Details
| Original language | English |
|---|---|
| Pages (from-to) | 417-446 |
| Number of pages | 30 |
| Journal | Computers, Materials and Continua |
| Volume | 57 |
| Issue number | 3 |
| Publication status | Published - 2018 |
Abstract
The microcapsule-enabled cementitious material is an appealing building material and it has been attracting increasing research interest. By considering microcapsules as dissimilar inclusions in the material, this paper employs the discrete element method (DEM) to study the effects of loading rates on the fracturing behavior of cementitious specimens containing the inclusion and the crack. The numerical model was first developed and validated based on experimental results. It is then used to systematically study the initiation, the propagation and the coalescence of cracks in inclusion-enabled cementitious materials. The study reveals that the crack propagation speed, the first crack initiation stress, the coalescence stress, the compressive strength and the ultimate strain increase with the loading rate. The initiation position, the propagation direction, the cracking length and the type of the initiated cracks are influenced by the loading rates. Two new crack coalescence patterns are observed. It is easier to cause the coalescence between the circular void and a propagating crack at a slow loading rate than at a fast loading rate.
Keywords
- Compressive loading, Cracking processes, DEM, Loading rate, Microcapsule
ASJC Scopus subject areas
- Materials Science(all)
- Biomaterials
- Mathematics(all)
- Modelling and Simulation
- Engineering(all)
- Mechanics of Materials
- Computer Science(all)
- Computer Science Applications
- Engineering(all)
- Electrical and Electronic Engineering
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In: Computers, Materials and Continua, Vol. 57, No. 3, 2018, p. 417-446.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Characterization of loading rate effects on the interactions between crack growth and inclusions in cementitious material
AU - Zhou, Shuai
AU - Zhuang, Xiaoying
N1 - Acknowledgement: This work was supported by Sofa-Kovalevskaja-Award of Alexander von Humboldt-Foundation.
PY - 2018
Y1 - 2018
N2 - The microcapsule-enabled cementitious material is an appealing building material and it has been attracting increasing research interest. By considering microcapsules as dissimilar inclusions in the material, this paper employs the discrete element method (DEM) to study the effects of loading rates on the fracturing behavior of cementitious specimens containing the inclusion and the crack. The numerical model was first developed and validated based on experimental results. It is then used to systematically study the initiation, the propagation and the coalescence of cracks in inclusion-enabled cementitious materials. The study reveals that the crack propagation speed, the first crack initiation stress, the coalescence stress, the compressive strength and the ultimate strain increase with the loading rate. The initiation position, the propagation direction, the cracking length and the type of the initiated cracks are influenced by the loading rates. Two new crack coalescence patterns are observed. It is easier to cause the coalescence between the circular void and a propagating crack at a slow loading rate than at a fast loading rate.
AB - The microcapsule-enabled cementitious material is an appealing building material and it has been attracting increasing research interest. By considering microcapsules as dissimilar inclusions in the material, this paper employs the discrete element method (DEM) to study the effects of loading rates on the fracturing behavior of cementitious specimens containing the inclusion and the crack. The numerical model was first developed and validated based on experimental results. It is then used to systematically study the initiation, the propagation and the coalescence of cracks in inclusion-enabled cementitious materials. The study reveals that the crack propagation speed, the first crack initiation stress, the coalescence stress, the compressive strength and the ultimate strain increase with the loading rate. The initiation position, the propagation direction, the cracking length and the type of the initiated cracks are influenced by the loading rates. Two new crack coalescence patterns are observed. It is easier to cause the coalescence between the circular void and a propagating crack at a slow loading rate than at a fast loading rate.
KW - Compressive loading
KW - Cracking processes
KW - DEM
KW - Loading rate
KW - Microcapsule
UR - http://www.scopus.com/inward/record.url?scp=85061872200&partnerID=8YFLogxK
U2 - 10.32604/cmc.2018.01742
DO - 10.32604/cmc.2018.01742
M3 - Article
AN - SCOPUS:85061872200
VL - 57
SP - 417
EP - 446
JO - Computers, Materials and Continua
JF - Computers, Materials and Continua
SN - 1546-2218
IS - 3
ER -