Deformation Mechanics
Mostrando 25-36 de 40 artigos, teses e dissertações.
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25. Novozhilov's mean rotation measures invariance
In this article the invariance of the Novozhilov's mean rotation measures will be emphasize by the invariance of the determinant of the gradient of deformation tensor of continuum mechanics, or the invariance of the second principal invariant of the tensor (I + E)-1 W.
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2005-09
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26. Development of alternative methods to the assessment of the creep fracture resistance of polyethylene resins used for the extrusion of water pipes. / Desenvolvimento de métodos alternativos para a avaliação da resistência à fratura por fluência de resinas de polietileno utilizadas para a extrusão de tubos de água.
Polyethylene has been largely used in potable water distribution systems, mainly in service lines. This polymer offers many advantages over its competitors: flexibility, low cost, ease installation and corrosion resistance. Pipes made with high density polyethylene HDPE, the generic designation of the material in the sanitation industry in Brazil fail
Publicado em: 2005
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27. VISUALIZAÇÃO DE MODELOS DE ENGENHARIA VIA WEB UTILIZANDO VRML / VISUALIZATION OF ENGINEERING MODELS THROUGH THE WEB USING VRML
The growing increase in computational resources for numerical simulation allows researchers and engineers to generate huge amount of data. The understanding of those data through the use of computer graphics techniques is known as Scientific Visualization. This work proposes a Scientific Visualization of engineering problems through the use of a distributed
Publicado em: 2004
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28. Estudo teórico-experimental do comportamento de nós de pórtico de concreto armado submetidos a ações cíclicas / Theoretical and experimental study of reinforced concrete frame joints behavior under cyclic load
The present thesis studies the behavior of frame joints in reinforced concrete beam-column joints subjected to cyclic loads. The thesis is divided into two parts: an experimental study and a theoretical-based study. The experimental study is based on laboratory tests on five physical models of beam-column joints. The results of this experimental study permit
Publicado em: 2004
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29. Modelagem de vigas de compósitos laminados usando elementos finitos formulados na notação strain gradient
This work analyzes laminated .composite beams using finite elements formulated in strain gradient notation, which is a physically interpretable notation. Strain Gradient notation allows for the evaluation of modeling capabilities of finite elements, as well as for the identification and elimination of modeling errors a-priori. Initially a literature review i
Publicado em: 2002
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30. COMPUTATIONAL METHODS FOR GEOLOGICAL SECTIONS RESTAURATION. / PROCEDIMENTOS COMPUTACIONAIS PARA O BALANCEAMENTO DE SEÇÕES GEOLÓGICAS
This work presents a new approach for the restoration of geological cross-sections that is based on physical modeling and numerical simulation. The main purpose is to introduce Continuum Mechanics concepts into the geological restoration process in order to consider physical properties of the materials during the simulation of the movement of a rock block al
Publicado em: 2002
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31. Cálculo de esforços e deslocamentos em estruturas de pisos de edifícios, considerando-se a influência das tensões cisalhantes / Determination of displacements and internal forces in reinforced concrete building floor structures, considering the shear stress influence.
In this work, Reinforced concrete grids are analysed, assuming non-linear models based on the damage theory, and also incorporating into shear deformations. The proposed CEB-158 and the NBR-6118 models for reinforced concrete members are discussed, as well as the elastoplastic model assumed for the reinforcement. The Timoshenko s beam theory is studied and a
Publicado em: 2000
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32. Utilização de solo-cimento plastico em estacas escavadas com trado mecanico em Ilha Solteira-SP
The aim of this research was to verify the viability of the applicability of plastic-soil cement as a foundation element in terms of workability, resistance and deformation characteristics, load transfer to the soil and behavior after aging. For this, it was done intense laboratory study in the plastic-soil cement material and it was carried out six load tes
Publicado em: 2000
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33. Lamin A/C deficiency causes defective nuclear mechanics and mechanotransduction
Mutations in the lamin A/C gene (LMNA) cause a variety of human diseases including Emery-Dreifuss muscular dystrophy, dilated cardiomyopathy, and Hutchinson-Gilford progeria syndrome. The tissue-specific effects of lamin mutations are unclear, in part because the function of lamin A/C is incompletely defined, but the many muscle-specific phenotypes suggest t
American Society for Clinical Investigation.
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34. Elucidating the Mechanism behind Irreversible Deformation of Viral Capsids
Atomic force microscopy has recently provided highly precise measurements of mechanical properties of various viruses. However, molecular details underlying viral mechanics remain unresolved. Here we report atomic force microscopy nanoindentation experiments on T=4 hepatitis B virus (HBV) capsids combined with coarse-grained molecular dynamics simulations, w
The Biophysical Society.
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35. The effects of isolation on the mechanics of the human heel pad.
In previous studies on the mechanical properties of the human heel pad (Bennett & Ker, 1990; Aerts et al. 1995) the fat pad and part of the calcaneus was removed from amputated test specimens. The present study tested whether this procedure influences the mechanical behaviour of the sample. Intact amputated feet were therefore mounted on steel rods driven th
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36. Local DNA stretching mimics the distortion caused by the TATA box-binding protein
X-ray structures of the TATA box-binding protein complexed with its DNA target show that the nucleic acid is severely bent away from the protein and also strongly unwound. We have used molecular mechanics and energy mapping to understand how such an unusual conformation can be induced. The results show that simple deformation pathways involving local st
The National Academy of Sciences of the USA.