Browsing by Author "Cruchaga, Marcela A."
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- ItemAnalysis of Flow Past Oscillatory Cylinders Using a Finite Element Fixed Mesh Formulation(2017) González, Felipe A.; Cruchaga, Marcela A.; Celentano, Diego J.
- ItemAssessment of ductile failure models in single-pass wire drawing processes(2018) González V., Alvaro; Celentano, Diego J.; Cruchaga, Marcela A.
- ItemCharacterization of strain rate effects in sheet laser forming(2018) Castillo, Javier, I; Celentano, Diego J.; Cruchaga, Marcela A.; Garcia-Herrera, Claudio M.
- ItemExperimental and Numerical Analysis on the Formability of a Heat-Treated AA1100 Aluminum Alloy Sheet(2015) Durán, Alicia I.; Signorelli, Javier W.; Celentano, Diego J.; Cruchaga, Marcela A.; Francois, Manuel; Durán, Alicia I.; Signorelli, Javier W.; Celentano, Diego J.; Cruchaga, Marcela A.; Francois, Manuel
- ItemFinite element computation and experimental validation of sloshing in rectangular tanks(2013) Cruchaga, Marcela A.; Reinoso, Ricardo S.; Storti, Mario A.; Celentano, Diego J.; Tezduyar, Tayfun E.
- ItemIncidence of die spacing in the evolution of damage in two-pass wire drawing processes(2018) González V., Alvaro; Cruchaga, Marcela A.; Celentano, Diego J.
- ItemMechanical characterisation of the human thoracic descending aorta: experiments and modelling(TAYLOR & FRANCIS LTD, 2012) Garcia Herrera, Claudio M.; Celentano, Diego J.; Cruchaga, Marcela A.; Rojo, Francisco J.; Atienza, Jose Miguel; Guinea, Gustavo V.; Goicolea, Jose M.This work presents experiments and modelling aimed at characterising the passive mechanical behaviour of the human thoracic descending aorta. To this end, uniaxial tension and pressurisation tests on healthy samples corresponding to newborn, young and adult arteries are performed. Then, the tensile measurements are used to calibrate the material parameters of the Holzapfel constitutive model. This model is found to adequately adjust the material behaviour in a wide deformation range; in particular, it captures the progressive stiffness increase and the anisotropy due to the stretching of the collagen fibres. Finally, the assessment of these material parameters in the modelling of the pressurisation test is addressed. The implication of this study is the possibility to predict the mechanical response of the human thoracic descending aorta under generalised loading states like those that can occur in physiological conditions and/or in medical device applications.
- ItemSimulation and experimental validation of multiple-step wire drawing processes(ELSEVIER, 2009) Celentanoa, Diego J.; Palacios, Mauricio A.; Rojas, Ennio L.; Cruchaga, Marcela A.; Artigas, Alfredo A.; Monsalve, Alberto E.This paper presents an experimental analysis and a numerical simulation of the mechanical behaviour experienced by a steel rod during multiple-step wire cold-drawing processes. To this end, a set of tensile experiments is firstly carried out in order to characterise the material hardening evolution for different consecutive wire reductions. The experimental procedure also encompasses the measurement of drawing forces in a multiple-step process conducted at a laboratory scale under different drawing velocities. Then, this problem is simulated via a finite element formulation that accounts for both large viscoplastic strains and friction effects. The results obtained with the simulation are experimentally validated. Finally, the influence of specific operating conditions, such as the decrease of the number of wire reductions and the presence of back tension, on the material response during the whole process is numerically assessed. (C) 2008 Elsevier B. V. All rights reserved.
- ItemSimulation and experimental validation of the motion of immersed rigid bodies in viscous flows(ELSEVIER SCIENCE SA, 2008) Cruchaga, Marcela A.; Munoz, Christian M.; Celentano, Diego J.In this work we present the numerical analysis of the motion of a rigid body immersed in a viscous fluid. The fluid flow induced by the gravity-driven motion of a rigid body is particularly analysed using cylinders and spheres. The Navier-Stokes equations coupled with the interface motion are solved in the framework of a finite element formulation. The interface of the rigid body is represented using a moving Lagrangian interface technique (MLIT). The proposed formulation is applied to describe the two-dimensional motion of a cylinder between parallel walls as well as the axisymmetric representation of a sphere assessing in both cases the effects of the walls distance on the velocity developed by such bodies. The numerical predictions are verified using different models for the analysis of the problem, and are validated by comparison with theoretical-empirical correlations. Moreover, the computed body velocities are compared with experimental data reported in the literature as well as measurements obtained from experiments carried out in the framework of the present work. (C) 2008 Elsevier B.V. All rights reserved.