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Ítem STUDENT ACCEPTANCE AND PERFORMANCE OF A VIRTUAL PLATFORM FOR TRAINING AND EVALUATION OF STATICS COURSE(IEEE, 2016-10-01) BARBOSA, JAIME LEONARDO; BARBOSA, JAIME LEONARDO; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecatrónica y Diseño de MáquinasÍtem Full Scale Fatigue Test Performed to the Bolster Beam of a Railway Vehicle(Springer-Verlag France, 2016-11-01) BARBOSA, JAIME LEONARDO; BARBOSA, JAIME LEONARDO; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecatrónica y Diseño de MáquinasÍtem Characteristic Point Sequences in Local and Global Bifurcation Analysis of Filippov Systems(World Scientific and Engineering Academy and Society (WSEAS) Press, 2008-10-01) Arango, Iván Darío; Arango, Iván Darío; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecatrónica y Diseño de MáquinasÍtem Localización de Bifurcaciones Deslizantes en un Oscilador Rotativo de Doble Leva(UNIV NAC COLOMBIA, FAC NAC MINAS, 2011-06-01) Arango, Iván Darío; Arango, Iván Darío; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecatrónica y Diseño de MáquinasÍtem Continuation of Nonsmooth Bifurcations in Filippov Systems Using Singular Point Tracking(2007-12-01) Arango, Iván Darío; Arango, Iván Darío; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecatrónica y Diseño de MáquinasÍtem Corporificación(Fondo Editorial Universidad EAFIT, 1999-10-01) RODRIGUEZ, ALBERTO; RODRIGUEZ, ALBERTO; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecatrónica y Diseño de MáquinasÍtem Diseño de punzonadoras CNC para pequeños lotes de producción(2012-07-01) Arango, Iván Darío; Arango, Iván Darío; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecatrónica y Diseño de MáquinasÍtem Design and contruction of simulators from out of service planes for parks of diversion(2005-01-01) Arango, Iván Darío; Arango, Iván Darío; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecatrónica y Diseño de MáquinasÍtem El tema de Tesis, una decisión importante para el pais(Fondo Editorial Universidad EAFIT, 1997-06-01) Arango, Iván Darío; Arango, Iván Darío; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecatrónica y Diseño de MáquinasÍtem Bifurcations and Sequences of Elements in Non-Smooth Systems Cycles(2013-09-01) RUIZ, OSCAR EDUARDO; Arango, Iván Darío; RUIZ, OSCAR EDUARDO; Arango, Iván Darío; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecatrónica y Diseño de MáquinasÍtem 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 MáquinasMachining 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.Ítem The Effect of Student Work Group Emotional Intelligence on Individual Task Performance in Teams(SAGE Publications Ltd, 2020-01-01) Román-Calderón J.P.; Aguilar-Barrientos S.; Escalante J.E.; Barbosa J.; Arias Salazar A.; Román-Calderón J.P.; Aguilar-Barrientos S.; Escalante J.E.; Barbosa J.; Arias Salazar A.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecatrónica y Diseño de MáquinasBackground: The development of employability skills is a concern of educational institutions, which must introduce experiential learning scenarios for undergraduate students. Purpose: This study is aimed at testing the relationship between emotional intelligence and individual task performance in teams, during a recruiting activity for an experiential learning program. Methodology/Approach: Self-reported and third rater’s measures were used to assess both variables as part of the selection process of participants on an experiential learning program focused on engineering competitions. Exploratory structural equation modeling was used for data analysis. Findings/Conclusions: Results show partial support of the hypothesis by revealing a significant but apparently counterintuitive relationship. Implications: The study reveals the measurement of employability skills as a challenge and a necessity. For employers, it reinforces that teamwork, socialization, and daily organizational endeavors require the appropriate soft skills to obtain good performance levels. © The Authors 2020.Ítem The Effect of Student Work Group Emotional Intelligence on Individual Task Performance in Teams(SAGE Publications Ltd, 2020-07-15) Roman, J.; Roman, J.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecatrónica y Diseño de MáquinasÍtem Selective polishing method to increase precision in large format lightweight machine tools working with petrous material(IMPRENTA UNIV ANTIOQUIA, 2019-01-01) Arango-Lopez, ID; Copete-Murillo, LOD; Arango-Lopez, ID; Copete-Murillo, LOD; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecatrónica y Diseño de MáquinasIn this article two complementary methods are developed. Firstly, a method to add precision in large machine tools with modular lightweight structures (APLM), which performs the compensation of geometrics and dynamics errors using embedded intelligence, and secondly, an alternative polishing method called selective polishing (SP). This systematic process comprehends measurement tools and algorithm resources. Phenomena occurred in the machine structure, due to interaction between the cutting tools and the petrous materials in the grinding and polishing processes are modeled mathematically. Using validated flatness models, the variables and parameters were discretized to determine the errors with respect to the Z axis. To validate the method, a test machine of 3m(2) workspace with a multi-body lightweight structure design was built. The geometrical errors were determined using precision instruments and those were compared with a pattern surface. A higher flatness is achieved through a combined grinding-traditional polishing and selective polishing process using the same machine. This method saves time and energy consumption.Ítem Modelling 3D metal cutting problems with the particle finite element method(Springer Verlag, 2020-01-01) Carbonell, J.M.; Rodríguez, J.M.; Oñate, E.; Carbonell, J.M.; Rodríguez, J.M.; Oñate, E.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecatrónica y Diseño de MáquinasThis work presents the development of the Particle Finite Element Method (PFEM) for the modelling of 3D solid mechanics problems under cutting conditions. The study and analysis of numerical models reproducing the cut of a material is a matter of interest in several areas; namely, the improvement of the material properties, the optimization of the process and tool geometries and the prediction of unexpected failures. The analysis of bi-dimensional (2D) models is the most common approach for different reasons. Just focusing on the simulation point of view, it is the simplest procedure, the cheapest in terms of computational cost and sometimes the only feasible numerical solution. However, many industrial machining processes, such as cutting, blanking, milling and drilling have not a possible simplification to 2D models. Actually even a simple turning processes for non-orthogonal cuts can not be simplified to 2D. This work present an upgrade of the PFEM techniques in order to deal with the 3D machining problems. We present recent improvements in the finite element formulation, the meshing re-connections and the contact detection. By applying these developments the PFEM has the capability for modelling a wide range of practical machining processes. In this paper the capacity of the formulation and the accuracy of the results are analyzed and validated with some representative examples. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.Ítem Numerical design method for CVT supported in standard variable speed rubber V-belts(Universitatea Politehnica Bucuresti, 2020-01-01) Arango I.; Alzate S.M.; Arango I.; Alzate S.M.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecatrónica y Diseño de MáquinasThe design of a V-belt continuously variable transmission (CVT) system is a complex problem due to the multiple interactions between components during its operation. Literature on CVT system design methods is scarce, and the vast majority of works include implicit equations that hinder applications at a basic design level. This research aims to introduce a numerical CVT design method for electric vehicles (EV) and internal combustion engine (ICE) vehicles considering each one of their components and using mechanical centrifugal actuators and a rubber V-belt. This design method is based on user needs, for which there are three main requirements: road specifications, vehicle characteristics, and expected performance. This method is focused on a transmission for a vehicle traveling on the same route constantly, such as public transport vehicles. From three-wheelers to medium cargo vehicles, there is a greatly diverse range of potential applications for using this method for each type of standard rubber V-belt. © 2020 by the authors.Ítem A new mechatronics laboratory for technology integration(Springer-Verlag France, 2017-02-01) Velasquez-Lopez, Alejandro; Rodriguez-Garcia, Alberto; Velasquez-Lopez, Alejandro; Rodriguez-Garcia, Alberto; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecatrónica y Diseño de MáquinasWhile teams and projects tend to be multi-domain, the infrastructure required to integrate and build prototypes lags behind to allow an efficient interaction and to offer multi-disciplinary facilities. Hence this paper presents an infrastructure approach developed in a Latin American academic context, where the concept of an Engineering Building is explained in order to support the demands of a 3rd Generation University. A deeper emphasis of this article is placed upon the development of a Technology Integration Laboratory in terms of functionality, capacity, adjacencies, furnishing and, physiologic and psicologic support. The layout design is based on the concepts of Mechatronics and Technical Systems while enhancing a teaching–learning-building process. After 5 years of operation the results obtained in terms of prototyping, filed patents and projects with the triad government-industry-academy are discussed. Our experience shows that such hands-on engineering facilities are worth having, especially within a virtual education growing trend, and that openness has influenced an increment of the Intellectual Property results. © 2015, Springer-Verlag France.Ítem Investment strategies in the Latin American agri-business sub-sectors of agricultural commodities, biofuels and meat chains(Emerald Group Publishing Ltd., 2018-01-01) Saravia-Matus, S.; Saravia Matus, J.; Sotomayor, O.; Rodriguez, A.; Saravia-Matus, S.; Saravia Matus, J.; Sotomayor, O.; Rodriguez, A.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecatrónica y Diseño de MáquinasPurpose The purpose of this paper is to review and examine the recent investment trends of firms operating in the food, feed and biofuel production and processing sectors in Latin America. The inter-related nature of these three sub-sectors and the great expansion they have gone through in the last decade showcases a series of socioeconomic and environmental policy challenges thus making it relevant to identify their different business models through a typology. Design/methodology/approach The paper first presents an unprecedented literature review based on field observations and media coverage of agri-business strategies of the food, feed and biofuel production in the region. It then moves to an in-depth analysis of investment operations that serve to classify such firms into a business model typology considering degree of internationalization and integration. The typology is a useful mechanism to enhance public policy analysis and uncover market or government incentives behind business decisions. Findings By focusing on investment strategies, the paper illustrates how both market and government incentives shape and affect the performance and consolidation of different players in the food, feed and biofuel sub-sectors in Latin America. The resulting effects have strong economic as well as social and environmental implications because such economic activities have an impact on global food and energy security. Research limitations/implications Limitations include a reliance on largely qualitative evidence and research methods due to unavailability of consistent numerical data in these specific agri-business sub-sectors. Originality/value This paper is unique in its focus on business models in a particularly relevant set of agri-business sub-sectors in Latin America and its implications to promote investment and innovation in value chain development while considering regional-specific challenges.Ítem E-bikes for steep roads: Mid drive and hub drive motor efficiency comparison(Inderscience Enterprises Ltd., 2018-01-01) Arango, I.; Godoy, A.; Lopez, C.; Arango, I.; Godoy, A.; Lopez, C.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecatrónica y Diseño de MáquinasPower input, speed, and efficiency concern people when selecting a transportation means. This study compares multiple e-bikes configurations and presents to the reader scientific criteria to choose the one that fits best for non-trained cyclists, who want to use e-bikes for everyday transportation in cities with steep roads, assuring that the cyclist takes effective part of the power input. Power development, speeds, energy consumption and efficiency result from a mathematical model and experimental data. Configurations vary in motor placement, assistance level, cyclist cadence, wheel type and transmission sets. Results indicate that the motor's placement is the most determining factor in the efficiency of the entire system. Placing the motor in the bottom bracket, allows both the cyclist and the motor to range in the most efficient rpm. As efficiency for the middle drive motor is higher than the hub drive motor, energy consumption in the hub drive motor is 18% higher. Copyright © 2018 Inderscience Enterprises Ltd.Ítem Pedagogical analysis of the 3D selfconstructor in dynamic systems simulation Análisis pedagógico del auto-constructor 3D en simulación dinámica de sistemas(Revista Espacios, 2019-12-28) Arango, Ivan; Herrera, Alejandro; Arango, Ivan; Herrera, Alejandro; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecatrónica y Diseño de Máquinas