Uniaxial and biaxial fracture behaviour of refractory materials

Mechanical fracture properties of specimens taken from refractory materials of different brittleness are described using the wedge splitting method according to Tschegg in uniaxial and biaxial load cases. Notch-tensile strength, fracture energy and the characteristic length were determined. Fracture...

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Bibliographic Details
Published in:Engineering fracture mechanics 2009-09, Vol.76 (14), p.2249-2259
Main Authors: Tschegg, E.K., Fendt, K.T., Manhart, Ch, Harmuth, H.
Format: Article
Language:English
Subjects:
Acoustic emission
Biaxial fracture properties
Cross-disciplinary physics: materials science
rheology
Damage
Exact sciences and technology
Fracture mechanics (crack, fatigue, damage...)
Fundamental areas of phenomenology (including applications)
Materials science
Materials testing
Physics
Refractory materials
Solid mechanics
Structural and continuum mechanics
Wedge splitting test
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Summary:Mechanical fracture properties of specimens taken from refractory materials of different brittleness are described using the wedge splitting method according to Tschegg in uniaxial and biaxial load cases. Notch-tensile strength, fracture energy and the characteristic length were determined. Fracture energy under a uniaxial load is more or less the same for all materials; if a load becomes biaxial, values fall to approx. 70% in materials with reduced brittleness and to 40% in brittle materials, compared to uniaxial values. The sensitivity against crack propagation ( l ch) changes insignificantly under both uniaxial and biaxial loading of brittle and brittleness-reduced materials.
ISSN:0013-7944
1873-7315
DOI:10.1016/j.engfracmech.2009.07.011