Investigation on fracture behaviour of UHPFRC using a mesoscale computational framework

authored by: Lu Hai, Yu Jie Huang, Peter Wriggers, Hui Zhang, Qing Hua Li
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.
Organisation(s): Institute of Continuum Mechanics
External Organisation(s): Ocean University of China
North University of China
Zhejiang University
Type: Article
Journal: Computer Methods in Applied Mechanics and Engineering
Volume: 421
No. of pages: 22
ISSN: 0045-7825
Publication date: 01.03.2024
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Computational Mechanics, Mechanics of Materials, Mechanical Engineering, Physics and Astronomy(all), Computer Science Applications
Electronic version(s): https://doi.org/10.1016/j.cma.2024.116796 (Access: Closed)
: Details in the research portal "Research@Leibniz University"

BibTeX

@article{95338cefa4df417185806afc6e403baf,
title = "Investigation on fracture behaviour of UHPFRC using a mesoscale computational framework",
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",
author = "Lu Hai and Huang, {Yu Jie} and Peter Wriggers and Hui Zhang and Li, {Qing Hua}",
note = "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 . ",
year = "2024",
month = mar,
day = "1",
doi = "10.1016/j.cma.2024.116796",
language = "English",
volume = "421",
journal = "Computer Methods in Applied Mechanics and Engineering",
issn = "0045-7825",
publisher = "Elsevier",
}