RT Journal Article
T1 Some observations on short fatigue cracks under biaxial fatigue
A1 García-González, Antonio Luis
A1 López-Crespo, Pablo
A1 Moreno-Morales, María Belén
A1 Zapatero-Arenzana, José Arturo
K1 Materiales - Fatiga
AB This work presents a new methodology for evaluating crack initiation under biaxial conditions. The methodology consists of evaluating a number of crack parameters automatically with digital processing of high-magnification images of the crack. Five different strain conditions were evaluated on a low carbon ferritic–pearlitic steel specimen with tubular shape. A hole of 150 lm diameter was drilled to enforce the crack to initiate at a particular spot. Different combinations of axial and torsional strains were analysed during the initiation stage of the crack. Fatigue crack propagation curves clearly showed oscillations due to microstructure. It was also observed that these oscillations decreased as the torsional component of the strain was increased. Driving force was also evaluated in crack opening and sliding direction through crack opening displacement and crack sliding displacement. The results demonstrate that crack opening displacement is sensitive to microstructural barriers and crack sliding displacement is sensitive to crack deviations caused by the microstructure.
PB Elsevier
YR 2015
FD 2015-08-15
LK https://hdl.handle.net/10630/30344
UL https://hdl.handle.net/10630/30344
LA eng
NO P. Lopez-Crespo, A. Garcia-Gonzalez, B. Moreno, A. Lopez-Moreno, J. Zapatero, Some observations on short fatigue cracks under biaxial fatigue, Theoretical and Applied Fracture Mechanics, Volume 80, Part A, 2015, Pages 96-103, ISSN 0167-8442, https://doi.org/10.1016/j.tafmec.2015.05.004
NO Título del Proyecto: Estudio tridimensional de grietas de fatiga: correlaciones de imágenes, tomografía, difracción de rayos X y modelado con elementos FinitosReferencia: TEP-3244Entidad Financiadora: Junta de Andalucía (Proyecto de Excelencia)
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026