Universidad de Concepción Facultad de Ingeniería

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Canales Cárdenas Cristian Alexis

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  • 56 41 220 3545
  • Oficina 334 Edificio Central Facultad de Ingeniería

Sobre Canales Cárdenas Cristian Alexis

Ingeniero Civil Mecánico - UDEC 

[C] Docteur en Sciences Appliquées. Universitè de Liège, Bélgica.

Publicaciones

Application of uncoupled damage models to predict ductile fracture in sheet metal blanking. (2017), The use of uncoupled damage models has been widely used over the years for the prediction of ductile fracture in engineering applications. Nevertheless, its applicability in the prediction of failure has been shown to be limited in the wide range of loading conditions encountered in different manufacturing processes. In order to enhance the formulation of former damage models, the Lode angle has been recently used to characterize the stress states along with the stress triaxiality. This new family of damage models has been demonstrated to give excellent results when proportional loading paths are considered, but its efficiency in more complex applications still need further analysis. To this end, a comparative study of former and recently developed uncoupled damage models is performed in this work. The identification of material parameters is done considering simple mechanical tests under different conditions. Then, the models are used to predict the onset and propagation of cracks during blanking, where numerical predictions are compared with experimental results. Finally, the selected damage models presented a remarkable overall performance in the range of clearances under study. https://doi.org/10.4028/www.scientific.net/KEM.725.483

On the numerical simulation of sheet metal blanking process (2017), The use of the blanking process has been widely spread in mass production industries. In this technique, the quality of the final product is directly related to the setting parameters of the process and the material response of the sheet. In the present work, a general framework based on the finite element method for the simulation of the sheet metal blanking process is presented. The proposed approach properly addresses all the numerical challenges related to blanking. First, an extension of elasto-viscoplastic constitutive equations for the large strain regime is used to take into account the material strain-rate sensitivity. Then, the inertial effects coming from high velocity operations are considered by means of an implicit time integration scheme. Moreover, the frictional contact interactions are simulated with the classical Coulomb law and an energetically consistent formulation of area regularization. Finally, ductile fracture is modeled thanks to the element deletion method coupled with a fracture criterion. The blanking process is then simulated for different setting parameters. The accuracy of this approach is evaluated by comparing the numerical predictions to experimental results for both quasi-static and dynamic conditions. Good agreement is found between experimental and numerical results for all cases.

Monitoring of rotor-stator interaction in pump-turbine using vibrations measured with on-board sensors rotating with shaft (2014), Shock and Vibration 24 (2014), 1-8, Article ID 276796

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