ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 7

The Application of the Single-Edge Notched Beam to Fracture Toughness Testing of Ceramics

Simpson, LA
Research officer, Materials Science Branch, Atomic Energy of Canada Ltd, Whiteshell Nuclear Research Establishment, Pinawa, Manitoba

Hsu, TR
Associate professor, University of Manitoba, Winnipeg, Manitoba

Merrett, G
Bristol Aerospace Ltd, Winnipeg, Manitoba

Abstract

There is a need for easy-to-fabricate fracture toughness specimens for ceramics. The single-edge notched beam satisfies this need, except that the American Society for Testing and Materials (ASTM) specification for notch root crack depth is difficult to achieve in ceramics using standard metallurgical methods. Finite element techniques are used to demonstrate that a minimum ratio of crack depth to notch root radius of 0.5 is sufficient for a valid test in a ceramic. These calculations are confirmed by experiments on soda-lime glass specimens.

Keywords:
tests, ceramics, fracture strength, notches, cracks, glass, finite element, stress concentration, stress intensity factors, fractures (materials)

Paper ID: JTE11683J
DOI: 10.1520/JTE11683J
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