injuries with an incompletely understood pathogenesis and predisposing characteristics. This study investigated the demographic and radiographic risk factors for fibular stress fractures.A retrospective chart review from 2010 to 2018 revealed thirteen patients with isolated fibular stress fractures.
Nana O. Sarpong +5 more
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Determination of Fracture Parameters
2017Numerical methods for determining fracture mechanics parameters or “crack-driving forces” like J-integral or energy release rate and stress intensity factors by finite element analyses are presented and explained. Special emphasis is placed on the capabilities of the finite element code ABAQUS.
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Fracture toughness parameter in a pipeline
Engineering Fracture Mechanics, 1992Abstract This paper discusses the problem of determining the characteristic values in ductile fracture mechanics on the basis of the fracture toughness, K Ic , for a double-sided spiral submerged arc weld pipeline material. Special interest was directed towards relatively thin ready-to-use pipes of the hot rolled steel API 5L-X52.
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Fracture Parameters on Three-Dimensional Sliding Mode Fracture
Key Engineering Materials, 2007In the recent years three-dimensional (3D) elastic-plastic analyses have been conducted extensively for the opening mode (mode I) fracture and the constraint effects are discussed in detail. However less work is focused on other modes as sliding mode (mode II), tearing mode (mode III) or the mixed mode fracture in three-dimensional.
Fei Xu, Yu Long Li, Wan Lin Guo
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Reservoir Parameters Inversion Based on Fracturing Operation Parameters
International Petroleum Technology Conference, 2013Abstract Reservoir parameters can be accurately obtained by well test. However, well test is a cumbersome process with a long time period and induces some influences on the oil field production. Though small-scale fracturing test can also acquire reservoirs and fracturing fracture parameters, it is not be realistic ...
Jing-Hong Hu, Yong Zhao, Lei Wang, Da Li
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SPE Annual Technical Conference and Exhibition, 1988
ABSTRACTThis paper proposes modifications to test procedures, currently in use in the industry, and presents techniques for design and analysis of hydraulic fracture tests. The proposed approach is used for an accurate determination of the fracture overpressure and the total leak-off coefficient which are necessary for the overpressure calibrated ...
J. Shlyapobersky +3 more
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ABSTRACTThis paper proposes modifications to test procedures, currently in use in the industry, and presents techniques for design and analysis of hydraulic fracture tests. The proposed approach is used for an accurate determination of the fracture overpressure and the total leak-off coefficient which are necessary for the overpressure calibrated ...
J. Shlyapobersky +3 more
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On Evaluation of Fracture Parameters in Statistical Fracture Mechanics
1995Statistical fracture mechanics includes models of both instantaneous and slow crack growth. The instantaneous crack growth models yield criteria of crack instability, the slow crack growth models result in probabilistic estimates of times to failure. A short reference to models both types is presented below.
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