Mixed‐Mode Fracture from Controlled Surface Flaws in Hot‐Pressed Si 3 N 4
Authors:
- 1 March 1976
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 59 (3-4) , 163-167
Abstract
The room‐temperature mixed‐mode fracture of commercial hot‐pressed Si 3 N 4 was examined using controlled surface flaws in 4‐point bending, oriented at various angles 6 with respect to the outer fiber tensile stress direction. Catastrophic fracture paths were non‐coplanar with the initial flaw plane, and the stress intensity factor ratio K I /K IC was < 1 for fracture in modes II and III. A non‐coplanar maximum strain‐energy release rate fracture criterion best described mixed‐mode fracture.Keywords
This publication has 5 references indexed in Scilit:
- Controlled Surface Flaws in Hot‐Pressed Si 3 N 4Journal of the American Ceramic Society, 1975
- Brittle Materials Design, High Temperature Gas Turbine1973
- Stress Intensity Factors for Semicircular Cracks: Part 2—Semi-Infinite SolidJournal of Applied Mechanics, 1967
- Three-Dimensional Stress Distribution Around an Elliptical Crack Under Arbitrary LoadingsJournal of Applied Mechanics, 1966
- On the Crack Extension in Plates Under Plane Loading and Transverse ShearJournal of Basic Engineering, 1963