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1989
Report
Title
Zum Einfluà der Belastungsreihenfolge auf die Lebensdauer von Kerbstäben aus Stahl und Aluminium
Title Supplement
Prof. Svenson zum 80. Geburtstag gewidmet
Other Title
About the effect of loading sequence on the fatigue life of notched specimens made from steel and aluminium alloys
Abstract
A statistical parameter which can be derived from the Markov matrix has been defined in order to characterize the intermixture of random loading fluctuations. By means of this intermixture parameter load sequences for fatigue tests can be generated closer to reality and thus more reliable as well as effects resulting from loading sequences can be taken into account quantitatively in life calculations. The intermixture parameter has been calculated for 17 test laod sequences. The corresponding fatigue test results obtained for notched specimens (K sub t 1.4 up to 3.6) made from steels or aluminium alloys either under bending or axial loading, led to a general relation between intermixture and fatigue life being primarily influenced by the stress ratio.
Corporate Author
Fraunhofer-Institut fĂźr Betriebsfestigkeit -LBF-, Darmstadt
Publisher
Fraunhofer LBF
Publishing Place
Darmstadt
Language
German
Keyword(s)
aluminium
Belastungsreihenfolge
counting method
Durchmischung
estimation
fatigue life
gekerbte Probe
intermixture
Lebensdauerabschätzung
local stress strain approach
Nennspannungskonzept
nominal stress approach
notched specimen
Ăśrtliches Spannungsdehnungskonzept
sequence of loading
simulation
Stahl
steel
Zählverfahren
Reihenfolge
Markov Prozess
Werkstoffeigenschaft