Engineering Mechanics
Mostrando 13-24 de 60 artigos, teses e dissertações.
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13. Manutenção prescrita e manutenção real: uma abordagem baseada na atividade dos profissionais: o caso de uma indústria automobilística
This study aims to present the determinants of activity in real situations, characterized by variability and unpredictability inherent in production systems, as well as understanding and relevance of the requirements developed with the effective participation of professionals. With this purpose, we studied the activities of professionals (mechanics and elect
Publicado em: 2011
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14. Fracture morphology of carbon fiber reinforced plastic composite laminates
Carbon fiber reinforced plastic (CFRP) composites have been extensively used in fabrication of primary structures for aerospace, automobile and other engineering applications. With continuous and widespread use of these composites in several advanced technology, the frequency of failures is likely to increase. Therefore, to establish the reasons for failures
Materials Research. Publicado em: 2010-09
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15. The role of nonequilibrium thermo-mechanical statistics in modern technologies and industrial processes: an overview
The nowadays notable development of all the modern technology, fundamental for the progress and well being of world society, imposes a great deal of stress in the realm of basic Physics, more precisely on Thermo-Statistics. We do face situations in electronics and optoelectronics involving physical-chemical systems far-removed-from equilibrium, where ultrafa
Brazilian Journal of Physics. Publicado em: 2010-03
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16. GEOWEB, um facilitador para a aprendizagem em geotecnia / GEOWEB, a facilitator for learning in geotechnical
Historically and with more emphasis on the international level, efforts have been dedicated in the design and implementation of Learning Objects for the teaching of soil mechanics courses in Civil Engineering, in particular, to the topic of Water Movement in Soil. Following this vision, this paper examines the relationship between teaching and learning in th
Publicado em: 2009
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17. Fracture mechanics methods applied to medium density polyethylene designed for extrusion of pipes. / Métodos de mecânica da fratura aplicados a polietileno de média densidade destinado à extrusão de tubos.
Medium density polyethylene (MDPE) is a semicrystalline thermoplastic polymer that has been increasingly used in engineering applications, as plastic pipes for water and gas distribution systems. Under constant load, however, this material may occasionally present creep failure, by means of a mechanism of slow crack growth, leading to leakage losses in the s
Publicado em: 2009
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18. Caracterização fisica e mecanica de painel de OSB do tipo FORM / Physical characterization and mechanics of panel of OSB : panel of OSB
Amongst the panels derived wooden from reforestation, OSB (Oriented Strand Board), that it possesses a considerable resistance, and that, therefore, it is indicated for civil construction, it comes presenting growth in its production. In this context, the objective of this work is to present specific aspects important to be observed in laboratories research
Publicado em: 2009
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19. Metologia para determinação de parâmetros para solos não saturados utilizando ensaios com umidade conhecida
In general the determination of constitutive parameters for unsaturated soils requires tests with controlled suction or allows measurement of suction. In this case it is highlighted the technique of axis translation, steam transfer or osmotic techniques. But generally most laboratories of soil mechanics do not have these tests and even when they are availabl
Publicado em: 2009
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20. Defect engineering in H and He implanted Si
The present work relates an investigation of H2 + and He+ coimplanted (001)-Si substrates. The phenomena of blistering and exfoliation were studied by SEM as a function of the implantation parameters (energy, fluence, current and H/He ration) and annealing protocol. A window behavior as function of the implanted fluence was observed and two distinct fluence
Publicado em: 2009
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21. Nonlinear boundary element models to analyse fracture problems and reliability/optimization models applied to structures submitted to fatigue / Modelos não lineares do método dos elementos de contorno para análise de problemas de fratura e aplicação de modelos de confiabilidade e otimização em estruturas submetidas à fadiga
This work deals with the development of boundary element method (BEM) formulations to be used in engineering problems. Particular attention is given to using these formulations in development of reliability and optimization models applied to fatigue problems. Contributions to BEM formulations are developed, particularly, models that deal with crack growth in
Publicado em: 2009
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22. Inovação tecnológica e a tríplice hélice : interações em rede entre projetos dos institutos do milênio (MCT/2001) e patentes brasileiras registradas no escritório norte-americano (USPTO) após 2004
According to evolutionary theory of technological innovation (NELSON; WINTER [1982]2005), this work aims analyze the network interactions between projects of IMP - Institutos do Milenio Program (PADCTIII/MCT; 2001) and registered Brazilian patents in USPTO - United States Patent and Trademark Office after 2004. Through the Model of Analysis of the Technologi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/12/2008
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23. Construcción y caracterización de un tubo Ranque-Hilsch
The phenomenon of temperature distribution in a rotating gas flow is known as the Ranque-Hilsch effect. The Ranque-Hilsch tube (R-H ) is a system that in absence of movable parts separates an air flow in two portions, cold and hot ones. In this work a R-H tube is constructed using low cost pieces. We showed that effect is dependent of some of its parameters
Revista Brasileira de Ensino de Física. Publicado em: 2008-12
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24. Aplicação de moire de projeção com deslocamento de fase na geração de modelos digitais topograficos de orgão vegetais / Applications of projection moire technique with phase shifiting to agricultural engineering problems
Shape definition of bodies exhibiting symmetric, non symmetric or irregular geometry is of fundamental necessity for science and technology developments. Applications of objects shape survey is reflected on several science fields as biology, human prosthesis and orthesis, medical diagnosis, prediction of surgical results, orthopedics, veterinary medicine, in
Publicado em: 2008