Some observations on short fatigue cracks under biaxial fatigue
作者： P. Lopez-Crespo , A. Garcia-Gonzalez , B. Moreno , A. Lopez-Moreno , J. Zapatero
DOI: 10.1016/J.TAFMEC.2015.05.004
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摘要: Abstract This work presents a new methodology for evaluating crack initiation under biaxial conditions. The consists of number parameters automatically with digital processing high-magnification images the crack. Five different strain conditions were evaluated on low carbon ferritic–pearlitic steel specimen tubular shape. A hole 150 μm diameter was drilled to enforce initiate at particular spot. Different combinations axial and torsional strains analysed during stage Fatigue propagation curves clearly showed oscillations due microstructure. It also observed that these decreased as component increased. Driving force in opening sliding direction through displacement displacement. results demonstrate is sensitive microstructural barriers deviations caused by
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