Drop Impact
Mostrando 13-24 de 60 artigos, teses e dissertações.
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13. Crashworthiness Analysis and Evaluation of Fuselage Section with Sub-floor Composite Sinusoidal Specimens
Abstract Crashworthiness is one of the main concerns in civil aviation safety particularly with regard to the increasing ratio of carbon fiber reinforced plastic (CFRP) in aircraft primary structures. In order to generate dates for model validations, the mechanical properties of T700/3234 were obtained by material performance tests, and energy-absorbing resu
Lat. Am. j. solids struct.. Publicado em: 2016-06
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14. THE EFFECT OF SYSTEM TEMPERATURE AND PRESSURE ON THE FLUID-DYNAMIC BEHAVIOR OF THE SUPERCRITICAL ANTISOLVENT MICRONIZATION PROCESS: A NUMERICAL APPROACH
Abstract The Supercritical Antisolvent (SAS) technique allows for the precipitation of drugs and biopolymers in nanometer size in a wide range of industrial applications, while guaranteeing the physical and chemical integrity of such materials. However, a suitable combination of operating parameters is needed for each type of solute. The knowledge of fluid d
Braz. J. Chem. Eng.. Publicado em: 2016-03
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15. Dynamics of Drop Impact Against Surfaces Covered with Langmuir-Blodgett Layers
The dynamics of sucessive impacts of water droplets against flat glass surfaces covered by Langmuir-Blodgett films of zinc stearate with 1, 3, 5 and 7 layers was investigated. The structure and resistance of monolayers to the impact was evaluated by using fast images of the drop deformation, Brewster angle microscopy (BAM) and contact angle measurements. Eve
J. Braz. Chem. Soc.. Publicado em: 2016-02
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16. Experimental and numerical investigation of lattice-walled cylindrical shell under low axial impact velocities
Abstract This research was an experimental and numerical investigation of the cylindrical expanded Sheets under impact loading. Two types of absorbers with different cell angles were examined (i.e. α = 0 and α = 90). The experiments were performed using the drop hammer setup, and the numerical simulations were conducted by ABAQUS. In this study, the type o
Lat. Am. j. solids struct.. Publicado em: 2015-10
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17. CFD modeling of two immiscible fluids mixing in a commercial scale static mixer
A Computational Fluid Dynamics model based on the Eulerian formulation for multiphase flow was developed to model the mixing hydrodynamics of two immiscible fluids in a commercial scale static mixer. The two immiscible liquids were condensate and caustic solutions and were considered as two phases that are interpenetrating each other. The aim of this study w
Braz. J. Chem. Eng.. Publicado em: 2014-12
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18. Avaliação de Impacto das condicionalidades de educação do Programa Bolsa Família (2005 e 2009)
This paper analyzes the impact of the educational conditions of Brazil's Bolsa Família Program on the dropout rates of children benefiting from the program. The main hypothesis is that children living in a household that receives the benefit have a lower chance of dropping out of school. Data are from the 2005 and 2009 Impact Evaluation of the Bolsa Famíli
Dados. Publicado em: 2013-09
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19. Determinação do impacto do oversizing da endoprótese sobre a aorta torácica. Estudo experimental em porcos / Impact of stent-graft oversizing on the thoracic aorta: experimental study in a porcine model
Introduction: The use of endovascular techniques to treat the various disorders of the aorta has supplanted traditional open techniques, and is particularly promising in trauma1. The traumatic rupture of the aorta is the second leading cause of death by traffic accident2, 3, and repair of these lesions with endoluminal stents has showed lower mortality and p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/11/2012
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20. Impact properties of aluminium - glass fiber reinforced plastics sandwich panels
Aluminium - glass fiber reinforced plastics (GFRP) sandwich panels are hybrid laminates consisting of GFRP bonded with thin aluminum sheets on either side. Such sandwich materials are increasingly used in airplane and automobile structures. Laminates with varying aluminium thickness fractions, fiber volume fractions and orientation in the layers of GFRP were
Materials Research. Publicado em: 27/03/2012
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21. Efeitos de dois tipos de sessão de treino em parâmetros fisiológicos e neuromusculares de patinadores
Artistic roller skating has been developed over the years to become the competitive sport currently seen. However, little information exists in the literature regarding the intensity of the practices of this sport and if there could be a way to expose the athlete to a lower number of impacts of the jumps during training, but at the same time to achieve the s
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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22. Estudo do processo de calcinação como operação unitária adicional na pelotização de minérios de ferro com altos valores de PPC
The mineral resources from the Alegria complex, at the Mariana Ouro Preto/MG region, where Samarco´s deposits (Alegrias Norte, Centro and Sul) are located, present a significant parcel of composition related to low iron grade itabirites (below 50%) and high LOI contents (above 3.5%). The search for producing concentrates from these deposits using the curren
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/06/2011
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23. Transmission of a 20 Gb/s NRZ OOK signal throughout a 390 km fiber link and a cascade of 11 x 50 GHz filters and 9 x EDFAs
This paper presents a qualitative analysis of the impact caused by fiber propagation effects and by a cascade of optical filters, designed for 10 Gb/s NRZ OOK transmission, and optical amplifiers on a 20 Gb/s NRZ OOK optical signal traveling a 390 km fiber link. The choice for such bit rate and modulation format has been driven by the 50 GHz bandwidth of the
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2011-06
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24. Labor supply, taxes and informality / Oferta de trabalho, impostos e informalidade
The informal sector has reached significant levels in developing countries. In Brazil about 50% of jobs are informal and account for nearly 40% of national GDP. The traditional neoclassical growth model does not explain why, given the significant increase in tax rates in the early 90s, Brazilians did not work less. The traditional model predicts a dramatic d
Publicado em: 2010