caa a22 4500 467949875 CHVBK 20180405193741.0 cr unu---uuuuu 170328e20040301xx s 000 0 eng 10.1007/s11003-005-0032-y doi (NATIONALLICENCE)springer-10.1007/s11003-005-0032-y (NATIONALLICENCE)springer-10.1007/s11003-005-0001-5 Pitting formation under the conditions of fretting fatigue [Elektronische Daten] [O. Datsyshyn, O. Kalakhan, V. Kadyra, R. Shchur] On the basis of a numerical-analytic model used for the analysis of durability and fracture of bodies whose contact occurs under the conditions of fretting fatigue, we predict and study the process of pitting formation in these bodies. It is assumed that pitting is initiated by a surface macrocrack formed in the contact region somewhat earlier and propagating as a result of its filling and wedging by the products of fretting. It is also assumed that the crack propagates according to the mode-I mechanism. On the basis of the analysis of the stress intensity factors, it is shown that surface cracks located near the boundaries of the contact region and oriented toward the unloaded surface of the body are most favorable for the development of pitting. The paths of propagation are constructed for cracks whose location is especially favorable for the formation of pitting. It is shown that the higher the pressure of the products of fretting upon the crack lips, and the smaller the angle made by the crack with the surface of the body, the faster the process of spalling of the surface (the paths turn to the boundary more sharply). The increase in the amplitude of the friction coefficient in contact cycles also intensifies the process of spalling. The theoretical results are in good agreement with the experimental data obtained for specimens made of TS-5 turbine titanium alloy and the well-known data of observations and conclusions made by Waterhouse. Springer Science+Business Media, Inc., 2004 Datsyshyn O. Karpenko Physicomechanical Institute, Ukrainian Academy of Sciences, Lviv aut Kalakhan O. Karpenko Physicomechanical Institute, Ukrainian Academy of Sciences, Lviv aut Kadyra V. Karpenko Physicomechanical Institute, Ukrainian Academy of Sciences, Lviv aut Shchur R. Karpenko Physicomechanical Institute, Ukrainian Academy of Sciences, Lviv aut Materials Science Kluwer Academic Publishers-Consultants Bureau 40/2(2004-03-01), 159-172 1068-820X 40:2<159 2004 40 11003 https://doi.org/10.1007/s11003-005-0032-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11003-005-0032-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Datsyshyn O. Karpenko Physicomechanical Institute, Ukrainian Academy of Sciences, Lviv aut NATIONALLICENCE 700 1- Kalakhan O. Karpenko Physicomechanical Institute, Ukrainian Academy of Sciences, Lviv aut NATIONALLICENCE 700 1- Kadyra V. Karpenko Physicomechanical Institute, Ukrainian Academy of Sciences, Lviv aut NATIONALLICENCE 700 1- Shchur R. Karpenko Physicomechanical Institute, Ukrainian Academy of Sciences, Lviv aut NATIONALLICENCE 773 0- Materials Science Kluwer Academic Publishers-Consultants Bureau 40/2(2004-03-01), 159-172 1068-820X 40:2<159 2004 40 11003 NATIONALLICENCE 856 40 https://doi.org/10.1007/s11003-005-0001-5 text/html Onlinezugriff via DOI Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE NATIONALLICENCE NL-springer