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Viscoelastic phase-field fracture using the framework of representative crack elements.
- Source :
- International Journal of Fracture; Sep2022, Vol. 237 Issue 1/2, p139-163, 25p
- Publication Year :
- 2022
-
Abstract
- The promising phase-field method has been intensively studied for crack approximation in brittle materials. The realistic representation of material degradation at a fully evolved crack is still one of the main challenges. Several energy split formulations have been postulated to describe the crack evolution physically. A recent approach based on the concept of representative crack elements (RCE) in Storm et al. (The concept of representative crack elements (RCE) for phase-field fracture: anisotropic elasticity and thermo-elasticity. Int J Numer Methods Eng 121:779–805, 2020) introduces a variational framework to derive the kinematically consistent material degradation. The realistic material degradation is further tested using the self-consistency condition, which is particularly compared to a discrete crack model. This work extends the brittle RCE phase-field modeling towards rate-dependent fracture evolution in a viscoelastic continuum. The novelty of this paper is taking internal variables due to viscoelasticity into account to determine the crack deformation state. Meanwhile, a transient extension from Storm et al. (The concept of representative crack elements (RCE) for phase-field fracture: anisotropic elasticity and thermo-elasticity. Int J Numer Methods Eng 121:779–805, 2020) is also considered. The model is derived thermodynamic-consistently and implemented into the FE framework. Several representative numerical examples are investigated, and consequently, the according findings and potential perspectives are discussed to close this paper. [ABSTRACT FROM AUTHOR]
- Subjects :
- ELASTICITY
STORMS
VISCOELASTICITY
BRITTLE materials
Subjects
Details
- Language :
- English
- ISSN :
- 03769429
- Volume :
- 237
- Issue :
- 1/2
- Database :
- Complementary Index
- Journal :
- International Journal of Fracture
- Publication Type :
- Academic Journal
- Accession number :
- 160077040
- Full Text :
- https://doi.org/10.1007/s10704-021-00522-1