Fatigue. Fracture Mechanics Fatigue Testing Technique for Measuring Stable Crack Growth in Ceramics at Very High Temperatures
| Autor: | Kazutaka Torimoto, Kenji Satoh, Toshikazu Shimoyama, Makoto Kikukawa |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Cantilever
Materials science business.industry Mechanical Engineering Fracture mechanics Structural engineering Condensed Matter Physics Crack growth resistance curve Instability Crack closure Mechanics of Materials visual_art visual_art.visual_art_medium General Materials Science Ceramic business Compact tension specimen Stress concentration |
| Zdroj: | Journal of the Society of Materials Science, Japan. 46:1189-1196 |
| ISSN: | 1880-7488 0514-5163 |
| DOI: | 10.2472/jsms.46.1189 |
| Popis: | The fracture mechanics fatigue testing technique for ceramics which had been developed by the authors was examined to improve the dynamic instability caused by relaxation of crack tip stress concentration at high temperatures. Double eccentric pulsating compressive loading applied by a computer controlled fatigue testing machine was combined with negative double cantilever loading by soft springs. The testing conditions were extended to include the negative R-ratio of K-value, and the stability of crack growth was statically increased. For measuring the crack growth by the quasi-elastic compliance method and controlling the crack growth rate, an on-line computer software was newly developed, which increased the dynamic stability of testing. Consequently, the fracture mechanics fatigue testing for stable crack growth in silicon nitride became possible beyond 1300K. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|