Examinando por Materia "Industrial wastes"

Mostrando 1 - 4 de 4
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    Aislamiento y purificación de microorganismos degradadores de cianuro
    (Universidad EAFIT, 2006-10-12) Coley Benjumea, Tatiana; Zapata Zuluaga, Diana Paulina; Giraldo Estrada, Catalina
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    Dislocation density based flow stress model applied to the PFEM simulation of orthogonal cutting processes of Ti-6Al-4V
    (MDPI AG, 2020-01-01) Rodríguez, J.M.; Larsson, S.; Carbonell, J.M.; Jonsén, P.; Rodríguez, J.M.; Larsson, S.; Carbonell, J.M.; Jonsén, P.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecatrónica y Diseño de Máquinas
    Machining of metals is an essential operation in the manufacturing industry. Chip formation in metal cutting is associated with large plastic strains, large deformations, high strain rates and high temperatures, mainly located in the primary and in the secondary shear zones. During the last decades, there has been significant progress in numerical methods and constitutive modeling for machining operations. In this work, the Particle Finite Element Method (PFEM) together with a dislocation density (DD) constitutive model are introduced to simulate the machining of Ti-6Al-4V. The work includes a study of two constitutive models for the titanium material, the physically based plasticity DD model and the phenomenology based Johnson-Cook model. Both constitutive models were implemented into an in-house PFEM software and setup to simulate deformation behaviour of titanium Ti6Al4V during an orthogonal cutting process. Validation show that numerical and experimental results are in agreement for different cutting speeds and feeds. The dislocation density model, although it needs more thorough calibration, shows an excellent match with the results. This paper shows that the combination of PFEM together with a dislocation density constitutive model is an excellent candidate for future numerical simulations of mechanical cutting. © 2020 by the authors.
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    Evaluación de la biodegradación como alternativa para el tratamiento de aguas residuales de una tintorería y lavandería
    (Universidad EAFIT, 2008) Galeano Sánchez, Ana María; Osorio González, Lukas; Giraldo Estrada, Catalina
    The idea of this project came up from the company requirement of treating the sewage waters used in the chemical processes which go straight to the sewer, damaging the pipes, contaminating the recipients (usually small rivers) and generating stinky smells that causes affections to the health and wellbeing of the community around them.
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    Optimización de los parámetros de operación en un proceso de tratamiento de aguas por electro-oxidación
    (Universidad EAFIT, 2008-07-07) Angulo Bedoya, Mónica L.; Betancourt Latorre, Alejandra V.; Gil Pavas, Edison Hernán
    This study evaluated the electro-oxidation of phenolic resins production wastewater treatment. The experiments were carried out in a laboratory scale batch reactor with a monopolar configuration was built with graphite (anode) and titanium (cathode) electrodes. Prelimary tests were carried out with a sample volume of 200 ml, a submerged area of 25.13 cm2 for the graphite electrode and 40 cm2 for the titanium electrode and 240 minutes as a residence time, voltage of 15 V and an agitation value of 200 rpm.