Results 131 to 140 of about 2,684,787 (187)

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
openaire   +2 more sources

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
openaire   +1 more source

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
openaire   +1 more source

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.
openaire   +2 more sources

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 ...
openaire   +1 more source

Criteria for Elastic Fracture

2012
Criteria for the growth of a pre-existing crack as generally based on reaching critical values of the stress intensity factors or energy release rate. Starting with the simplest case, that of tensile fracture in an elastic material, criteria for fracture under a range of conditions are explored.
openaire   +1 more source

Criteria for Treating Open Fractures

2002
The incidence of severe lower leg trauma seems to be increasing in high-level trauma centres. This is probably due to the widespread use of automobile crash protection systems that mainly protect the upper body and head, but leave the lower part of the legs unprotected.
E. J. Müller, G. Muhr
openaire   +1 more source

Fracture Criteria on Peeling

1980
The mechanical conditions for the initiation and the propagation of fracture are considered in the case of trousers type of a specimen consisting of two flexible canvas bonded with rubbery adhesive. To reduce the difficulties in mathematical analysis a mechanical model for peeling is adopted.
openaire   +1 more source

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.
openaire   +1 more source

Dynamic fracture criteria for a polycarbonate

Journal of Applied Physics, 1973
Flat-plate impact experiments were performed on polycarbonate specimens to produce various levels of fracture damage. Nucleation and growth functions for incipient shock damage were deduced from the observed damage and from measured and computed stress histories.
D. R. Curran, D. A. Shockey, L. Seaman
openaire   +1 more source