Details
| Original language | English |
|---|---|
| Article number | 117432 |
| Journal | Composite structures |
| Volume | 323 |
| Early online date | 9 Aug 2023 |
| Publication status | Published - 1 Nov 2023 |
Abstract
In the present work, a phase-field lattice model (PFLM) is proposed to model fracture problems. The element deletion process and oversimplified failure criterion of the classical lattice model not only lead to a strong mesh sensitivity but also limit the method's application to various materials and fracture modes. Hence, a smeared form of crack is introduced into the lattice model to deal with these problems. The model exploits discontinuous discrete methods to model the propagation of three-dimensional cracks by characterizing the crack with a phase-field variable. Moreover, by regarding the crack propagation process as a multi-field problem composed of a displacement field and a phase-field, a flexible and robust algorithm is established, in which the crack path can be obtained directly by resolving the governing equations. Numerical simulations were performed and compared with the experimental results and other numerical models. It is shown that the PFLM can capture the main features of the fracture for both brittle and quasi-brittle materials. To further demonstrate the performance of the model, a mesoscale system of cement composite generated by computed tomography scanning technology was examined. The result demonstrates that the fracture of composite materials can also be well predicted.
Keywords
- Brittle and quasi-brittle fracture, Composite materials, Lattice model, Phase-field model, Three-dimensional modelling
ASJC Scopus subject areas
- Materials Science(all)
- Ceramics and Composites
- Engineering(all)
- Civil and Structural Engineering
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In: Composite structures, Vol. 323, 117432, 01.11.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - A phase-field lattice model (PFLM) for fracture problem
T2 - Theory and application in composite materials
AU - Yue, Qiang
AU - Wang, Qiao
AU - Tian, Wenxiang
AU - Rabczuk, Timon
AU - Zhou, Wei
AU - Ma, Gang
AU - Zhuang, Xiaoying
AU - Chang, Xiaolin
N1 - Funding Information: Financial support for the project from the National Key R&D Program of China (No. 2022YFC3005505), National Natural Science Foundation of China (No. 51979207, No. U2040223) is acknowledged.
PY - 2023/11/1
Y1 - 2023/11/1
N2 - In the present work, a phase-field lattice model (PFLM) is proposed to model fracture problems. The element deletion process and oversimplified failure criterion of the classical lattice model not only lead to a strong mesh sensitivity but also limit the method's application to various materials and fracture modes. Hence, a smeared form of crack is introduced into the lattice model to deal with these problems. The model exploits discontinuous discrete methods to model the propagation of three-dimensional cracks by characterizing the crack with a phase-field variable. Moreover, by regarding the crack propagation process as a multi-field problem composed of a displacement field and a phase-field, a flexible and robust algorithm is established, in which the crack path can be obtained directly by resolving the governing equations. Numerical simulations were performed and compared with the experimental results and other numerical models. It is shown that the PFLM can capture the main features of the fracture for both brittle and quasi-brittle materials. To further demonstrate the performance of the model, a mesoscale system of cement composite generated by computed tomography scanning technology was examined. The result demonstrates that the fracture of composite materials can also be well predicted.
AB - In the present work, a phase-field lattice model (PFLM) is proposed to model fracture problems. The element deletion process and oversimplified failure criterion of the classical lattice model not only lead to a strong mesh sensitivity but also limit the method's application to various materials and fracture modes. Hence, a smeared form of crack is introduced into the lattice model to deal with these problems. The model exploits discontinuous discrete methods to model the propagation of three-dimensional cracks by characterizing the crack with a phase-field variable. Moreover, by regarding the crack propagation process as a multi-field problem composed of a displacement field and a phase-field, a flexible and robust algorithm is established, in which the crack path can be obtained directly by resolving the governing equations. Numerical simulations were performed and compared with the experimental results and other numerical models. It is shown that the PFLM can capture the main features of the fracture for both brittle and quasi-brittle materials. To further demonstrate the performance of the model, a mesoscale system of cement composite generated by computed tomography scanning technology was examined. The result demonstrates that the fracture of composite materials can also be well predicted.
KW - Brittle and quasi-brittle fracture
KW - Composite materials
KW - Lattice model
KW - Phase-field model
KW - Three-dimensional modelling
UR - http://www.scopus.com/inward/record.url?scp=85167979134&partnerID=8YFLogxK
U2 - 10.1016/j.compstruct.2023.117432
DO - 10.1016/j.compstruct.2023.117432
M3 - Article
AN - SCOPUS:85167979134
VL - 323
JO - Composite structures
JF - Composite structures
SN - 0263-8223
M1 - 117432
ER -