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Short crack growth in polycrystalline materials
- 1.0352811 - ÚFM 2011 RIV NL eng J - Journal Article
Polák, Jaroslav - Kruml, Tomáš - Obrtlík, Karel - Man, Jiří - Petrenec, Martin
Short crack growth in polycrystalline materials.
Procedia Engineering. Roč. 2, č. 1 (2010), s. 883-892. E-ISSN 1877-7058.
[Fatigue 2010. Praha, 06.06.2010-11.06.2010]
R&D Projects: GA ČR GA101/07/1500
Institutional research plan: CEZ:AV0Z20410507
Keywords : fatigue damage * short crack * plastic strain
Subject RIV: JL - Materials Fatigue, Friction Mechanics
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The early stages of fatigue damage in cyclic loading in several polycrystalline materials were studied. The initiation of fatigue cracks is influenced by a number of factors like the presence of inclusions, grain size and cyclic creep strain. The growth of short cracks was measured in symmetrical loading and in cycling with positive mean stress. The kinetics of short crack growth is affected by the presence of secondary cracks and can be approximated by an exponential law. The integrated crack growth law is equivalent to Coffin-Manson law allowing the interpretation of this law in terms of short crack growth.
Permanent Link: http://hdl.handle.net/11104/0192233
Number of the records: 1