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THE EFFECT OF SPECIMEN SIZE ON THE J R‐CURVE BEHAVIOUR OF A TITANIUM ALLOY
Author(s) -
Gordon J. R.,
Jones R. L.
Publication year - 1989
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.1460-2695.1989.tb00538.x
Subject(s) - materials science , alloy , fracture (geology) , titanium alloy , enhanced data rates for gsm evolution , composite material , fracture mechanics , crack growth resistance curve , metallurgy , structural engineering , crack closure , engineering , telecommunications
— —This paper presents preliminary results from a large experimental programme to study geometry and size effects in J R‐curves, The results presented were obtained from unloading compliance R‐curve tests performed at room temperature on different sized single‐edge‐notch‐bend specimens made from Ti‐3Al–2V alloy. The crack growth resistance was measured in terms of the standard fracture resistance J (i.e. not corrected for crack growth), J corrected for crack growth, and the J modified parameter proposed by Ernst. It was found that the best agreement was exhibited by the R‐curves based on the standard fracture resistance J , which displayed reasonable size independence up to, and in many cases beyond crack growths corresponding to 50% of the initial uncracked ligament.