Results 251 to 260 of about 370,108 (311)

A note on fracture criteria for interface fracture

International Journal of Fracture, 2000
Several criteria for interface fracture are examined and compared to test results obtained from glass/epoxy specimens. These include two energy release rate criteria, a critical hoop stress criterion and a critical shear stress criterion. In addition, approximate plastic zone size and shape within the epoxy are determined for these tests.
Leslie Banks-Sills, Dana Ashkenazi
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Criteria for Failure and Fracture

2020
Structural members may have geometric features (including holes, notches, and corners) that result in localized regions of high stress called stress concentrations. The ratio C of the maximum stress resulting from a stress concentration to a defined nominal stress is called the stress concentration factor.
Anthony Bedford, Kenneth M. Liechti
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The impact of subtrochanteric fracture criteria on hip fracture classification

Osteoporosis International, 2011
Hospital diagnosis codes are useful for assessing hip fracture rates in large populations. However, these codes do not reliably differentiate hip fractures that occur in the subtrochanteric region. Identification of subtrochanteric fractures requires review of radiographic images to distinguish these fractures from the more commonly occurring ...
S Y, Huang, C D, Grimsrud, J, Provus, M, Hararah, M, Chandra, B, Ettinger, J C, Lo   +6 more
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Criteria for brittle fracture in compression

Engineering Fracture Mechanics, 1990
Abstract Fracture nucleation and propagation in the compressive stress field of the geological and the mining environment is considered with the purpose of formulating an empirical, but general fracture criterion that is in agreement with experimental evidence. Present fracture criteria are inadequate for compressive loading.
E.Z. Lajtai, B.J. Carter, M.L. Ayari
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Rock Fracture Criteria

2010
When stresses in the Earth’s crust exceed the crustal strength, the rock fractures and fails (Brace 1964; Hoek 1968; Obert 1972). A fracture criterion describes the conditions for which failure occurs in a material. In principle, one distinguishes between phenomenological and mechanistic failure theories.
Arno Zang, Ove Stephansson
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Fracture criteria for materials with defects

Journal of Applied Mathematics and Mechanics, 1987
Abstract Classical theories of the strength of materials start from concepts of the existence and uniqueness of fracture surfaces in the space of indpendent loading parameters: on approaching a certain point of this surface from within along any arbitrary loading path, the instant of fracture is fixed by the very same combination of loading ...
Germanovich, L. N., Cherepanov, G. P.
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On material fracture criteria

Technical Physics, 2017
Based on the nonlinear mechanics of material fracture, a model of the fracture of materials with actual (discrete) structures has been constructed. The model is supported by proofs that crack resistance K 1c and fracture toughness G 1c
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The mixed mode brittle fracture criteria in siliding mode fracture

Applied Mathematics and Mechanics, 1985
It is well-known that the present mixed mode brittle fracture criteria are all the opening mode fracture criterion. We consider that mixed mode brittle fracture of sliding mode fracture exists too. Hence we propose three criteria of mixed mode brittle fracture of sliding mode fracture;: the radial shearing stress criterion, the maximum shearing stress ...
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Stability Criteria for Nonoperative Ankle Fracture Management

Foot & Ankle International, 2011
Background: This study was designed to see if stability based criteria are useful in choosing between nonoperative and operative treatment of ankle fractures. Materials and Methods: One hundred sixty ankle fractures in skeletally mature patients were retrospectively analyzed to obtain an epidemiological profile in a population of about 130,000.
Pakarinen Harri Juhani, Ristiniemi Jukka, Ohtonen Pasi Petteri, Flinkkilä Tapio   +3 more
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Fracture Criteria for Brittle Materials

Journal of Testing and Evaluation, 1976
Abstract The behavior of brittle materials under biaxial and triaxial loading is predictable on the basis of stress envelopes derived from the properties of idealized materials. In the case of nonmetallic brittle materials, the idealized patterns must be somewhat modified to allow for the low tensile strength of these materials.
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