- Email: [email protected]
From microstructure to design: Advances in fatigue of metals
International Journal of Fatigue 83 (2016) 1
Contents lists available at ScienceDirect
International Journal of Fatigue journal homepage: www.elsevier.com/locate/ijfatigue
Guest editorial
From microstructure to design: Advances in fatigue of metals Mechanical failures due to fatigue have been the subject of engineering efforts for more than 150 years. Up to now, fatigue failures continue to be a major concern in engineering design and the economic cost of fracture and its prevention is still extremely high. Since metals are still today widely used in the design of the majority of parts and structures carrying in service highest loads, the study of fatigue phenomena is particularly addressed to them. Even if has been extensively studied fatigue of metals is far from being completely understood. Fatigue damage represents, in fact, one of the most intricate types of the damage to which structural materials are subjected in service and can result in abrupt fracture. Several approaches have been proposed, in literature. Between them the three most important are: the traditional stress-based approach, based on the calculation of the nominal stresses, the strain-based approach, that involves more detailed analysis of the local strain and stress values and the fracture-mechanics-based approach, that considers the growth of real cracks and defects. These approaches allow studying the fatigue from different points of view, involving the average and the local values of stresses and strains, the presence of cracks and defects, macro and micro-analyses. The aim is always the prevention of fatigue failure in designing machines, vehicles and structures that are subjected to repeated loading or vibration. The international Colloquia on Mechanical Fatigue of Metals aim at facilitating and encouraging the exchange of knowledge and experience among different communities, involved in both basic and applied research in this field, looking at the problem of fatigue both from a microscopic and an applicative and design point of view.
http://dx.doi.org/10.1016/j.ijfatigue.2015.11.006 0142-1123/Ó 2015 Published by Elsevier Ltd.
The first truly international Colloquium on Mechanical Fatigue of Metals has been organized in Brno, Czech Republic during Prague Spring in 1968. Regular Colloquia on Mechanical Fatigue of Metals started in 1972 also in Brno and were originally limited to participants from the countries of former ‘‘Eastern block”. They continued until the 12th Colloquium in 1994 (Miskolc, HU) with two years period. After a break twelve years long, the Colloquia restarted in 2006 (Ternopil, Ukraine) followed by one in 2008 (Varna, Bulgaria), in 2010 (Opole, Poland) and in 2012 (Brno, CZ). XVII International Colloquium Mechanical Fatigue of Metals (XVII ICFM) was organized for the first time in Italy, one of the countries of the former European ‘‘Western block”, and open to participants from all countries interested in the subject of fatigue of metallic materials. This Special Issue aims at publishing a few papers selected, by a strict peer review, among the ones presented at the XVII ICFM. We would like to thank all the authors for their important contribution and all the reviewers for their efforts, that are fundamental in the dissemination of the scientific knowing. Thanks to prof. N.M. James and David McDowell, the editors of this international journal, which supported this Special Issue. Finally, we hope that the exigent readers of the International Journal of Fatigue will appreciate this Special Issue and its papers. Laura Vergani Mario Guagliano Mechanical Engineering Department, Politecnico di Milano, Italy
Contents lists available at ScienceDirect
International Journal of Fatigue journal homepage: www.elsevier.com/locate/ijfatigue
Guest editorial
From microstructure to design: Advances in fatigue of metals Mechanical failures due to fatigue have been the subject of engineering efforts for more than 150 years. Up to now, fatigue failures continue to be a major concern in engineering design and the economic cost of fracture and its prevention is still extremely high. Since metals are still today widely used in the design of the majority of parts and structures carrying in service highest loads, the study of fatigue phenomena is particularly addressed to them. Even if has been extensively studied fatigue of metals is far from being completely understood. Fatigue damage represents, in fact, one of the most intricate types of the damage to which structural materials are subjected in service and can result in abrupt fracture. Several approaches have been proposed, in literature. Between them the three most important are: the traditional stress-based approach, based on the calculation of the nominal stresses, the strain-based approach, that involves more detailed analysis of the local strain and stress values and the fracture-mechanics-based approach, that considers the growth of real cracks and defects. These approaches allow studying the fatigue from different points of view, involving the average and the local values of stresses and strains, the presence of cracks and defects, macro and micro-analyses. The aim is always the prevention of fatigue failure in designing machines, vehicles and structures that are subjected to repeated loading or vibration. The international Colloquia on Mechanical Fatigue of Metals aim at facilitating and encouraging the exchange of knowledge and experience among different communities, involved in both basic and applied research in this field, looking at the problem of fatigue both from a microscopic and an applicative and design point of view.
http://dx.doi.org/10.1016/j.ijfatigue.2015.11.006 0142-1123/Ó 2015 Published by Elsevier Ltd.
The first truly international Colloquium on Mechanical Fatigue of Metals has been organized in Brno, Czech Republic during Prague Spring in 1968. Regular Colloquia on Mechanical Fatigue of Metals started in 1972 also in Brno and were originally limited to participants from the countries of former ‘‘Eastern block”. They continued until the 12th Colloquium in 1994 (Miskolc, HU) with two years period. After a break twelve years long, the Colloquia restarted in 2006 (Ternopil, Ukraine) followed by one in 2008 (Varna, Bulgaria), in 2010 (Opole, Poland) and in 2012 (Brno, CZ). XVII International Colloquium Mechanical Fatigue of Metals (XVII ICFM) was organized for the first time in Italy, one of the countries of the former European ‘‘Western block”, and open to participants from all countries interested in the subject of fatigue of metallic materials. This Special Issue aims at publishing a few papers selected, by a strict peer review, among the ones presented at the XVII ICFM. We would like to thank all the authors for their important contribution and all the reviewers for their efforts, that are fundamental in the dissemination of the scientific knowing. Thanks to prof. N.M. James and David McDowell, the editors of this international journal, which supported this Special Issue. Finally, we hope that the exigent readers of the International Journal of Fatigue will appreciate this Special Issue and its papers. Laura Vergani Mario Guagliano Mechanical Engineering Department, Politecnico di Milano, Italy