Investigation on fracture behaviour of UHPFRC using a mesoscale computational framework

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  • Ocean University of China
  • North University of China
  • Zhejiang University
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OriginalspracheEnglisch
Aufsatznummer116796
Seitenumfang22
FachzeitschriftComputer Methods in Applied Mechanics and Engineering
Jahrgang421
Frühes Online-Datum10 Feb. 2024
PublikationsstatusVeröffentlicht - 1 März 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.

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Investigation on fracture behaviour of UHPFRC using a mesoscale computational framework. / Hai, Lu; Huang, Yu Jie; Wriggers, Peter et al.
in: Computer Methods in Applied Mechanics and Engineering, Jahrgang 421, 116796, 01.03.2024.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Hai L, Huang YJ, Wriggers P, Zhang H, Li QH. Investigation on fracture behaviour of UHPFRC using a mesoscale computational framework. Computer Methods in Applied Mechanics and Engineering. 2024 Mär 1;421:116796. Epub 2024 Feb 10. doi: 10.1016/j.cma.2024.116796
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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.",
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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 . ",
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AU - Li, Qing Hua

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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.

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