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Heart-shaped crack-tip zones - Effect of the zone length

Schell, K. G. ORCID iD icon; Bucharsky, C.; Rizzi, G.; Fett, T.

Abstract:

In this report the general influence of different elastic modules ahead of a crack tip and in the bulk on the stress intensity factors will be discussed again. From the FE results obtained in Report [1], and the theoretical solution by Merkle [3] K = KapplEE0 it becomes clear that the FE-results for relative zone sizes ω/a >0 must deviate from the exact solution but are also in rather good agreement with the theoretic results for finite ω/a. In this report also results are compiled for cracks fully embedded in zones with reduced module. Such cracks show stress intensity factors completely different from a E/E0 -dependency. Nevertheless, it can be concluded that the stress intensity factors on the basis of the J-integral agree with those obtained by COD evaluation. As an approximate description of the observed E/E0-dependency we suggest KKappl 2EE+E0

Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Werkstoff- und Biomechanik (IAM-WBM)
Institut für Angewandte Materialien – Keramische Werkstoffe und Technologien (IAM-KWT1)
Publikationstyp Forschungsbericht/Preprint
Publikationsjahr 2020
Sprache Deutsch
Identifikator ISSN: 2194-1629
KITopen-ID: 1000122362
Verlag Karlsruher Institut für Technologie (KIT)
Umfang VI, 9 S.
Serie KIT Scientific Working Papers ; 148

Volltext §
DOI: 10.5445/IR/1000122362
Veröffentlicht am 04.08.2020
Seitenaufrufe: 168
seit 04.08.2020
Downloads: 86
seit 05.08.2020
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