Centro Universitario FEI: Envíos recientes
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Third abrasive wear mode: Is it possible?
(2014)The objective of this paper is to propose an initial discussion on the characterization of a third abrasive wear mode. The results obtained in a previous work [1] under different test conditions revealed the occurrence of ... -
Effect of pressure on abrasive wear mode transitions in micro-abrasive wear tests of WC-Co P20
(2013)The purpose of this work was to analyse the effect of the pressure (variable and constant) on the wear mode transition in ball-cratering wear tests. It was conducted using balls of 52100 steel, specimens of WC-Co P20 and ... -
Influence of the normal force, abrasive slurry concentration and abrasive wear modes on the coefficient of friction in ball-cratering wear tests
(2014)The purpose of this work is to study the influence of the normal force (N), abrasive slurry concentration (C) and abrasive wear modes on the coefficient of friction in ball-cratering wear tests. Experiments were conducted ... -
Effect of sliding distance on abrasive wear modes transition
(2015)© 2014 Brazilian Metallurgical, Materials and Mining Association.This work presents a study on the effect of sliding distance on abrasive wear modes transition in micro-abrasive wear. Ball-cratering wear tests were conducted ... -
Friction coefficient and wear mode transition in micro-scale abrasion tests
(2011)The purpose of this work was to conduct ball-cratering wear tests to monitor both normal and tangential forces. Balls of 52100 steel, a specimen of H10 tool steel and an abrasive slurry prepared with silicon carbide particles ... -
Study of the steady-state of wear in micro-abrasive wear tests by rotative ball conducted on specimen of WC-co P20 and M2 tool-steel Estudo da obtenção do regime permanente de desgaste em ensaios de desgaste micro-abrasivo por esfera rotativa conduzidos em corpos-de-prova de WC-co P20 e aço-ferramenta M2
(2018)© 2018, Universidade Federal do Rio de Janeiro. All rights reserved.Since its introduction to scientific community of tribologists, the micro-abrasive wear test by rotative ball has been adopted by renowned universities ... -
Evidence of Superposition between Grooving Abrasion and Rolling Abrasion
(2015)© 2015, Copyright © Society of Tribologists and Lubrication Engineers.In ball-cratering wear tests, two abrasive wear modes are commonly observed, grooving abrasion and rolling abrasion, which act in distinct areas. Observing ... -
Assessment of tribological properties of plasma nitrided 410S ferritic-martensitic stainless steels
(2019)© 2018 Elsevier B.V. Low Temperature Plasma Nitriding (LTPN) is a surface treatment that promotes surface hardening without harming the corrosion resistance of martensitic stainless steels. LTPN and conventional plasma ... -
A study on friction coefficient and wear coefficient of coated systems submitted to micro-scale abrasion tests
(2013)Several works on friction coefficient during abrasive wear tests are available in the literature, but only a few were dedicated to the friction coefficient in micro-abrasive wear tests conducted with rotating ball. This ... -
Predictive simulation of diabetic gait: Individual contribution of ankle stiffness and muscle weakening
(2017)© 2017 Elsevier B.V.Diabetic neuropathic individuals present massive muscle strength reduction at the ankle plantar- and dorsiflexors and increased joint stiffness. Our aim is to investigate the adaptation strategies to ... -
Searching for strategies to reduce the mechanical demands of the sit-to-stand task with a muscle-actuated optimal control model
(2016)© 2016Background The sit-to-stand task, which involves rising unassisted from sitting on a chair to standing, is important in daily life. Many people with muscle weakness, reduced range of motion or loading-related pain ... -
Muscle force distribution of the lower limbs during walking in diabetic individuals with and without polyneuropathy
(2017)© 2017 The Author(s).Background: Muscle force estimation could advance the comprehension of the neuromuscular strategies that diabetic patients adopt to preserve walking ability, which guarantees their independence as they ... -
Thermodynamic study of an EFGT (externally fired gas turbine) cycle with one detailed model for the ceramic heat exchanger
(2012)The EFGT (externally fired gas turbine) cycle has been considered as an option to burn biomass in gas turbines. One key element on the implementation of one EFGT cycle is the high temperature heat exchanger (HTHE) necessary ... -
Heat transfer and pressure drop correlations for finned plate ceramic heat exchangers
(2015)© 2015 Elsevier Ltd.The use of ceramic materials is a good option to build heat exchangers for high temperature applications when cost is a concern. This work presents heat transfer and pressure drop correlations for one ...