Title: Recent aspects of crack propagation analyses under variable amplitude loading conditions and prediction methods

Authors: H. Nowack, R. Marissen

Addresses: DFVLR, Institut fur Werkstoff-Forschung, D 5000 Koln 90, FRG. ' DFVLR, Institut fur Werkstoff-Forschung, D 5000 Koln 90, FRG

Abstract: The present study gives a state-of-the-art survey of the field of fatigue crack propagation. After a brief description of essential macroscopic and microscopic crack phenomena, mechanics tools for the representation of crack data are outlined. A survey of crack propagation prediction methods for variable amplitude loading is given, and it is shown how far they explicitly account for the non-linearity in the damage accumulation due to load history-dependent sequence effects. The viewpoint of the practical application of the crack propagation prediction methods in engineering design is specially considered. In the last part of the study some aspects regarding the further development of crack propagation analyses (consideration of compression loads, dK/da, short cracks and microstructural processes) are given.

Keywords: constant amplitude loading; crack propagation prediction; fatigue; variable amplitude loading; fatigue cracks; engineering design; compression loads; microstructure.

DOI: 10.1504/IJMPT.1988.036696

International Journal of Materials and Product Technology, 1988 Vol.3 No.1, pp.104 - 119

Published online: 06 Nov 2010 *

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