Influence of Specimen Size on J-, Jm- and δ5-R-Curves for Side-Grooved Compact-Tension Specimens
- 1 January 1993
- book chapter
- Published by ASTM International
- p. 429-472
- https://doi.org/10.1520/stp18040s
Abstract
The influence of specimen size and geometry on R-curves has been studied for a pressure vessel steel and an aluminum alloy using side-grooved compact-tension specimens. The specimen thickness reduction (necking) was used to quantify changes of constraint in laboratory specimens. The results show that the crack tip opening displacement, δ5, and the modified J-integral Jm, can correlate significantly more stable crack growth than the conventional J-integral.Keywords
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