Centro Universitario FEI: Recent submissions
Now showing items 241-260 of 2182
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Impacto nas Propriedades Mecânicas e Tensões Residuais do Material ASTM A572 Grau 50 Soldado por Arco Submerso com Alívio de Tensões Térmico
(2019-10-29)O aço ASTM A572 Grau 50 é utilizado na fabricação de conjuntos soldados para aerogeradores, por este motivo, a realização de alívio de tensões é de grande importância para correção dos impactos causados pelos processos de ... -
Review: Effect on physical, mechanical, and wear performance of ZrB -based composites processed with or without additives
(2020-06-03)Because of unique combination of properties, ultra high temperature ceramics (UHTCs) are considered the most suitable material for applications in extreme en-vironments as in hypersonic flights, atmospheric ... -
Influência da temperatura de resfriamento sobre a variação mássica e resistência mecânica de ABS injetado
(2020-06-22)Peças de ABS injetadas e submetidas a diferentes temperaturas de resfriamento podem apresentar variações em sua massa e diferentes níveis de resistência mecânica. O objetivo deste trabalho é estudar a influência da ... -
Tribological Behavior Analysis of the ISO 5832-1 Austenitic Stainless-Steel Treated by Optical Fiber Laser Used for Biomedical Applications
(2019-11-15)The present work analyzed the influence of an optical fiber laser surface treatment process on the tribological behavior of the ISO 5832-1 austenitic stainless-steel, basing on the wear volume and friction coefficient. ... -
Study of the Influence of the Micro-Abrasive Wear Modes on the Behaviors of the Volume of Wear and Coefficient of Friction of Thin Films Submitted to Micro-Abrasive Wear
(2019-04-13)The purpose of this work is to study the influence of the micro-abrasive wear modes on the behaviors of the volume of wear (V) and on the coefficient of friction (µ) of thin films. Experiments were conducted with thin films ... -
INFLUENCE OF ABRASIVE WEAR MODES ON THE COEFFICIENT OF FRICTION OF THIN FILMS
(2018-11-05)The purpose of this work is to study the influence of abrasive wear modes on the coefficient of friction (μ) of thin films. Initially, free rotative-ball micro-abrasive wear testing equipment was designed and constructed ... -
Numerical modelling of a geothermal pile in tropical environment based on a TRT Test
(2020-11-18)The continuous search for sustainable renewable energy sources has motivated the use of geothermal piles to heat or cool buildings, resulting in lower electric energy consumption. Geothermal piles are foundation elements ... -
An integrated model of the thermoregulatory and respiratory systems of the human body
(2020-07-05)This work aims to develop a mathematical model for computing the distribution of temperature, O2, and CO2 in the human body, depending on the ambient conditions. The body is divided into segments, including layers of tissues ... -
Exergy efficiency on incremental stationary bicycle test: A new indicator of exercise performance?
(2019-11-16)The frst and second laws of the thermodynamics were applied to the human body to evaluate the performance of subjects under diferent training levels. Ten cyclists were evaluated in the stationary bicycle with the indirect ... -
Phenomenological and Thermodynamic Model of Gas Exchanges in the Placenta during Pregnancy: A Case Study of Intoxication of Carbon Monoxide
(2019-10-19)The present work simulates the transport of oxygen, carbon dioxide, and carbon monoxide between a fetus’s circulatory system and the mother’s. The organ responsible for this exchange is the placenta. Carbon monoxide is a ... -
Modeling stick-slip in bolted joint tightening process
(2020-04-09)Stick-slip affects torque-preload relationship during bolted joint tightening process. Its occurrence is not always possible to avoid and it can lead to an unreliable joint. In this study, tightening process was investigated ... -
Influence of flank clearance on the performance of a scroll expander prototype
(2020-02-15)Scroll expanders are positive displacement machines with great potential for the implementation of organic Rankine cycle (ORC) and compressed air energy storage (CAES) systems, particularly for small scale plants or ... -
Analysis of the Metallurgical Bonding between Inconel and NiCrAlY Coatings by HVOF and with CO2</sub> Laser Beam
(2016-08-05)Coatings are applied on turbine blades’ surfaces to provide protection not only against high temperature but also against aggressive environment. Ceramic coatings are employed to avoid metallic substrate overheating, while ... -
EFFECTS OF A CLOSED-LOOP PARTIAL POWER ASSISTANCE ON MANUAL WHEELCHAIR LOCOMOTION
(2018-12-12)In manual wheelchair locomotion, the large upper extremity loads and the repetitions of the propulsion movement increase the incidence of upper limbs injuries, pain and muscle fatigue. The main goal of this study was to ... -
PROJETO DE CONTROLADORES PID ROBUSTOS VIA OTIMIZAÇÃO NUMÉRICA COM APLICAÇÃO NO CONTROLE DE NÍVEL
(2019-12-20)O estudo de sistemas dinâmicos é um problema frequente nas diferentes áreas da Engenharia. Quando as especificações de desempenho relacionadas a esses tipos de sistemas são rigorosas, normalmente se utilizam sistemas de ... -
RANS-Based CFD Calculation for Pressure Drop and Mass Flow Rate Distribution in an MTR Fuel Assembly
(2020-10-30)This work presents a Reynolds-averaged Navier Stokes–based computational fluid dynamics methodology for the calculation of pressure drop and mass flow rate distribution in a material test reactor flat-plate-type standard ... -
Simple machine learning allied with data-driven methods for monitoring tool wear in machining processes
(2020-08-01)The aim of this work was to identify the occurrence of machine tool wear in carbide inserts applied in a machine turning center with two steel materials. Through the data collected with an open-source communication protocol ... -
MQL Strategies Applied in Ti-6Al-4V Alloy Milling-Comparative Analysis between Experimental Design and Artificial Neural Networks
(2020-08-30)This paper presents a study of the Ti-6Al-4V alloy milling under different lubrication conditions, using the minimum quantity lubrication approach. The chosen material is widely used in the industry due to its properties, ... -
The effect of process parameters and cutting tool shape on residual stress of SAE 52100 hard turned steel by high speed machining
(2020-04-26)This study focused on determining the residual stress of SAE 52100 hard-turned steel. The objective was to evaluate and compare the effects of the cutting-edge geometry and cutting parameters (cutting speed, feed rate, and ... -
Comparação entre ferramentas para furação de polímeros reforçados por fibra de vidro
(2006-04-05)Para obter furos de boa qualidade em matrizes termofixas reforçadas com fibra de vidro, deve-se reduzir a força axial e o torque durante a furação. O estudo experimental relatado neste artigo avalia o desempenho e aponta ...