Details
| Original language | English |
|---|---|
| Pages (from-to) | 173-188 |
| Number of pages | 16 |
| Journal | Computational mechanics |
| Volume | 53 |
| Issue number | 1 |
| Publication status | Published - 18 Jul 2013 |
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
ASJC Scopus subject areas
- Engineering(all)
- Ocean Engineering
- Engineering(all)
- Mechanical Engineering
- Computer Science(all)
- Computational Theory and Mathematics
- Mathematics(all)
- Computational Mathematics
- Mathematics(all)
- Applied Mathematics
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In: Computational mechanics, Vol. 53, No. 1, 18.07.2013, p. 173-188.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - 3D multiscale crack propagation using the XFEM applied to a gas turbine blade
AU - Holl, Matthias
AU - Rogge, Timo
AU - Loehnert, Stefan
AU - Wriggers, Peter
AU - Rolfes, Raimund
N1 - 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.
PY - 2013/7/18
Y1 - 2013/7/18
N2 - 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.
AB - 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.
KW - 3D
KW - Crack propagation
KW - Fatigue strength
KW - Gas turbine blade
KW - Linear damage accumulation
KW - Multiscale
KW - XFEM
UR - http://www.scopus.com/inward/record.url?scp=84892785173&partnerID=8YFLogxK
U2 - 10.1007/s00466-013-0900-5
DO - 10.1007/s00466-013-0900-5
M3 - Article
AN - SCOPUS:84892785173
VL - 53
SP - 173
EP - 188
JO - Computational mechanics
JF - Computational mechanics
SN - 0178-7675
IS - 1
ER -