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Combining H-adaptivity with the element splitting method for crack simulation in large structures
Citation Link: https://doi.org/10.15480/882.4084
Publikationstyp
Journal Article
Date Issued
2022-01-01
Sprache
English
Author(s)
TORE-DOI
Journal
Volume
15
Issue
1
Article Number
240
Citation
Materials 15 (1): 240 (2022-01-01)
Publisher DOI
Scopus ID
Publisher
Multidisciplinary Digital Publishing Institute
H-adaptivity is an effective tool to introduce local mesh refinement in the FEM-based numerical simulation of crack propagation. The implementation of h-adaptivity could benefit the numerical simulation of fatigue or accidental load scenarios involving large structures, such as ship hulls. Meanwhile, in engineering applications, the element deletion method is frequently used to represent cracks. However, the element deletion method has some drawbacks, such as strong mesh dependency and loss of mass or energy. In order to mitigate this problem, the element splitting method could be applied. In this study, a numerical method called ‘h-adaptive element splitting’ (h-AES) is introduced. The h-AES method is applied in FEM programs by combining h-adaptivity with the element splitting method. Two examples using the h-AES method to simulate cracks in large structures under linear-elastic fracture mechanics scenario are presented. The numerical results are verified against analytical solutions. Based on the examples, the h-AES method is proven to be able to introduce mesh refinement in large-scale numerical models that mostly consist of structured coarse meshes, which is also beneficial to the reduction of computational resources. By employing the h-AES method, very small cracks are well represented in large structures without any deletions of elements.
Subjects
finite element method
mesh strategy
linear elastic fracture mechanics
mesh refinement
fracture mechanics
numerical crack
h-AES method
interelement method
edge separation
crack propagation
DDC Class
600: Technik
Funding Organisations
More Funding Information
We acknowledge support for the Open Access fees by Hamburg University of Technology (TUHH) in the funding programme Open Access Publishing.
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