Heat Pulse
Mostrando 1-12 de 101 artigos, teses e dissertações.
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1. Efecto del tiempo de superpulso de soldadura sobre la evolución microestructural de un acero de bajo carbono
ABSTRACT The Super Pulse arc type was developed to provide a solution to butt root pass beads in the semi-automatic welding process with gas protection (GMAW). Unlike standard pulse welding, the Super Pulse uses a sequence of different pulse waveforms to create a cord shape and appearance similar to the GTAW process. It uses higher amperage in the primary ph
Matéria (Rio J.). Publicado em: 19/07/2018
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2. Investigation on the Effects of Process Parameters on Laser Percussion Drilling Using Finite Element Methodology; Statistical Modelling and Optimization
Abstract In the present research, the simulation of the Nickel-base superalloy Inconel 718 fiber-laser drilling process with the thickness of 1mm is investigated through the Finite Element Method. In order to specify the appropriate Gaussian distribution of laser beam, the results of an experimental research on glass laser drilling were simulated using three
Lat. Am. j. solids struct.. Publicado em: 2017-03
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3. Vibration of gold nano beam in context of two-temperature generalized thermoelasticity subjected to laser pulse
In the present work, the model of vibration of gold nano- beam induced by laser pulse heating is developed in the context of two-temperature generalized thermoelasticity and non-Fourier heat conduction. The analytic solution has been derived in the Laplace transform domain. The inverse Laplace transform has been calculated numerically and the numerical resul
Lat. Am. j. solids struct.. Publicado em: 2014
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4. Case depth in SAE 1020 steel using barkhausen noise
The most widely used thermochemical process for surface hardening of steels is case hardening. Using several different heat treatments, martensitic surface layers were formed on SAE 1020 steel into which carbon had been diffused. Case depths were measured by traditional destructive techniques. Barkhausen noise measurements were made and both the RMS Barkhaus
Mat. Res.. Publicado em: 18/06/2013
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5. An Analysis of the Initiation Process of Electro-explosive Devices
Abstract: Electro-explosive devices (an electric resistance encapsulated by a primary explosive) fundamentally convert electrical energy into thermal energy, to start off an explosive chemical reaction. Obviously, the activation of those devices shall not happen by accident or, even worse, by intentional exogenous influence. From an ordinary differential equ
J. Aerosp. Technol. Manag.. Publicado em: 2012-03
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6. Thermal effusivity estimation of polymers in time domain
An accurate knowledge of thermophysical properties is very important, for example, to optimize the engineering design and the development of new materials for many applications. Thermal effusivity is a thermal property which presents an increasing importance in heat conduction problems. This property indicates the amount of thermal energy that a material is
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2011-12
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7. Propriedades de transporte em meios granulares unidimensionais
Estudamos dois problemas envolvendo meios granulares, o transporte de calor em gases granulares viscosos e a propagação de pulsos mecânicos em cadeias granulares de anéis toróidais. Para estudar o transporte de calor em gases granulares, consideramos dois mecanismos de dissipação viscosa durante as colisões entre grãos. No primeiro mecanismo, a for�
Publicado em: 2011
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8. Calibrated heat-pulse method for the assessment of maize water uptake / Desenvolvimento do método do "pulso de calor" para determinação da absorção hídrica em milho
A determinação a campo das necessidades hídricas de plantas é um aspecto importante da produção agrícola, para o manejo correto do uso da água pelos cultivos. A absorção de água por uma cultura de milho (Zea mays L.), cultivado a campo, em condições de não limitação hídrica, foi verificada através da técnica do pulso de calor. Após a emis
Publicado em: 2010
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9. Caracterização térmica, grau de conversão, resistência à flexão e dureza de compósitos comerciais tratados termicamente / Thermal characterization, degree of conversion, flexural strength and Knoop hardness of heat treated commercial composites
Visando otimizar as propriedades químicas e mecânicas de compósitos de uso direto aplicados na forma indireta, associados a tratamentos térmicos experimentais (TT), torna-se necessária uma caracterização térmica que permita a determinação de uma temperatura de TT segura (abaixo da temperatura de início de perda de massa). Assim, a primeira etapa d
Publicado em: 2010
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10. Estudo da antinocicepção induzida pelo ultrasom terapêutico no modelo experimental de dor neuropática trigeminal, em ratos
The trigeminal neuralgia (TN) is considered one of the most painful conditions, where the pharmacological treatment can be as debilitating as the pathology itself. The aim of this work was to evaluate the effectiveness of pulsed Therapeutic Ultrasound (USt) on an experimental model of trigeminal neuropathic pain (Infraorbital Nerve - Chronic Constriction Inj
Publicado em: 2006
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11. Estudo fluidodinamico de um leito fluidizado pulsado rotativo com particulas secas e umidas / Rotating pulsed fluidized bed fluidynamics of dry and moist particles
The rotating-pulsed fluidized bed (RPFB) has been studied as an alternative for fluidization of materials that are difficult to operate in the Conventional Fluidized Bed (CFB). The RPFB apparatus is a conventional fluidized bed modified by the addition of a rotating plate with a 60º opening just below the distributor. The rotating plate insures a cyclic fee
Publicado em: 2005
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12. Caracterização de filmes finos de coloração por interferência em aços inoxidáveis
In this work, various experimental techniques were employed to study colored interference films deposited on the surface of AISI 304 stainless steel by an electrochemical pulsed current process developed at Fundação Centro Tecnológico de Minas Gerais Cetec. The influence of the film thickness on the mechanical properties of the coating-substrate system, o
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/02/2004