نتایج جستجو برای: strain based criteria
تعداد نتایج: 3286010 فیلتر نتایج به سال:
background: objective: to determine whether different diagnostic criteria of gestational diabetes mellitus (gdm) are suitable for iranian population. materials and methods: prospective study was performed on 617 pregnant women. 1804 subjects referred for 50 g glucose challenge test (gct) between 24th and 28 th weeks of gestation. 617 women with abnormal gct (blood glucose ≥130 mg/dl) underw...
Numerical methods such as boundary element and finite element methods are widely used for the stress analysis in solid mechanics. This study presents boundary element method based on the displacement discontinuity formulation to solve general problems of interaction between hydraulic fracturing and discontinuities. The crack tip element and a higher order boundary displacement collocation techn...
In the context of ambient networks where each small device must trust its neighborhood rather than a fixed network, we propose in this paper a \textit{trust management framework} inspired by known social patterns and based on the following statements: each mobile constructs itself a local level of trust what means that it does not accept recommendation by other peers, and the only relevant para...
Fungal diseases are currently a serious public health problem, due to the limited number of really effective principles, and the emergence of resistant strains to the polyenic antifungals. The aim of this study was to screen, for non-polyenic antifungals production by Actinobacteria, and to validate the screening program by characterizing the produced compounds. Actinobacteria isolates were tes...
in classical mechanics, considering hook’s law stress is a linear function of strain. while in strain gradient theory stress is a function of strain and strain differentials. in this paper, novel formulation relating stress and strain and also new boundary conditions are derived based on minimum potential energy principle. in strain gradient theory a length coefficient parameter is defined. thi...
• A constitutive material model is developed to nonlinear behaviour of timber. Orthotropic stress–strain relationship used in the linear elastic phase. Under compression a based on Hoffman yield criterion and plastic potential used. Isotropic strain hardening during deformation incorporated into criterion. Tensile damages all three grain directions are established using damage factors fracture ...
Construction of railway track embankment over a soft subgrade will bring the necessity of using soil improvement methods for bearing capacity and settlement criteria satisfaction. As a practical improvement method, railway embankment filled with geofoam blocks is studied in this paper. First; a bilinear stress-strain model developed in FLAC2D to simulate geofoam embankment behavioral model. Sec...
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