Details
| Original language | English |
|---|---|
| Article number | 04022114 |
| Journal | Journal of engineering mechanics |
| Volume | 149 |
| Issue number | 2 |
| Early online date | 14 Dec 2022 |
| Publication status | Published - Feb 2023 |
| Externally published | Yes |
Abstract
The mesoscale structure generated in concrete plays a significant role in the mechanical properties and local failure behavior of mesoscale concrete. This work proposes a novel rigid-block discrete-element method (RB-DEM) for concrete modeling with random mesoscale structure. The results of the uniaxial compression using the RB-DEM demonstrated satisfactory agreement with experimental data. The RB-DEM does not only show satisfactory performance in simulation but also it is simple to use. The RB-DEM model can be built from any finite-element mesh generator, either open source codes or commercial software, which are readily available. The interfacial transition zone (ITZ) is modeled directly by assigning the weakened contact model or parameter at the interface between aggregate and mortar. The effects of ITZ parameters, aggregate volume fraction, and geometric shape on the stress-strain curve and crack propagation are discussed. This work provides a novel and efficient tool for the mesoscale fracture simulation of concretelike material considering the relatively large time-step of the DEM.
Keywords
- Fracture behavior, Interfacial transition zone (ITZ), Random mesoscale structure, Rigid-block discrete-element method (RB-DEM)
ASJC Scopus subject areas
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
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In: Journal of engineering mechanics, Vol. 149, No. 2, 04022114, 02.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Rigid-Block DEM Modeling of Mesoscale Fracture Behavior of Concrete with Random Aggregates
AU - Meng, Qingxiang
AU - Xue, Haoyu
AU - Song, Hangtian
AU - Zhuang, Xiaoying
AU - Rabczuk, Timon
N1 - Funding Information: This investigation is financially supported by the National Key R&D Program of China (2018YFC0407004), the Fundamental Research Funds for the Central Universities (No. B200201059), the National Natural Science Foundation of China (Grant No. 51709089), and 111 Project.
PY - 2023/2
Y1 - 2023/2
N2 - The mesoscale structure generated in concrete plays a significant role in the mechanical properties and local failure behavior of mesoscale concrete. This work proposes a novel rigid-block discrete-element method (RB-DEM) for concrete modeling with random mesoscale structure. The results of the uniaxial compression using the RB-DEM demonstrated satisfactory agreement with experimental data. The RB-DEM does not only show satisfactory performance in simulation but also it is simple to use. The RB-DEM model can be built from any finite-element mesh generator, either open source codes or commercial software, which are readily available. The interfacial transition zone (ITZ) is modeled directly by assigning the weakened contact model or parameter at the interface between aggregate and mortar. The effects of ITZ parameters, aggregate volume fraction, and geometric shape on the stress-strain curve and crack propagation are discussed. This work provides a novel and efficient tool for the mesoscale fracture simulation of concretelike material considering the relatively large time-step of the DEM.
AB - The mesoscale structure generated in concrete plays a significant role in the mechanical properties and local failure behavior of mesoscale concrete. This work proposes a novel rigid-block discrete-element method (RB-DEM) for concrete modeling with random mesoscale structure. The results of the uniaxial compression using the RB-DEM demonstrated satisfactory agreement with experimental data. The RB-DEM does not only show satisfactory performance in simulation but also it is simple to use. The RB-DEM model can be built from any finite-element mesh generator, either open source codes or commercial software, which are readily available. The interfacial transition zone (ITZ) is modeled directly by assigning the weakened contact model or parameter at the interface between aggregate and mortar. The effects of ITZ parameters, aggregate volume fraction, and geometric shape on the stress-strain curve and crack propagation are discussed. This work provides a novel and efficient tool for the mesoscale fracture simulation of concretelike material considering the relatively large time-step of the DEM.
KW - Fracture behavior
KW - Interfacial transition zone (ITZ)
KW - Random mesoscale structure
KW - Rigid-block discrete-element method (RB-DEM)
UR - http://www.scopus.com/inward/record.url?scp=85144530196&partnerID=8YFLogxK
U2 - 10.1061/JENMDT.EMENG-6784
DO - 10.1061/JENMDT.EMENG-6784
M3 - Article
AN - SCOPUS:85144530196
VL - 149
JO - Journal of engineering mechanics
JF - Journal of engineering mechanics
SN - 0733-9399
IS - 2
M1 - 04022114
ER -