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Neutron and synchrotron X-ray diffraction for understanding crack tip mechanics
dc.contributor.author | Kelleher, J F | |
dc.date.accessioned | 2019-05-02T07:20:40Z | |
dc.date.available | 2019-05-02T07:20:40Z | |
dc.date.created | 2019 | |
dc.date.issued | 2019-05-02 | |
dc.identifier.uri | https://hdl.handle.net/10630/17597 | |
dc.description | Conferencia invitada de Joseph F Kelleher | en_US |
dc.description.abstract | The fatigue behaviour of polycrystalline metals is often studied through crack propagation analysis [1,2]. Nevertheless, understanding the mechanical processes that take place right at the crack tip [3,4] would also involve considering the deformation developing at the plastic zone and the contact between the crack faces over a portion of the loading cycle [5–7]. Paris law or newer models such as Forman equation are commonly used to interpret growth data [8], but cannot be used to generalise for complex loading scenarios, such as multiaxial loads [9–11] or variable amplitude loads [2]. Diffraction methods are a powerful tool to characterise crack tip strains and stresses [12]. The basics principles of neutron and synchrotron diffraction for measuring bulk properties are discussed [13,14], with special emphasis on grain size effects [15,16], transition between plane stress and plain strain conditions [17], measurement of the plastic zone and development of shielding effects at the crack tip [18]. REFERENCES [1] P. Lopez-Crespo, P.J. Withers, F. Yusof, H. Dai, A. Steuwer, J.F. Kelleher, T. Buslaps, Overload effects on fatigue crack-tip fields under plane stress conditions: surface and bulk analysis, Fatigue and Fracture of Engineering Materials and Structures. 36 (2013) 75–84. [2] B. Moreno, A. Martin, P. Lopez-Crespo, J. Zapatero, J. Dominguez, Estimations of fatigue life and variability under random loading in aluminum Al-2024T351 using strip yield models from NASGRO, International Journal of Fatigue. 91 (2016) 414–422. [3] C. Bathias, Retrospective view on the role of the plastic zone at a fatigue crack tip, Fatigue and Fracture of Engineering Materials and Structures. 19 (1996) 1301–1306. [4] P. Lopez-Crespo, D. Camas, F. V Antunes, J.R. Yates, A study of the evolution of crack tip plasticity along a crack front, Theoretical and Applied Fracture Mechanics. 98 (2018) 59–66. | en_US |
dc.description.sponsorship | Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. Departamento de Ingeniería Civil, de Materiales y Fabricación | en_US |
dc.language.iso | eng | en_US |
dc.rights | info:eu-repo/semantics/openAccess | en_US |
dc.subject | Materiales | en_US |
dc.subject.other | structural integrity | en_US |
dc.subject.other | residual stress measurement | en_US |
dc.subject.other | synchrotron radiation | en_US |
dc.subject.other | neutron diffraction | en_US |
dc.subject.other | x-ray diffraction | en_US |
dc.title | Neutron and synchrotron X-ray diffraction for understanding crack tip mechanics | en_US |
dc.title.alternative | Difracción de rayos X y difracción de neutrones en estudios de fatiga y fractura de materiales | en_US |
dc.type | info:eu-repo/semantics/conferenceObject | en_US |
dc.centro | Escuela de Ingenierías Industriales | en_US |
dc.relation.eventtitle | Conferencias de la Escuela de Ingenierías Industriales | en_US |
dc.relation.eventplace | Málaga, España | en_US |
dc.relation.eventdate | 24/01/2019 | en_US |