On the Role of Contact and System Stiffness in the Measurement of Principal Variables in Fretting Wear Testing
Diego Infante-García,
Miguel Marco,
Alaitz Zabala,
Farshad Abbasi,
Eugenio Giner,
Iñigo Llavori
Affiliations
Diego Infante-García
Department of Mechanical Engineering, Universidad Carlos III de Madrid, Avda. de la Universidad 30, 28911 Leganés, Madrid, Spain
Miguel Marco
Department of Mechanical Engineering, Universidad Carlos III de Madrid, Avda. de la Universidad 30, 28911 Leganés, Madrid, Spain
Alaitz Zabala
Surface Technologies, Mondragon University, Loramendi 4, 20500 Arrasate-Mondragon, Gipuzkoa, Spain
Farshad Abbasi
Advanced Material Processes Research Group, Department of Mechanical and Industrial Production, Mondragon University, Loramendi 4, 20500 Arrasate-Mondragon, Gipuzkoa, Spain
Eugenio Giner
Centre of Research in Mechanical Engineering—CIIM, Department of Mechanical and Materials Engineering, Universitat Politècnica de València, Camino de Vera, 46022 Valencia, Spain
Iñigo Llavori
Surface Technologies, Mondragon University, Loramendi 4, 20500 Arrasate-Mondragon, Gipuzkoa, Spain
In this work, the role of the contact stiffness in the measurement of principal variables in fretting wear tests is assessed. Several fretting wear tribometers found in the literature, including one developed by the authors, are analysed and modelled using numerical methods. The results show the importance of the tribosystem stiffness and tangential contact stiffness in the displacement sensor calibration and in the correct numerical modelling of fretting wear tests, especially for flat-to-flat contact configuration. The study highlights that, in most cases, direct comparisons between fretting results with severe wear obtained with different tribometers cannot be performed if the contact stiffness is not properly considered during the development of the experiments.
