3D multiscale crack propagation using the XFEM applied to a gas turbine blade

authored by: Matthias Holl, Timo Rogge, Stefan Loehnert, Peter Wriggers, Raimund Rolfes
Abstract: This work presents a new multiscale technique to investigate advancing cracks in three dimensional space. This fully adaptive multiscale technique is designed to take into account cracks of different length scales efficiently, by enabling fine scale domains locally in regions of interest, i.e. where stress concentrations and high stress gradients occur. Due to crack propagation, these regions change during the simulation process. Cracks are modeled using the extended finite element method, such that an accurate and powerful numerical tool is achieved. Restricting ourselves to linear elastic fracture mechanics, the J -integral yields an accurate solution of the stress intensity factors, and with the criterion of maximum hoop stress, a precise direction of growth. If necessary, the on the finest scale computed crack surface is finally transferred to the corresponding scale. In a final step, the model is applied to a quadrature point of a gas turbine blade, to compute crack growth on the microscale of a real structure.
Organisation(s): Institute of Continuum Mechanics
Institute of Structural Analysis
Type: Article
Journal: Computational mechanics
Volume: 53
Pages: 173-188
No. of pages: 16
ISSN: 0178-7675
Publication date: 18.07.2013
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Ocean Engineering, Mechanical Engineering, Computational Theory and Mathematics, Computational Mathematics, Applied Mathematics
Electronic version(s): https://doi.org/10.1007/s00466-013-0900-5 (Access: Unknown)
: Details in the research portal "Research@Leibniz University"

BibTeX

@article{a87c72fca5ae467d98719fae857e2767,
title = "3D multiscale crack propagation using the XFEM applied to a gas turbine blade",
abstract = "This work presents a new multiscale technique to investigate advancing cracks in three dimensional space. This fully adaptive multiscale technique is designed to take into account cracks of different length scales efficiently, by enabling fine scale domains locally in regions of interest, i.e. where stress concentrations and high stress gradients occur. Due to crack propagation, these regions change during the simulation process. Cracks are modeled using the extended finite element method, such that an accurate and powerful numerical tool is achieved. Restricting ourselves to linear elastic fracture mechanics, the J -integral yields an accurate solution of the stress intensity factors, and with the criterion of maximum hoop stress, a precise direction of growth. If necessary, the on the finest scale computed crack surface is finally transferred to the corresponding scale. In a final step, the model is applied to a quadrature point of a gas turbine blade, to compute crack growth on the microscale of a real structure.",
keywords = "3D, Crack propagation, Fatigue strength, Gas turbine blade, Linear damage accumulation, Multiscale, XFEM",
author = "Matthias Holl and Timo Rogge and Stefan Loehnert and Peter Wriggers and Raimund Rolfes",
note = "Funding information: The German Research Association is gratefully acknowledged for the support of the Collaborative Research Center (SFB) 871. Furthermore, the first author would like to thank Dr. Tymofiy Gerasimov for splendid discussions about the XFEM.",
year = "2013",
month = jul,
day = "18",
doi = "10.1007/s00466-013-0900-5",
language = "English",
volume = "53",
pages = "173--188",
journal = "Computational mechanics",
issn = "0178-7675",
publisher = "Springer Verlag",
number = "1",
}