RT Journal Article
T1 Directions of high cycle fatigue cracks emanating from circular notches studied by optical profilometry
A1 Balbín Molina, José Antonio
A1 Chaves, V.
A1 Larrosa, N. O.
A1 Madrigal, C.
A1 Navarro, A.
AB Current models for predicting the fatigue endurance of notched solids use the stresses along a straight line, beginning at the notch root, as a simplification of the real crack propagation path. In this work, the experimental crack paths for hollow notched samples were analysed through different microscopy techniques, with the objective of establishing high cycle fatigue crack growth directions in a mild steel. Fully reversed tension–compression fatigue tests  of thin-walled tube specimens with a passing-through hole were carried out. The crack paths observed in the outer cylindrical surface were studied in each case, with special attention to the crack initiation point and the crack direction along the first grains. Moreover, the analysis of the fracture surfaces allowed the same analysis to be performed to determine the internal crack paths. It was observed that the crack initiation point was close to the maximum principal stress point at the hole contour as obtained from linear elastic finite element analysis, and the crack direction in its initiation was generally close to Mode I direction, contrary to the conventionally accepted 45 crack growth direction.
PB Elsevier
SN 0142-1123
SN 1879-3452 (electrónico)
YR 2022
FD 2022
LK https://hdl.handle.net/10272/21701
UL https://hdl.handle.net/10272/21701
LA eng
NO Balbín, J. A., Chaves, V., Larrosa, N. O., Madrigal, C., & Navarro, A. (2022). Directions of high cycle fatigue cracks emanating from circular notches studied by optical profilometry. In International Journal of Fatigue (Vol. 165, p. 107117). Elsevier BV. https://doi.org/10.1016/j.ijfatigue.2022.107117
NO The authors would like to thank the European Union, the SpanishGovernment and the Junta de Andalucía for its financial support throughgrantsDPI2017-84788-PandPID2020-117407GB-I00(FEDER/Ministeriode Ciencia e Innovación - Agencia Estatal de Investigación) and P18-FR-4306 (‘‘Fondo Europeo de Desarrollo Regional (FEDER) y Consejería deEconomía, Conocimiento, Empresas y Universidad de la Junta de Andalucía,dentro del Programa Operativo FEDER 2014-2020’’). N.O. Larrosawould also like to thank the UK Engineering and Physical SciencesResearch Council (EPSRC) for its financial support through grant numberEP/S012362/1.
DS Repositorio Institucional de la Universidad de Huelva
RD 14 jul 2026