نتایج جستجو برای: bond stress model
تعداد نتایج: 2542477 فیلتر نتایج به سال:
NPGPx is a member of the glutathione peroxidase (GPx) family; however, it lacks GPx enzymatic activity due to the absence of a critical selenocysteine residue, rendering its function an enigma. Here, we show that NPGPx is a newly identified stress sensor that transmits oxidative stress signals by forming the disulfide bond between its Cys57 and Cys86 residues. This oxidized form of NPGPx binds ...
Some international standard regulate the use of the high strength concrete, which may not be adopted generally without consideration of the differences that can exist among the materials in different countries. This paper relate the results of an experimental study consisting of pull out tests of Brazilian’s steel, with five different concrete strength 20, 40, 60, 80 and 100 MPa, and three diff...
New methods are needed that can predict the clinical failure of dental restorations that primarily rely on dentin bonding. Existing methods have shortcomings, e.g. severe deviation in the actual stress distribution from theory and a large standard deviation in the measured bond strength. We introduce here a novel test specimen by examining an endodontic model for dentin bonding. Specifically, w...
BACKGROUND The objective of this study was to evaluate the effect of orthodontic bracket base shape on shear bond strength and adhesive remnant index. MATERIAL AND METHODS In this in vitro study using 140 bovine incisors, shear bond strength (SBS) of brackets with different base shapes (rectangle, flower, round, heart, diamond, star, and football) were measured with an Instron testing machine...
Peridynamic models that aim to incorporate a given classical local continuum stress-deformation response function typically start with a nonlocal averaged analog to the deformation gradient as input to the given local stress-deformation response function. This approach has been observed to allow unphysical deformations such as interpenetration and cause loss of linear stability. This paper desc...
We show herein how mechanical forces at macro or micro scales may affect the biological response at the nanoscale. The reason resides in the intimate link between chemistry and mechanics at the molecular level. These interactions occur under dynamic conditions such as the shear stress induced by flowing blood or the intracellular tension. Thus, resisting removal by mechanical forces, e.g., shea...
a r t i c l e i n f o Keywords: Distribution function Hot-carrier degradation nLDMOS transistor Spherical harmonics expansion Drift–diffusion scheme Interface states Modeling We analyze the applicability of different analytic models for the carrier distribution function (DF), namely the heated Maxwellian, the Cassi model, the Hasnat approach, the Reggiani model, and our own concept, to describe...
Finite Element Simulation Analysis of Central Pull-out Experiment of Steel Bar and Recycled Concrete
In order to study the bond performance of steel bars and recycled concrete, ultimate stress distribution between concrete is analyzed through central pull-out test, influence grooving on actual considered. Therefore, in this paper uses finite element software ABAQUS used simulate test discuss force concrete. The results show that simulation analysis experiment are good agreement with experiment...
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