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Fatigue design and testing of components

Betriebsfeste Bemessung und Versuche an Bauteilen

	Politecnico di Milano, Dipartimento di Meccanica: La fatica ad alto numero di cicli (high cycle fatigue): Problemi aperti e nuove metodologie. Atti Milano, 1998 (Dottorato di ricerca in meccanica dei materiali) pp.19-62 : Ill., Lit.
	Giornate di Studio sulla Resistenza dei Materiali <1998, Milano>

	English
	Conference Paper
	Fraunhofer LBF ()
	Aluminiumlegierung; aluminum alloy; Bauteil; Bemessung; casting alloy; constant amplitude loading; counting method; Dauerfestigkeit; design; Einstufenbeanspruchung; endurance limit; fatigue life estimation; fatigue strength; fatigue strength test; Gußlegierung; Haigh diagram; Haigh-Schaubild; Lebensdauerabschätzung; local strain; local stress; material property; material selection; mean stress; Mehrstufenbeanspruchung; metal; Metall; Mittelspannung; örtliche Dehnung; örtliche Spannung; reliability; safety; Schwingfestigkeit; Schwingfestigkeitsversuch; Sicherheit; Spannungsverteilung; Stahl; steel; stress distribution; structural component; variable amplitude loading; Werkstoffauswahl; Werkstoffeigenschaft; Woehler curve; Wöhlerlinie; Zählverfahren; Zuverlässigkeit

Abstract
Optimum dimensioning of components presupposes a knowledge of the stresses encountered under representative operating conditions and also, the strength behaviour as a result of design, material and manufacturing. In this case, the requirements concerning the fatigue life to be attained and the functionality (reliability. safety) must be taken into consideration. The parameters affecting operational strength and the methodology for optimum proofed-out dimensioning are discussed within the topics subdivisions of operational strength, statistical treatment of fatigue, parameters affecting component strength, determination and description of service load spectra and component design and testing. The topics under discussion will be restricted to the fatigue behaviour of current metallic component materials, such as forged steel, cast iron and aluminium alloys.