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Study on the cohesive edge crack in a square plate with the cohesive element method
Citation Link: https://doi.org/10.15480/882.3827
Publikationstyp
Journal Article
Date Issued
2021-07-01
Sprache
English
Author(s)
TORE-DOI
Volume
231
Issue
1
Start Page
21
End Page
41
Citation
International Journal of Fracture 231 (1): 21-41 (2021-09)
Publisher DOI
Scopus ID
Publisher
Springer Science + Business Media B.V
The size of the fully developed process zone (FDPZ) is needed for the arrangement of displacement sensors in fracture experiments and choosing element size in numerical models using the cohesive element method (CEM). However, the FDPZ size is generally not known beforehand. Analytical solutions for the exact FDPZ size only exist for highly idealised bodies, e.g. semi-infinite plates. With respect to fracture testing, the CEM is also a potential tool to extrapolate laboratory test results to full-scale while considering the size effect. A numerical CEM-based model is built to compute the FDPZ size for an edge crack in a finite square plate of different lengths spanning several magnitudes. It is validated against existing analytical solutions. After successful validation, the FDPZ size of finite plates is calculated with the same numerical scheme. The (FDPZ) size for finite plates is influenced by the cracked plate size and physical crack length. Maximum cohesive zone sizes are given for rectangular and linear softening. Further, for this setup, the CEM-based numerical model captures the size effect and can be used to extrapolate small-scale test results to full-scale.
Subjects
Cohesive element method
Cohesive zone
Edge crack
Linear softening
Rectangular softening
Size effect
DDC Class
600: Technik
Funding Organisations
More Funding Information
Wenjun Lu was funded by VISTA- a basic research programme in collaboration between The Norwegian Academy of Science and Letters, and Equinor.
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