Creep Models
Mostrando 1-12 de 18 artigos, teses e dissertações.
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1. Flexure Based Energy Dissipating Device in Self-Centering Braces
Abstract Self-centering braces, in the current stage of development can accommodate large deformation and force levels. However, there is still a need for improvement of the energy dissipation mechanisms commonly incorporated in these braces. Yield based energy dissipation systems can overcome some of the problems faced with friction-based devices, such as s
Lat. Am. j. solids struct.. Publicado em: 28/10/2019
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2. On the creep behavior of carbon/epoxy non-crimp fabric composites
The use of composites in structural applications requires the study of specific properties to ensure that these materials are safe and an excellent option to replace some metals, for example. In the present study, vacuum assisted resin transfer molding (VARTM) was used prior to obtain carbon/epoxy non-crimp fabric composites. Dynamic mechanical analysis and
Mat. Res.. Publicado em: 26/02/2018
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3. Concreto ultraleve® estrutural com pérolas de EPS: caracterização do material e estudo de sua aplicação em lajes / Structural ultra lightweight concrete with EPS beads: material characterization and study of its use in slabs
The use of lightweight concrete is mainly due to the benefits provided by reducing the density of the material such as smaller efforts on structures, economy of molds and scaffolding, as well as lower costs of transportation and erection of precast constructions. Currently, besides the technical and economic issues, the choice of building materials should ta
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/10/2012
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4. Modelagem numérica de escavações de túneis em maciços evaporíticos / Numerical modeling of tunnel excavation in solid evaporite
A precaução com a ruína em um material geológico submetido a altas tensões é um problema bastante comum na Geotecnia. Em um túnel, por exemplo, durante a escavação, é possível gerar uma perda de equilíbrio que pode levar à ruptura, fechamento e perda do mesmo. Quando a perfuração é feita em um maciço com características de deformabilidade d
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/09/2012
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5. FORMULACÃO UNIFICADA PARA MODELOS CINETICOS DERIVADOS DA EQUAÇÃO DE BOLTZMANN COM CONDIÇÕES DE CONTORNO GENERALIZADAS / UNIFIED FORMULATION FOR KINETIC MODELS DERIVATIVES OF BOLTZMANN EQUATION WITH GENERALIZED BOUNDARY CONDITIONS
In this paper, we present numerical results obtained from the FORTRAN language for physical quantities of interest such as velocity prole, prole, heat ow rate, particle ow rate,heat ux and pressure tensor component. The gas ow occur in the direction parallel to thesurface the gas is conned because of a constant gradient of pressure and a constant gradient of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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6. Utilising neural networks and closed form solutions to determine static creep behaviour and optimal polypropylene amount in bituminous mixtures
The testing procedure in order to determine the precise mechanical testing results in Marshall design is very time consuming. Also, the physical properties of the asphalt samples are obtained by further calculations. Therefore if the researchers can obtain the stability and flow values of a standard mixture with the help of mechanical testing, the rest of th
Mat. Res.. Publicado em: 25/09/2012
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7. Analysis of creep and shrinkage and its utilization in health monitoring of reinforced concrete column. / Análise da deformabilidade por fluência e retração e sua utilização na monitoração de pilares de concreto.
This thesis presents the study of the time dependent deformation of concrete structures due to creep and shrinkage. Creep, shrinkage, compressive strength, splitting tensile strength and modulus of elasticity tests were performed in mixtures commonly used in construction. Experimental parameters were obtained from these mechanical characterizations and creep
Publicado em: 2010
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8. ImplementaÃÃo e AplicaÃÃo do Modelo de Visco-dano para problemas geomecÃnicos
A great advance in development of constitutive models for better simulation of geomechanical materials behavior has been observed in the last decades. A continuous medium subjected to degradation of its mechanical properties has a differentiated constitutive answer; hence itâs required the adoption of models based in Mechanic of Continuous Damage formulated
Publicado em: 2008
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9. Schistosomal granuloma as a system adaptive complex. Application of fractal dimension in characterization of their geometric properties. / Granuloma esquistossomótico como um sistema adaptativo complexo. Aplicação da dimensão fractal na caracterização de suas propriedades geométricas.
Schistosomal granuloma AS A COMPLEX ADAPTIVE SYSTEM: APPLICATION OF FRACTAL DIMENSION IN THE CHARACTERIZATION OF PROPERTIES GEOMETRIC. Waldemiro de Souza Romagna. [Introduction]. The schistosomal granuloma is a compact, organized collection of migrating cells, which along with cells of the affected organ, arrange themselves in the midst of extracellular matr
Publicado em: 2007
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10. Identification of structural parameters using inverse analysis / Identificação de parametros estruturais com emprego de analise inversa
Esse trabalho pretende contribuir para a interpretação do comportamento de estruturas de concreto a partir da utilização de técnicas de análise inversa. Estas técnicas permitem a determinação consistente dos diversos parâmetros envolvidos em seus modelos matemáticos, tomando-se por base a observação de estruturas de concreto. A utilização dess
Publicado em: 2006
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11. Estudo da viabilidade técnica do uso do resíduo de óleo de xisto como óleo extensor em ligantes asfalto-borracha / Study of the technical viability of using shale-oil residue as extender oil in asphalt-rubber binders
Asphalt binder and crumb rubber from discarded tires are materials that, most of time, are not compatible, requiring the addition of chemical products to facilitate the dispersion and incorporation of rubber particles as, for example, the extender oils. This research aims at evaluating the hypothesis that the shale-oil residue, once it is an aromatic oil, ma
Publicado em: 2006
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12. Time-dependent behavior of sulphatic rocks of the anhydrite and gypsum / Comportamento dependente do tempo de rochas sulfáticas de anidrita e gipso
The purpose of this thesis is to contribute for the knowledge of time-dependent behavior of sulfatic rocks of anhydrite and gypsum. Emphasis is given to provide straightforward arguments about physical mechanisms responsible for creep observed in some underground excavations in those rocks in Europe. Explanation for this phenomena is not clear yet and studie
Publicado em: 2005