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Crostack, H.A.; Bach, F.W.
Mechanism-orientated life prediction for metal components under cyclic stress. DFG interim colloquium2000
Mechanism-orientated life prediction for metal components under cyclic stress. DFG interim colloquium2000
AbstractAbstract
[en] Aiming to develop a model describing the propagation of short fatigue cracks in an Al alloy the strain and other deformation quantities were measured ahead the crack tip at different stages of fatigue. The method used includes cyclic loading of tensile specimens within a SEM, taking digital images and image processing. The results reveal an important effect of microstructure on the distribution of strain at the crack tip. Rate and direction of crack propagation are related to this strain distribution. A power law was found between crack propagation rate da/dN and the product of accumulated equivalent strain and strain increment. (orig.)
Original Title
Einfluss der lokalen Verformung auf die Ausbreitung kurzer Ermuedungsrisse in einer Al-Legierung
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Deutscher Verband fuer Materialforschung und -pruefung e.V., Berlin (Germany); 186 p; 2000; p. 107-114; DFG interim colloquium: Mechanism-orientated life prediction for metal components under cyclic stress; DFG-Zwischenkolloquium: Mechanismenorientierte Lebensdauervorhersage fuer zyklisch beanspruchte metallische Bauteile; Bremen (Germany); 24-25 Feb 2000; Available from TIB Hannover
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