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Fatigue behaviour of sintered materials and components under operational service

: Sonsino, C.M.

Torralba, J.M.; Velasco, F. ; European Powder Metallurgy Association -EPMA-:
Powder Metallurgy World Congress & Exhibition 1998. Education Programme
Shrewsbury: EPMA, 1998
S.185-216 : Ill., Lit.
Powder Metallurgy World Congress & Exhibition (PM) <1998, Granada>
Fraunhofer LBF ()
Bauteil; Betriebsbeanspruchung; connecting rod; Dauerfestigkeit; density; Dichte; endurance limit; Fahrzeugbau; failure criterion; fatigue behaviour; fatigue strength; Fertigung; Festigkeitsbeurteilung; Hertzian contact; Hertz'sche Pressung; local stress; manufacturing process; operational loading; örtliche Spannung; Pleuelstange; powder metallurgy; Probestab; Pulvermetallurgie; Schwingfestigkeit; sintered material; sintering; Sintern; Sinterwerkstoff; Spannungsverteilung; specimen; strength evaluation; stress distribution; structural component; vehicle construction; Versagenskriterium; Versagensverhalten; Woehler curve; Wöhlerlinie

The development of fatigue loaded PM parts requires knowledge of material related design data such as S-N curves, influence of loading mode, notches, and mean stress sensitivity on one hand, and on the other hand knowledge of the service loading and the local stresses resulting in the most critical areas of the part. Comparison between the local and the allowable stresses shows whether the design can be implemented or further optimisation is necessary. The fatigue design procedure and its experimental verification is demonstrated by two case studies.