Physics – Condensed Matter – Materials Science
Scientific paper
2005-04-20
Physics
Condensed Matter
Materials Science
30 pages, 8 figures, to appear in Physica A
Scientific paper
This paper investigates correlation properties of fluctuations in fatigue crack growth of polycrystalline materials, such as ductile alloys, that are commonly encountered in structures and machinery components of complex electromechanical systems. The model of crack damage measure indicates that the fluctuations of fatigue crack growth are characterized by strong correlation patterns within short time scales and are uncorrelated for larger time scales. The two correlation regimes suggest that the 7075-T6 aluminum alloy, analyzed in this paper, is characterized by a micro-structure which is responsible for an intermittent correlated dynamics of fatigue crack growth within a certain scale. The constitutive equations of the damage measure are built upon the physics of fracture mechanics and are substantiated by Karhunen-Lo\`{e}ve decomposition of fatigue test data. Statistical orthogonality of the estimated damage measure and the resulting estimation error is demonstrated in a Hilbert space setting.
Ray Asok
Scafetta Nicola
West Bruce J.
No associations
LandOfFree
Correlation regimes in fluctuations of fatigue crack growth does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Correlation regimes in fluctuations of fatigue crack growth, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Correlation regimes in fluctuations of fatigue crack growth will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-314872