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An investigation into the methods for modelling pre-existing cracks in phase field problems

Sims, B.; Bird, R.E.; Giani, S.; Coombs, W.M.

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Authors

Profile image of Bradley Sims

Bradley Sims bradley.sims@durham.ac.uk
PGR Student Doctor of Philosophy

Dr Robert Bird robert.e.bird@durham.ac.uk
PDRA in Computational Solid Mechanics



Abstract

Phase field (PF) models are an increasingly popular method of numerically modelling fracture problems. While research has focused on the practical applications and computational efficiency of PF methods, little discussion exists around the merits of different methods of prescribing initial cracks in PF fracture problems. This paper presents a comparison of three methods for modelling pre-existing cracks, through Dirichlet-type PF boundary conditions, an initial strain history term, and through physical discontinuities in the mesh. The comparison is made using the load-displacement responses for a common tensile benchmark fracture problem.

Citation

Sims, B., Bird, R., Giani, S., & Coombs, W. (2023). An investigation into the methods for modelling pre-existing cracks in phase field problems.

Presentation Conference Type Conference Paper (Published)
Conference Name UKACM 2023
Start Date Apr 19, 2023
End Date Apr 21, 2023
Acceptance Date Feb 28, 2023
Publication Date 2023
Deposit Date Jul 12, 2023
Publicly Available Date Jul 12, 2023
Public URL https://durham-repository.worktribe.com/output/1133575
Publisher URL https://sites.google.com/view/ukacm2023conference

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