Surface failures of plastically deformed rolling disks
Feberwee, Jan Johan
Merwin, John E.
Master of Science
Surface failures have been frequently observed in materials under conditions of cyclic rolling contact. The fatigue results from cumulative plastic deformation in a specific direction. Using the approximate theory established by Merwin and Johnson for a simplified model, an effort has been made to give certain predictions for the life to failure. Various quantities were taken into consideration as possible criteria for failure. The theoretical results were compared with experimental data. However, an insufficient number of experiments were performed to draw reliable conclusions from these data. The theoretical values did not give good agreement with an experimental law established by Palmgren. It was felt that for proper interpretation of the experimental data, several quantities' as for example the contact width, need to be measured which at this stage of the project was impossible.