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作者:

Wang, Man (Wang, Man.) | Li, Liang (Li, Liang.) | Ma, Jianjun (Ma, Jianjun.) | Wu, Jun (Wu, Jun.) | Du, Xiuli (Du, Xiuli.)

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EI Scopus

摘要:

Fiber-Reinforced Cementitious Composites (FRCC) have gained significant attention in engineering applications due to their superior mechanical properties and toughness, particularly under high strain rate conditions. This study performed dynamic tensile tests on FRCC at high strain rates (35–110 s⁻¹) using a Split Hopkinson Tensile Bar (SHTB) apparatus. Additionally, a novel Peridynamic (PD) model was developed for the SHTB and FRCC system, leveraging the advanced capabilities of the emerging PD theory. The study compared and analyzed dynamic tensile strength, ultimate tensile strain, strain rate effects, failure modes, and crack development in FRCC with different fiber ratios at various high strain rates, using both experimental data and PD simulations. The results show that the PD-SHTB-FRCC dynamic model developed in this study exhibits high consistency between numerical simulations and experimental findings, effectively capturing the processes of crack initiation, propagation, and complete failure in FRCC specimens. The dynamic tensile properties of FRCC improve significantly with increased strain rates, with polyethylene (PE) fibers providing superior reinforcement compared to steel fibers. Notably, the dynamic tensile strength, peak tensile stress, and ultimate tensile strain of FRCC increase significantly with rising strain rates, with specimens containing higher PE fiber content showing a more pronounced enhancement effect. For strain rates between 42.6 s⁻¹ and 76.1 s⁻¹, considering dynamic tensile strength, ultimate tensile strain, and peak tensile stress, the optimal combination for resisting dynamic tensile loads was 1.5 % PE fibers and 0.5 % steel fibers. At a strain rate of 99.8 s⁻¹, a 2 % PE fiber ratio alone provided the best performance. © 2024 Elsevier Ltd

关键词:

Tensile testing Fiber reinforced plastics Cracks Tensile stress Shear strain Strain rate Tensile strength Tensile strain

作者机构:

  • [ 1 ] [Wang, Man]Key Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Ministry of Education, Beijing, 100124, China
  • [ 2 ] [Li, Liang]Key Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Ministry of Education, Beijing, 100124, China
  • [ 3 ] [Ma, Jianjun]School of Civil Engineering and Architecture, Henan University of Science and Technology, Henan, Luoyang; 471023, China
  • [ 4 ] [Wu, Jun]School of Civil Engineering, Shanghai Normal University, Shanghai, 201418, China
  • [ 5 ] [Du, Xiuli]Key Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Ministry of Education, Beijing, 100124, China

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来源 :

International Journal of Impact Engineering

ISSN: 0734-743X

年份: 2025

卷: 196

5 . 1 0 0

JCR@2022

被引次数:

WoS核心集被引频次:

SCOPUS被引频次: 2

ESI高被引论文在榜: 0 展开所有

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