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ASTM E561 PDF
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Standard Test Method for KR Curve Determination
| Published by | Publication Date | Number of Pages |
| ASTM | 12/01/2021 | 18 |
ASTM E561 – Standard Test Method for KR Curve Determination
1.1 This test method covers the determination of the resistance to fracture of metallic materials under Mode I loading at static rates using either of the following notched and precracked specimens: the middle-cracked tension M(T) specimen or the compact tension C(T) specimen. A KR curve is a continuous record of toughness development (resistance to crack extension) in terms of KR plotted against crack extension in the specimen as a crack is driven under an increasing stress intensity factor, K. (1)2
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