Effect of size and configuration of 3-point bend bar specimens on J– R curves

Elastic–plastic fracture toughness of J Q values, crack opening displacement (COD) values for crack initiation and J resistance ( J– R) curves for crack extension of a 7075-T6 aluminum alloy were measured with 3-point bend bar specimens of different sizes. Width and the thickness of the specimens ra...

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Bibliographic Details
Published in:Journal of nuclear materials 1999-05, Vol.271 (1-3), p.87-91
Main Authors: Jitsukawa, Shiro, Naito, Akira, Segawa, Jun
Format: Article
Language:English
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Summary:Elastic–plastic fracture toughness of J Q values, crack opening displacement (COD) values for crack initiation and J resistance ( J– R) curves for crack extension of a 7075-T6 aluminum alloy were measured with 3-point bend bar specimens of different sizes. Width and the thickness of the specimens ranged from 1.25 to 20 mm. The a/ W also ranged from 0.125 to 0.5. J Q and COD values exhibited no appreciable change with specimen size and configuration, while the J range and crack extension increased with ligament size.
ISSN:0022-3115
1873-4820
DOI:10.1016/S0022-3115(98)00698-9