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  5. A general framework for decomposing the phase field fracture driving force, particularised to a Drucker–Prager failure surface
 
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A general framework for decomposing the phase field fracture driving force, particularised to a Drucker–Prager failure surface
File(s)
1-s2.0-S0167844222002981-main.pdf (2.25 MB)
Published version
Author(s)
Navidtehrani, Yousef
Betegón, Covadonga
Martínez-Pañeda, Emilio
Type
Journal Article
Abstract
Due to its computational robustness and versatility, the phase field fracture model has become the preferred tool for predicting a wide range of cracking phenomena. However, in its conventional form, its intrinsic tension–compression symmetry in damage evolution prevents its application to the modelling of compressive failures in brittle and quasi-brittle solids, such as concrete or rock materials. In this work, we present a general methodology for decomposing the phase field fracture driving force, the strain energy density, so as to reproduce asymmetrical tension–compression fracture behaviour. The generalised approach presented is particularised to the case of linear elastic solids and the Drucker–Prager failure criterion. The ability of the presented model to capture the compressive failure of brittle materials is showcased by numerically implementing the resulting strain energy split formulation and addressing four case studies of particular interest. Firstly, insight is gained into the capabilities of the model in predicting friction and dilatancy effects under shear loading. Secondly, virtual direct shear tests are conducted to assess fracture predictions under different pressure levels. Thirdly, a concrete cylinder is subjected to uniaxial and triaxial compression to investigate the influence of confinement. Finally, the localised failure of a soil slope is predicted and the results are compared with other formulations for the strain energy decomposition proposed in the literature. The results provide a good qualitative agreement with experimental observations and demonstrate the capabilities of phase field fracture methods to predict crack nucleation and growth under multi-axial loading in materials exhibiting asymmetric tension–compression fracture behaviour.
Date Issued
2022-10-01
Date Acceptance
2022-08-22
Citation
Theoretical and Applied Fracture Mechanics, 2022, 121, pp.103555-103555
URI
http://hdl.handle.net/10044/1/99608
URL
https://www.sciencedirect.com/science/article/pii/S0167844222002981
DOI
https://www.dx.doi.org/10.1016/j.tafmec.2022.103555
ISSN
0167-8442
Publisher
Elsevier BV
Start Page
103555
End Page
103555
Journal / Book Title
Theoretical and Applied Fracture Mechanics
Volume
121
Copyright Statement
© 2022 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
License URL
http://creativecommons.org/licenses/by/4.0/
Sponsor
Medical Research Council (MRC)
Identifier
https://www.sciencedirect.com/science/article/pii/S0167844222002981
Grant Number
MR/V024124/1
Subjects
cond-mat.mtrl-sci
cond-mat.mtrl-sci
cs.CE
physics.app-ph
Mechanical Engineering & Transports
0102 Applied Mathematics
0905 Civil Engineering
0913 Mechanical Engineering
Publication Status
Published
Article Number
103555
Date Publish Online
2022-08-28
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