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Preloading Technique in Dynamic Fatigue Testing of Glass and Ceramics with an Indentation Flaw System
Author(s) -
Choi Sung R.,
Salem Jonathan A.
Publication year - 1996
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1996.tb08577.x
Subject(s) - materials science , composite material , indentation , fatigue limit , ceramic , distilled water , cyclic stress , chromatography , chemistry
The solution of fatigue strength as a function of preloading in dynamic fatigue testing was obtained numerically for an indentation flaw system. The dynamic fatigue strength is dependent on preloading and fatigue parameter (K). The effect of preloading on dynamic fatigue strength decreases with increasing fatigue parameter: for n 20 the effect is negligible up to a preloading of 90%. The solution was verified by dynamic fatigue experiments conducted with soda‐lime glass and alumina specimens with as‐indented flaws in room‐temperature distilled water. The result indicates that one can apply a preloading corresponding up to 90% of fatigue strength for most glass and ceramic materials with no change in fatigue strength, resulting in a dramatic saving of testing time.