Microstructure-sensitive finite-element analysis of crack-tip opening displacement and crack closure for microstructural short fatigue cracks
- In this paper, the effect of the polycrystalline microstructure on crack-tip opening displacement and crack closure is investigated for microstructural short plane strain fatigue cracks using the finite-element method. To this end, cracks are introduced in synthetically generated microstructures and the grain properties are described using a single crystal plasticity model with kinematicIn this paper, the effect of the polycrystalline microstructure on crack-tip opening displacement and crack closure is investigated for microstructural short plane strain fatigue cracks using the finite-element method. To this end, cracks are introduced in synthetically generated microstructures and the grain properties are described using a single crystal plasticity model with kinematic hardening. Additionally, finite-element calculations without resolved microstructure and von Mises plasticity with kinematic hardening are performed. Fully-reversed strain-controlled cyclic loadings are considered under large-scale yielding conditions as typical for low-cycle fatigue problems. The crack opening stress and the cyclic crack-tip opening displacement are significantly influenced by the local grain structure. While the stabilized crack opening stresses obtained with the microstructure-based finite-element model are in good accordance with the von Mises plasticity results, the differences in the cyclic crack opening displacement are addressed to the asymmetric plastic strain fields in the plastic wake behind the crack-tip of the microstructure-based model. The asymmetric plastic strain fields result in discontinuous and premature contact of the crack flanks.…
Document Type: | Article (reviewed) |
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Zitierlink: | https://opus.hs-offenburg.de/6279 | Bibliografische Angaben |
Title (English): | Microstructure-sensitive finite-element analysis of crack-tip opening displacement and crack closure for microstructural short fatigue cracks |
Author: | Simon Lubich, Carl FischerORCiDGND, Simon SchilliStaff MemberGND, Thomas SeifertStaff MemberORCiDGND |
Year of Publication: | 2022 |
Publisher: | Elsevier |
Article Number: | 106911 |
Parent Title (English): | International Journal of Fatigue |
Volume: | 162 |
ISSN: | 0142-1123 |
DOI: | https://doi.org/10.1016/j.ijfatigue.2022.106911 |
Language: | English | Inhaltliche Informationen |
Institutes: | Forschung / CRT - Campus Research & Transfer |
Fakultät Maschinenbau und Verfahrenstechnik (M+V) | |
DDC classes: | 600 Technik, Medizin, angewandte Wissenschaften |
Tag: | Crack opening stress; Crystal plasticity finite-element simulation; Cyclic crack-tip opening displacement; Microstructure; Plasticity-induced crack closure |
Funded by (selection): | Deutsche Forschungsgemeinschaft | Formale Angaben |
Relevance: | Wiss. Zeitschriftenartikel reviewed: Listung in Master Journal List |
Open Access: | Closed |
Licence (German): | Urheberrechtlich geschützt |