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Two measurement techniques for determining effective stress intensity factors
Author(s) -
Wong S. L.,
Bold P. E.,
Brown M. W.,
Allen R. J.
Publication year - 2000
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 - 10.1046/j.1460-2695.2000.00341.x
Subject(s) - stress intensity factor , strain gauge , replica , materials science , range (aeronautics) , mode (computer interface) , crack closure , structural engineering , closure (psychology) , intensity (physics) , stress (linguistics) , composite material , mechanics , optics , fracture mechanics , engineering , physics , computer science , market economy , art , visual arts , linguistics , philosophy , economics , operating system
Two methods were studied for determining crack closure and locking effects under combinations of mixed mode I and II loading, namely the strain gauge and the surface replica methods. They demonstrated that strain gauges are able to detect the mode I crack closure but not mode II crack locking. As an alternative, the surface replica method is suggested as a practical technique for measuring mode II crack locking effects. The effective mode II stress intensity factor range can be estimated by comparison of the actual measured sliding range between a pair of crack faces and the theoretical sliding range.