Computational Mechanics
Mostrando 13-24 de 63 artigos, teses e dissertações.
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13. On numerical solution strategies of contact problems / Sobre estratégias de resolução numérica de problemas de contato
Contact problems represent a class of solid mechanics problems for which the nonlinear behavior is caused by the change of the boundary conditions during the solution process. The present work treats contact problems observing aspects of its formulation and numerical implementation. Specifically, the formulation for two different contact elements is presente
Publicado em: 2009
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14. Paraconsisted computation : a logic approach to quantum / Computação paraconsistente : uma abordagem logica a computação quantica
This work provides evidences to view computational complexity as logic-relative, by introducing new models of computation through non-classical logics and by studying their features with respect to computational expressivity and efficiency. From this point of view, we suggest a new way to study the efficiency of quantum computational models consisting in the
Publicado em: 2009
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15. Formulação dual em mecânica da fratura utilizando elementos de contorno curvos de ordem qualquer / Dual boundary element formulation in fracture mechanics using curved element of any order
This work presents the dual boundary element formulation applied to linear crack problem. The goal of this research is the evaluation of stress intensity factor for two-dimensional crack problem using three different techniques, which are: the technique of correlation of displacements, the technique based on the state of tension at the crack tip and J integr
Publicado em: 2009
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16. Aplicações de mecânica estatística a especiação simpátrica e inferência aproximativa / Applications of statistical mechanics to sympatric speciation and aproximative inference
This thesis presents applications of the framework of Statistical Mechanics to two independent problems. The first corresponds to a computational model for the evolution of Assortative Mating in the Sympatric Speciation process; and the second a learning algorithm built by means of a Bayesian Inference approach. In the biological problem each individual in a
Publicado em: 2009
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17. Modelo dinamico para o contato em mancais de elementos rolantes sujeito a lubrificação elastohidrodinamica / Dynamic model for the contact in rolling element bearings under elastohydrodynamic lubrification
With the need of time reduction on mechanical projects, the use of computational models for the analysis of mechanical components becomes mandatory in order to avoid excessive physical tests. Based on this assumption, is necessary to study the dynamic of previously assumed rigid components, as the rolling elements bearings, and thus knowing its influence on
Publicado em: 2009
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18. Aspectos de física estatística na evolução e no crescimento molecular. / Aspects of statistical physics on evolution and in molecular growth.
Molecular Evolution, stimulated and supported by Evolution Synthetic Theory, became essential to understand evolution of life. Genomic growth was responsible to increase the capacity of storage information and to stability of the molecule; besides, it was also submitted to natural selection. Using amplification-mutation-selection methodology, such as SELEX (
Publicado em: 2009
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19. Simulador de meios porosos saturados elastoplasticos / Numerical simulator of saturated elastoplastic porous media
The exploration of mineral resources is growing in importance in the Brazilian economy. Since the environments in which these resources are found are becoming increasingly more complex and challenging for the production phase, currently unavailable knowledge and technologies are required to produce these reserves. In the particular well drilling and completi
Publicado em: 2009
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20. Numerical Simulation of Accidental Explosions in Offshore Production Plant
The production of oil and gas is an inherently hazardous task. Therefore it is crucial to provide reliable estimates of the risks involved. The major contributors to the risk level of an offshore installation, for example, arise from accidents involving explosion and fire. Computational Fluid Dynamics (CFD) can be a powerful tool to help with the calculation
Publicado em: 2009
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21. Simulation of cooling process of grain using the computational fluid mechanics / Simulação do processo de resfriamento de grãos usando a mecânica dos fluidos computacional
A safra de grãos 2007/2008 foi uma das maiores na história do Brasil. Foram produzidos em torno de 143,87 milhões de toneladas, com destaques para o milho e soja, que respondem por aproximadamente 84% desse total. A aeração é feita com o objetivo de manter a qualidade inicial dos grãos durante o período de armazenamento, conservando a temperatura dos
Publicado em: 2009
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22. Numerical solutions to a cloth model based on the Cosserat surface / Soluções numericas em um modelo de tecidos baseado na superficie de Cosserat
Currently, physics-based models are frequently used for cloth simulations. There are basically two approaches: particle mechanics and continuum mechanics. The particle mechanics is at the present time the most widely used method, having some advantages like an easy formulation and a high performance. The continuum mechanics is regarded as being a more precis
Publicado em: 2008
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23. Least squares and point-based surfaces: new perspectives and Applications / Minimos-quadrados e aproximação de superfície de pontos: novas perspectivas e aplicações
Surface reconstruction from unorganized points has been one of the most promising scientific research areas in Computer Graphics. In addition, it has been used successfully for the definition of fluid interface in numerical simulation of fluid flow. There are several reasons to that fact: for instance, considering Computer Graphics, we have the handling of o
Publicado em: 2008
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24. Desenvolvimento de um simulador para problemas multi-fÃsicas
Simulation of coupled natural phenomena, such as the evolution of material damage due to mechanical and chemical loads, are becoming more and more important in the engineering pratice. This was influenced by the growth of Computational Mechanics software industry. Despite the computational advance, it still applies software engiheering development techniques
Publicado em: 2007