| Autor: |
Masayuki Tsukada, Eiichi Sato, Kazuhiko Kuribayashi |
| Rok vydání: |
2005 |
| Předmět: |
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| Zdroj: |
Materials Science Forum. :1329-1332 |
| ISSN: |
1662-9752 |
| DOI: |
10.4028/www.scientific.net/msf.475-479.1329 |
| Popis: |
Fracture behavior under multiaxial stress state of polycrystalline alumina was studied from the view point of an artificial crack propagation and fracture from a natural flaw. The former was studied by mixed-mode fracture toughness tests; asymmetric four-point bending and diametral compression techniques were carried out using precracked and notched specimens. The latter was studied by biaxial fracture tests in compression and torsion loading; multiaxial fracture statistics was applied to the measured fracture envelope. The ratio KIIC/KIC obtained from the biaxial tests was higher than that obtained by the mixed-mode fracture toughness tests. It revealed that the fracture from an artificial flaw does not simulate the fracture from a naturall flaw in polycrystalline ceramics. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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