1. Department of Mechanical Engineering, Universidad de Concepción, Ciudad Universitaria, Concepción, Chile
2. Department of Materials Engineering (DIMAT), Faculty of Engineering, University of Concepcion, Concepción, Chile
3. Department of Mechanical Engineering, Faculty of Engineering, Universidad Del Bío Bío, Concepción, Chile
4. Department of Mechanical Engineering, Universidad de La Frontera, Temuco, Chile