Geometry Models
Mostrando 25-36 de 200 artigos, teses e dissertações.
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25. Potencialidades computacionales del Método de los Elementos Finitos para la modelación y simulación de materiales compuestos: revisión
This work presents a review of computational models that use the Finite Elements Method (FEM) for the study of composite materials mechanical behavior, focusing the analysis in materials reinforced by particles or fibers. Bibliographic analysis shows that using FEM it is possible to successfully estimate the effect on the composites mechanical properties, of
Matéria (Rio J.). Publicado em: 2015-06
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26. A numerical investigation into ultimate strength and buckling behavior of locally corroded steel tubular members
This paper presents the results of anumerical investigation into ultimate strength of locally corroded tubular member sunder axial compressive loads. A parametric finite element approach was used in order to simulatestructuralbehavior of damaged members. The results were then examined against an available experimental test. Validated models were used to deri
Lat. Am. j. solids struct.. Publicado em: 2014-11
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27. Study of structural capacity and serviceability affecting the obstruction of residential door
The last Chilean earthquake, occurred on February 27, 2010, allowed establishing important patterns of structural failures in reinforced concrete residential buildings; however, limited progress has been made in the study of basic standards of serviceability, such as obstruction of doors. Thus, this study focused on measuring the influence of design specific
Lat. Am. j. solids struct.. Publicado em: 2014-05
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28. A maximum margin-based kernel width estimator and its application to the response to neoadjuvant chemotherapy
INTRODUCTION: Function induction problems are frequently represented by affinity measures between the elements of the inductive sample set, and kernel matrices are a well-known example of affinity measures. METHODS: The objective of the present work is to obtain information about the relations between data from a calculated kernel matrix by initially assumin
Rev. Bras. Eng. Bioméd.. Publicado em: 2014-03
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29. Fractografía y disipación de energía cinética en un panel balístico de cerámica/polímero sometido al impacto de un proyectil metálico
In this study we have explored the behavior and the damage mechanisms of a laminate panel composed of polymeric and ceramic materials, submitted to the impact of a metallic projectile. The design of a system with the impact side in ceramic material (SiC) was made, with a support of an ultra-high molecular weight polyethylene (UHMWPE), plaques made with 200 m
Matéria (Rio J.). Publicado em: 2013-09
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30. Explorando as percepções de professores em serviço sobre as visualizações no ensino de química
Taking into account the requirements for the teaching of chemistry, several visualization resources (software, videos, animations, molecular models, among others) are available. These visual aids are used in order to enhance the understanding of chemical phenomena in the classroom. However, many teachers make scant use of these resources, limiting macroscopi
Quím. Nova. Publicado em: 2013
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31. Desenvolvimento de um ambiente para simulação da manufatura baseado em features e realidade virtual / Development of environment for simulation of manufacturing based on features and virtual reality
Nowadays with the diversification of products demanded, manufacturing systems have become increasingly complex and with difficult operation. Hardly the person responsible for the manufacturing area has all the information necessary to anticipate the details for their implementation. On the other hand, companies don\ t have the time or resources to test alter
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/10/2012
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32. Estudo sobre a identificação de hádrons em câmaras de fotoemulsão / Study about hadron identification in emulsion chambers
This work introduces the importance of photoemulsion chambers that remain in use after decades and still offer many advantages for elementary particle physics. We cite OPERA (Oscillation Project with Emulsion-tRacking Apparatus) detector that is the greatest lead photoemulsion chamber detector ever constructed as an example of its application nowadays (nine
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/04/2012
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33. Modelamiento geométrico del cambio de coordenadas UTM causadas por mudanza de referencial geodésico: Caso Sirgas - Chile
Technological advances in recent decades have allowed determining with increasing precision, parameters related to size, shape and gravitational field of the Earth. These new technologies and methods of observation and analysis, accept the use of different Geodetic Reference Systems (GRS) that enable the description of position of any point on Earth's surfac
Bol. Ciênc. Geod.. Publicado em: 2012-12
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34. An effective thickness proposal for strength evaluation of one-side pitted steel plates under uniaxial compression
This paper presents the results of an investigation into the post-buckling behaviour and ultimate strength of imperfect pitted steel plates used in ship and other marine-related structures. A series of elastic-plastic large deflection finite element analyses is performed on pitted steel plates. The effects of pitting corrosion on one side of the plates are i
Lat. Am. j. solids struct.. Publicado em: 2012-08
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35. Estudo da corrosão localizada da liga de alumínio 7475-T761 por espectroscopia de impedância eletroquímica global e local em meio de sulfato de sódio. / Localized corrosion study of aluminum alloy 7475-T761 in sulfate medium using global and local electrochemical impedance spectroscopy.
Aluminum alloys used in the aerospace industry with structural purpose exhibit a complex microstructure due to thermal and mechanical treatments they are submitted for improving their strength. The microstructure of these alloys is characterized by the presence of a great number of intermetallic (IM) particles, the electrochemical activity of which is differ
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/07/2011
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36. Modelagem em geometria digital aprimorada por técnicas adaptativas de segmentos de retas. / Digital geometry modelling enhancement by straight line segment adaptive techniques.
For the representation of digital straight lines, digitized straight line segments and arcs, each of the available research approaches has its advantages and suitable applications. However, taking into account the complexities of real-world scenarios, the use of these representations is not so popular in situations that require flexible models or involving s
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/05/2011