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Fatigue design criteria for ceramic components under cyclic loading

Bemessungskriterien für schwingbeanspruchte keramische Bauteile
: Buxbaum, O.; Sonsino, C.M.

Deutsche Gesellschaft für Materialkunde e.V. -DGM-, Oberursel:
PTM '93. Materials by Powder Technology. Proceedings
Oberursel: DGM-Informationsgesellschaft, 1993
ISBN: 3-88355-191-0
pp.551-556 : Abb.,Tab.,Lit.
International Conference on Materials by Powder Technology <1993, Dresden>
Conference Paper
Fraunhofer LBF ()
Bauteil; Bemessung; ceramic; design; fatigue behaviour; fatigue loading; keramischer Werkstoff; Schwingbeanspruchung; Schwingfestigkeitsverhalten; structural component

The investigations carried out and the results presented show clearly that for a fatigue design against cyclic loading the knowledge of conventional properties like tensile or compressive static stresses are not sufficient; they do not contain the information about endurable stresses, the effects of mean-stress and notch sensitivity as well as the size effect obviously reduced under cyclic loading. However, if cyclic fatigue properties are not available in dependency of stress-concentration, mean-stresses, and loading mode, a preliminary fatigue design can be carried out by applying the proposed uniform S-N curve, Fig. 7. The starting point is then the monotonic bending strength of the candidate ceramic material (Psubs is equal to 50 %) obtained from specimens having similar dimensions as the component to be designed. But this procedure requires subsequent verification tests with real components.