MEASURING FRACTURE TOUGHNESS WITH A CHEVRON-NOTCHED CRACK-ARREST SPECIMEN
Initiation toughness K sub Ic and arrest toughness K sub Ia are important properties because of their value for predicting structural performance in a fracture mechanics analysis. However, the current ASTM standard procedures for measuring K sub Ic (E399) and K sub Ia (E1221) specify tests that are...
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| Veröffentlicht in: | Experimental techniques (Westport, Conn.) Conn.), 1997-07, Vol.21 (4), p.31-36 |
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| creator | Bonenberger, R.J. |
| description | Initiation toughness K sub Ic and arrest toughness K sub Ia are important properties because of their value for predicting structural performance in a fracture mechanics analysis. However, the current ASTM standard procedures for measuring K sub Ic (E399) and K sub Ia (E1221) specify tests that are difficult to conduct and prone to failure for mild steels employed in nuclear reactor applications. This research focused on the development of a modified specimen and test procedure intended to improve on the current standards. The chevron-notched crack-arrest (CNCA) specimen is a hybrid design that is 25 percent smaller than the specimen prescribed in E1221. Preliminary experiments employing the CNCA specimen were performed at room temperature (23 deg C) with A533-B reactor grade steel. The success rate was 100 percent for arrest tests and 75 percent for reinitiation experiments. |
| doi_str_mv | 10.1111/j.1747-1567.1997.tb00538.x |
| format | Article |
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| language | eng |
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| source | Wiley Online Library Journals Frontfile Complete; SpringerLink Journals - AutoHoldings |
| title | MEASURING FRACTURE TOUGHNESS WITH A CHEVRON-NOTCHED CRACK-ARREST SPECIMEN |
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