A Comparison of CMOD-Based CTOD and J-Conversion CTOD in Shallow Crack Specimens
The ratio of J-conversion CTOD to CMOD-based CTOD was experimentally evaluated and analytically estimated in shallow crack specimens. It was demonstrated that the low strain hardening exponent in the Ramberg-Osgood relation reduced the CTOD ratio. A CTOD transformation equation, which was proposed by the authors, can transform CMOD-based CTOD into J-conversion CTOD with reasonable accuracy for 0.15≤a/W≤0.5.
A. Saimoto and M.H. Aliabadi
Y. Kayamori et al., "A Comparison of CMOD-Based CTOD and J-Conversion CTOD in Shallow Crack Specimens", Key Engineering Materials, Vols. 452-453, pp. 769-772, 2011