Examinando por Autor "Boulanger, Pierre"
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Ítem CFD Analysis of the Effect on Buoyancy Due to Terrain Temperature Based on an Integrated DEM and Landsat Infrared Imagery(Universidad EAFIT, 2008-12-01) García, Manuel Julio; Boulanger, Pierre; Duque, Juan; Giraldo, Santiago; EAFIT University; University of Alberta; EAFIT University; EAFIT UniversityÍtem Inverse-FEM Characterization of a Brain Tissue Phantom to Simulate Compression and Indentation(Universidad EAFIT, 2012-12-01) Mesa-Múnera, Elizabeth; Ramírez–Salazar, Juan F; Boulanger, Pierre; W Branch, John; Universidad Nacional de Colombia; Universidad Nacional de Colombia; University of Alberta; Universidad Nacional de ColombiaÍtem Poster: Collaborative data exploration using two navigation strategies(IEEE COMPUTER SOC, 2009-01-01) Gomez, Omar; Trefftz, Helmuth; Boulanger, Pierre; Bischof, Walter F.; Universidad EAFIT. Departamento de Ingeniería de Sistemas; I+D+I en Tecnologías de la Información y las ComunicacionesVirtual collaborative systems are vital tools for accessing and sharing scientific data visualizations. This paper shows how two different modes of collaboration can affect user performance in a specific exploration task. Experiments with groups of users that are working in pairs showed that the lack of mobility can affect the ability to achieve specific exploration goals in a virtual environment. Our analysis reveals that the task was completed more efficiently when users were allowed to move freely and independently instead of working with limited mobility. In these systems, users adapted their own abilities and minimized theeffect of mobility restrictions. ©2009 IEEE.Ítem Spring-particle model for hyperelastic cloth(UNIV NAC COLOMBIA, FAC NAC MINAS, 2007-03-01) Garcia, Manuel; Gomez, Mario; Ruiz, Oscar; Boulanger, Pierre; Mecánica AplicadaThis article presents a computational model to simulate the deformation of hyperelastic fabrics. The model is based on a spring-particle approach and it simulates the interaction of a textile tissue with a forming body. The fabric is represented by rectangular meshes of springs. This fact enables the model to behave orthotropically and therefore it is possible to simulate the warp and weft properties. The constitutive relations preserve the natural hyperelastic capabilities of the cloth. In the model developed herein, initially the cloth lies in its relaxed un-deformed state. Then it is given an initial deformation that guarantees no contact nor intersection with the forming rigid body. Finally, the deformed cloth is realised, and moves iteratively towards an equilibrium location. The final equilibrium location is reached when the internal forces are balanced by the external contact forces caused by the rigid object. This is achieved when the stop criterion has been satisfied.Ítem Spring–particle model for hyperelastic cloth(2005-05) García, Manuel; Gómez, Mario; Ruíz, Óscar; Boulanger, Pierre; Universidad EAFIT. Departamento de Ingeniería Mecánica; Laboratorio CAD/CAM/CAEThis article presents a computational model to simulate the deformation of hyperelastic fabrics -- The model is based on a spring−particle approach and it simulates the interaction of a textile tissue with a forming body -- The fabric is represented by rectangular meshes of springs -- This fact enables the model to behave orthotropically and therefore it is possible to simulate the warp and weft properties -- The constitutive relations preserve the natural hyperelastic capabilities of the cloth -- In the model developed herein, initially the cloth lies in its relaxed un−deformed state -- Then it is given an initial deformation that guarantees no contact nor intersection with the forming rigid body -- Finally, the deformed cloth is realised, and moves iteratively towards an equilibrium location -- The final equilibrium location is reached when the internal forces are balanced by the external contact forces caused by the rigid object -- This is achieved when the stop criterion has been satisfiedÍtem Spring–particle model for hyperelastic cloth(Universidad Nacional de Colombia, 2007-03) García, Manuel; Gómez, Mario; Ruíz, Óscar; Boulanger, Pierre; Universidad EAFIT. Departamento de Ingeniería Mecánica; Laboratorio CAD/CAM/CAEEste artículo presenta un modelo computacional para la simulación de telas hiperelásticas -- El modelo propuesto tiene un enfoque multi−partículas y simula la interacción de un material textil con un objeto deformante -- La tela está representada por mallas rectangulares compuestas por resortes, este hecho permite al modelo comportarse ortotrópicamente y en consecuencia es posible simular sus propiedades en ambos sentidos -- Las relaciones constitutivas del material preservan las capacidades hiperelásticas naturales de la tela -- En el modelo desarrollado aquí, inicialmente la tela se encuentra en su estado natural no deformado -- Luego se le da una deformación inicial que garantice el no contacto o intersección con el objeto deformante -- Finalmente, la tela deformada es liberada, en consecuencia ella comienza a moverse iterativamente hacia a una posición de equilibrio -- La posición final de equilibrio es alcanzada cuando las fuerzas internas son balanceadas por las fuerzas externas de contacto causadas por el objeto -- Esto se logra cuando el criterio de parada ha sido satisfecho