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Numerical investigations of corner singularities in cracked bodies
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SYSNO ASEP 0092920 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Numerical investigations of corner singularities in cracked bodies Title Numerické stanovení rohové singularity v tělese s trhlinou Author(s) Hutař, Pavel (UFM-A) RID, ORCID
Náhlík, Luboš (UFM-A) RID, ORCID
Knésl, Zdeněk (UFM-A)Source Title Key Engineering Materials - ISSN 1013-9826
Roč. 348-349, - (2007), s. 377-380Number of pages 4 s. Publication form CD - CD Action International Conference on Fracture and Damage Mechanics /6./ Event date 17.07.2007-19.07.2007 VEvent location Funchal, Madeira Country PT - Portugal Event type WRD Language eng - English Country CH - Switzerland Keywords corner singularity ; free surface ; general singular stress concentrator ; fatigue crack Subject RIV JL - Materials Fatigue, Friction Mechanics R&D Projects GP106/06/P239 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20410507 - UFM-A (2005-2011) Annotation The influence of corner singularity on the distribution of the stresses around the crack front for a three-dimensional structure is described in this paper. The distribution of stress singularity through the thickness of the middle tension specimen provides us an indication of crack behaviour close to a free surface. An estimation of the region where the change of singularity exponent plays an important role in fatigue crack propagation rate was carried out. A decrease in fatigue crack propagation rate close to the free surface was found. The lower fatigue crack propagation rate in the boundary layer in comparison with the interior of the specimen leads to a change of intersecting angle between crack and free surface and depends on Poisson’s ratio. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2008
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