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Comparison of dynamic initiation toughness measured by strain gauges and the shadow optical method
Author(s) -
Hermann R.,
MacGillivray H. J.,
Dear J.P.
Publication year - 1993
Publication title -
strain
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.477
H-Index - 47
eISSN - 1475-1305
pISSN - 0039-2103
DOI - 10.1111/j.1475-1305.1993.tb00840.x
Subject(s) - charpy impact test , materials science , fracture toughness , deformation (meteorology) , stress intensity factor , strain gauge , transient (computer programming) , dynamic stress , composite material , shadow (psychology) , fracture (geology) , structural engineering , fracture mechanics , strain (injury) , stress (linguistics) , toughness , dynamic loading , engineering , computer science , medicine , psychology , linguistics , philosophy , psychotherapist , operating system
The deformation and fracture behaviour in dynamically loaded Charpy specimens of BS11 rail steel were studied by two different measuring techniques. The transient records obtained from straingauges were compared with results obtained simultaneously by the shadowoptical method. Good agreement was obtained when measuring and comparing the stress intensity factor K in the initial stages of deformation behaviour prior to crack initiation. During fast fracture, the shadow optical method indicated the influence of dynamic effects on crack propagation.