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Quantitative evaluation of the displacement distribution and stress intensity factor of fatigue cracks healed by a controlled high‐density electric current field
Author(s) -
Hosoi A.,
Yano T.,
Morita Y.,
Ju Y.
Publication year - 2014
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.12175
Subject(s) - stress intensity factor , materials science , stress concentration , displacement (psychology) , crack closure , intensity (physics) , structural engineering , electric displacement field , current density , composite material , bridging (networking) , electric field , crack tip opening displacement , current (fluid) , stress (linguistics) , fracture mechanics , engineering , optics , electrical engineering , computer science , physics , quantum mechanics , piezoelectricity , psychotherapist , psychology , computer network , linguistics , philosophy
Fatigue cracks were healed by controlling a high‐density electric current. The changes in the displacement distribution around the crack tip and the stress intensity factor before and after crack healing were evaluated quantitatively with a digital image collation method. According to the results, it was determined that the cracks were closed by approximately 2 to 7 µm in this study. On the other hand, the stress intensity factor decreased or increased depending on the conditions of the crack and the current applied. The physical restriction between the crack surfaces, such as bridging, is important with respect to lowering the stress intensity factor after healing.