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Browsing by Author "González Rojas, Hernán Alberto"Més informacióMés informació

Now showing items 21-40 of 83

    • Electroplastic cutting influence on power consumption during drilling process 

      Hameed, Saqib; González Rojas, Hernán Alberto; Sánchez Egea, Antonio José; Nápoles Alberro, Amelia (2016-03-12)
      Article
      Open Access
      The aim of this study is to report the use of non-conventional material removal process technique. It was found that electropulses (EPs) assisted drilling process improves the material machinability based on the eletroplastic ...

    • Electropulsing effects on mechanical and metallurgical behavior of AISI-SAE 4140 steel 

      Montilla Montaña, Carlos A.; González Rojas, Hernán Alberto; Higuera Cobos, Oscar Fabián; Kallewaard, Valentina; Sánchez Egea, Antonio J (2018-10-02)
      Article
      Open Access
      The electroplasticity phenomenon (EP) produces changes in the mechanical properties of a metal, due to the simultaneous application of mechanical stresses of compression, bending, etc., and high instantaneous current pulses. ...

    • Estimation of specific cutting energy in an S235 alloy for multi-directional ultrasonic vibration-assisted machining using the Finite Element Method 

      Florez García, Luis Carlos; González Rojas, Hernán Alberto; Sánchez Egea, Antonio José (Multidisciplinary Digital Publishing Institute (MDPI), 2020-01-24)
      Article
      Open Access
      The objective of this work is to analyze the influence of the vibration-assisted turning process on the machinability of S235 carbon steel. During the experiments using this vibrational machining process, the vibrational ...

    • Estimation of the polishing time for different metallic alloys in surface texture removal 

      González Rojas, Hernán Alberto; Sánchez Egea, Antonio José; Travieso Rodríguez, José Antonio; Llumà Fuentes, Jordi; Jorba Peiró, Jordi (2018-01-29)
      Article
      Open Access
      The aim of this work is to propose a novel analytical model for predicting the polishing time and behavior of the surface texture removal in different metal alloys. The surface texture, resulting from a previous milling ...

    • Estudio de la variación de la rugosidad y la dureza superficial en piezas torneadas con asistencia de electroplasticidad 

      Montilla Montaña, Carlos; Sánchez Egea, Antonio José; González Rojas, Hernán Alberto; Kallewaard, Valentina (2014)
      Conference report
      Open Access
      Se presentan los resultados de un trabajo experimental destinado a determinar la variación de la rugosidad y la dureza superficial de algunos metales (aluminio 6061, latón SAE 41 y acero SAE 1020), al ser torneados en ...

    • Estudio del fenómeno de electroplasticidad atérmica en el comportamiento mecánico y metalúrgico del acero AISI-SAE 4140 ensayado a tracción 

      Montilla Montaña, Carlos A.; González Rojas, Hernán Alberto; Higuera Cobos, Oscar Fabián; Kallewaard, Valentina; Sánchez Egea, Antonio José (2018)
      Conference report
      Open Access
      El fenómeno de electroplasticidad (EP por sus siglas en inglés) consiste en el cambio de las propiedades mecánicas de un metal, debido a la aplicación simultánea de esfuerzos mecánicos de tracción, compresión, flexión, ...

    • Evaluation of oscillatory repetitive movements in Parkinson disease and Essential tremor: implications for physiopathology and differential diagnosis 

      Costa, João; González Rojas, Hernán Alberto; Valldeoriola, Francesc; Gaig, Carlos; Tolosa, Eduardo; Valls-Solé, Josep (2009-10-15)
      Article
      Restricted access - publisher's policy

    • Examen de re-evaluación (Curs 2020-2021) 

      González Rojas, Hernán Alberto (Universitat Politècnica de Catalunya, 2021-01-27)
      Exam
      Restricted access to the UPC academic community

    • Examen final 

      González Rojas, Hernán Alberto (Universitat Politècnica de Catalunya, 2023-01-12)
      Exam
      Restricted access to the UPC academic community

    • Examen final (Curs 2019-2020) 

      Magnusson Morer, Ingrid; González Rojas, Hernán Alberto (Universitat Politècnica de Catalunya, 2020-01-09)
      Exam
      Restricted access to the UPC academic community

    • Examen final (Curs 2020-2021) 

      González Rojas, Hernán Alberto (Universitat Politècnica de Catalunya, 2021-01-15)
      Exam
      Restricted access to the UPC academic community

    • Examen final (Curs 2020-2021) 

      González Rojas, Hernán Alberto (Universitat Politècnica de Catalunya, 2021-01-11)
      Exam
      Restricted access to the UPC academic community

    • Examen final (Curs 2021-2022) 

      González Rojas, Hernán Alberto (Universitat Politècnica de Catalunya, 2022-01-12)
      Exam
      Restricted access to the UPC academic community

    • Examen final (Curs 2022-2023) 

      González Rojas, Hernán Alberto; Magnusson Morer, Ingrid (Universitat Politècnica de Catalunya, 2023-06-15)
      Exam
      Restricted access to the UPC academic community

    • Examen final (Curs 2023-2024) 

      González Rojas, Hernán Alberto; Magnusson Morer, Ingrid (Universitat Politècnica de Catalunya, 2024-06-17)
      Exam
      Restricted access to the UPC academic community

    • Examen final [Curs 2015-2016] - Q2 

      Casariego Vales, Pedro; González Rojas, Hernán Alberto; López Membrilla, Dolores; Pérez Guindal, Elsa; Ruiz López, Juan Luis; Torras Sendra, M. Alba (Universitat Politècnica de Catalunya, 2016-06-23)
      Exam
      Restricted access to the UPC academic community

    • Examen final [Curs 2016-2017] - Q2 

      Ruiz López, Juan Luis; Pérez Guindal, Elsa; López Membrilla, Dolores; González Rojas, Hernán Alberto; Casariego Vales, Pedro; Torras Sendra, M. Alba (Universitat Politècnica de Catalunya, 2017-06-23)
      Exam
      Restricted access to the UPC academic community

    • Examen final [Curs 2018-2019] - Q2 

      González Rojas, Hernán Alberto (Universitat Politècnica de Catalunya, 2019-06-07)
      Exam
      Restricted access to the UPC academic community

    • Examen parcial 

      González Rojas, Hernán Alberto (Universitat Politècnica de Catalunya, 2022-10-26)
      Exam
      Restricted access to the UPC academic community

    • Examen parcial (Curs 2019-2020) 

      Magnusson Morer, Ingrid; González Rojas, Hernán Alberto (Universitat Politècnica de Catalunya, 2019-11-04)
      Exam
      Restricted access to the UPC academic community