Details
| Original language | English |
|---|---|
| Article number | 116796 |
| Number of pages | 22 |
| Journal | Computer Methods in Applied Mechanics and Engineering |
| Volume | 421 |
| Early online date | 10 Feb 2024 |
| Publication status | Published - 1 Mar 2024 |
Abstract
Ultra high performance fibre reinforced concrete (UHPFRC) demonstrates intricate failure mechanisms like fibre bending and yielding, mortar cracking, crushing and spalling, as well as fibre-mortar interfacial debonding. These are often beyond the resolutions of conventional experiments as well as homogeneous models and motivate the need for more refined models. This study develops a novel computational framework to elucidate the various mesoscale failure mechanisms of UHPFRC that can occur concurrently or consecutively. A bi-scalar damage-plasticity model (Wu-Li model) is employed to efficiently capture the failure characteristics of mortar. Nonlinear cohesive elements are inserted between fibres and mortar to explicitly simulate the interfacial bonding and debonding behaviour. The UHPFRC models are validated by pullout tests of single steel fibres with different inclination angles and direct tensile tests of UHPFRC samples with many oriented/un-oriented fibres. Afterwards, this work conducts comprehensive parametric analyses to quantify the influences of key material and geometric properties. The developed framework holds promise to enhance the understanding of UHPFRC damage and fracture behaviour.
Keywords
- Cohesive zone model, Damage-plasticity model, Interfacial behaviour, Mesoscale damage and fracture, Ultra high performance concrete
ASJC Scopus subject areas
- Engineering(all)
- Computational Mechanics
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
- Physics and Astronomy(all)
- Computer Science(all)
- Computer Science Applications
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Computer Methods in Applied Mechanics and Engineering, Vol. 421, 116796, 01.03.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Investigation on fracture behaviour of UHPFRC using a mesoscale computational framework
AU - Hai, Lu
AU - Huang, Yu Jie
AU - Wriggers, Peter
AU - Zhang, Hui
AU - Li, Qing Hua
N1 - Funding Information: This work is funded by National Natural Science Foundation of China ( 52208296 ), Fundamental Research Program of Shanxi Province ( 202203021212132 and 202203021212142 ) and “Overseas Training Program for Young Talents” of Ocean University of China . The author Peter Wriggers gratefully acknowledges support for this research by the “ German Research Foundation” (DFG) in the PRIORITY PROGRAM SPP 2020 , project WR 19/58-2 .
PY - 2024/3/1
Y1 - 2024/3/1
N2 - Ultra high performance fibre reinforced concrete (UHPFRC) demonstrates intricate failure mechanisms like fibre bending and yielding, mortar cracking, crushing and spalling, as well as fibre-mortar interfacial debonding. These are often beyond the resolutions of conventional experiments as well as homogeneous models and motivate the need for more refined models. This study develops a novel computational framework to elucidate the various mesoscale failure mechanisms of UHPFRC that can occur concurrently or consecutively. A bi-scalar damage-plasticity model (Wu-Li model) is employed to efficiently capture the failure characteristics of mortar. Nonlinear cohesive elements are inserted between fibres and mortar to explicitly simulate the interfacial bonding and debonding behaviour. The UHPFRC models are validated by pullout tests of single steel fibres with different inclination angles and direct tensile tests of UHPFRC samples with many oriented/un-oriented fibres. Afterwards, this work conducts comprehensive parametric analyses to quantify the influences of key material and geometric properties. The developed framework holds promise to enhance the understanding of UHPFRC damage and fracture behaviour.
AB - Ultra high performance fibre reinforced concrete (UHPFRC) demonstrates intricate failure mechanisms like fibre bending and yielding, mortar cracking, crushing and spalling, as well as fibre-mortar interfacial debonding. These are often beyond the resolutions of conventional experiments as well as homogeneous models and motivate the need for more refined models. This study develops a novel computational framework to elucidate the various mesoscale failure mechanisms of UHPFRC that can occur concurrently or consecutively. A bi-scalar damage-plasticity model (Wu-Li model) is employed to efficiently capture the failure characteristics of mortar. Nonlinear cohesive elements are inserted between fibres and mortar to explicitly simulate the interfacial bonding and debonding behaviour. The UHPFRC models are validated by pullout tests of single steel fibres with different inclination angles and direct tensile tests of UHPFRC samples with many oriented/un-oriented fibres. Afterwards, this work conducts comprehensive parametric analyses to quantify the influences of key material and geometric properties. The developed framework holds promise to enhance the understanding of UHPFRC damage and fracture behaviour.
KW - Cohesive zone model
KW - Damage-plasticity model
KW - Interfacial behaviour
KW - Mesoscale damage and fracture
KW - Ultra high performance concrete
UR - http://www.scopus.com/inward/record.url?scp=85184660624&partnerID=8YFLogxK
U2 - 10.1016/j.cma.2024.116796
DO - 10.1016/j.cma.2024.116796
M3 - Article
AN - SCOPUS:85184660624
VL - 421
JO - Computer Methods in Applied Mechanics and Engineering
JF - Computer Methods in Applied Mechanics and Engineering
SN - 0045-7825
M1 - 116796
ER -