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A Finite Fracture Mechanics approach to the asymptotic behaviour of U‐notched structures
Author(s) -
CARPINTERI A.,
CORNETTI P.,
SAPORA A.
Publication year - 2012
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/j.1460-2695.2011.01637.x
Subject(s) - fracture mechanics , stress intensity factor , fracture toughness , structural engineering , materials science , consistency (knowledge bases) , fracture (geology) , stress field , brittle fracture , mechanics , stress (linguistics) , radius , strain energy release rate , finite element method , mathematics , engineering , geometry , composite material , physics , computer science , linguistics , philosophy , computer security
ABSTRACT A Finite Fracture Mechanics (FFM) criterion is formalized to predict the critical failure loads of brittle U‐notched specimens, subjected to mode I loading. The criterion, recently applied to V‐notched structures, requires the contemporaneous fulfilment of stress requirements and energy conditions for fracture to propagate: the stress field ahead of the notch tip and the stress intensity factor related to a crack stemming from the root are involved. Both the apparent fracture toughness and the critical crack advancement result to be structural parameters. For sufficiently slender notches, the root radius becomes the only relevant geometric dimension. The consistency of the approach is proved by the comparison with experimental data available in the Literature.