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Exponential slow crack growth of glass and advanced ceramics—dynamic fatigue
Author(s) -
CHOI S. R.,
NEMETH N. N.,
GYEKENYESI J. P.
Publication year - 2005
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/j.1460-2695.2005.00890.x
Subject(s) - exponential function , materials science , power law , composite material , ceramic , paris' law , fracture mechanics , constant (computer programming) , stress (linguistics) , structural engineering , mechanics , crack closure , mathematics , mathematical analysis , engineering , statistics , computer science , physics , linguistics , philosophy , programming language
The life prediction analysis based on an exponential crack‐velocity formulation was made and examined using a variety of experimental data on glass and advanced structural ceramics in constant stress‐rate (‘dynamic fatigue’) loading at ambient and elevated temperatures. The data fit to the relation of strength versus ln ( stress rate ) was very reasonable for most of the materials. The major limitation in the exponential crack‐velocity formulation, however, was that the inert strength of a material must be known a priori to evaluate the important SCG parameter, n , a significant drawback as compared with the conventional power‐law crack‐velocity formulation.