Tensile response of hybrid fiber-reinforced coral concrete(HFRCC) under quasi-static and medium-high strain rate conditions: An experimental and numerical study

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-05-21 DOI:10.1016/j.powtec.2025.121158

Ruiqi Guo , Jiwei Wang , Linmei Lyu , Zhilin Long , Fu Xu , Jiangnan Li , Runlin Wang

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引用次数: 0

Abstract

This study investigates the tensile behavior of hybrid fiber-reinforced coral concrete (HFRCC) under quasi-static and dynamic loading conditions. A Split Hopkinson Pressure Bar (SHPB) system combined with high-speed photography was employed to analyze the damage evolution of the specimens. The results demonstrate that with increasing strain rate, the dynamic splitting tensile strength, energy dissipation capacity, and toughness of HFRCC are significantly enhanced. The HFRCC incorporating 1.5 % carbon fibers (CF) and 1.5 % 316 L stainless steel fibers (SSF) exhibited the best performance. Scanning electron microscopy (SEM) analysis revealed that CF primarily suppresses microcrack formation, while SSF effectively delays the propagation of macrocracks, exhibiting a notable synergistic toughening effect. Numerical simulation results based on the K&C constitutive model were in close agreement with the experimental data, validating the experimental conclusions. The combined use of CF and SSF significantly improves both the strength and ductility of coral concrete, offering a promising material solution for impact-resistant structures in island and marine engineering.

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准静态和中高应变率条件下混杂纤维增强珊瑚混凝土（HFRCC）的拉伸响应：实验与数值研究

本文研究了混合纤维增强珊瑚混凝土（HFRCC）在准静态和动态加载条件下的拉伸性能。采用分离式霍普金森压杆（Split Hopkinson Pressure Bar， SHPB）系统结合高速摄影技术对试件的损伤演化进行了分析。结果表明：随着应变速率的增大，HFRCC的动劈裂抗拉强度、耗能能力和韧性均显著增强；含1.5%碳纤维（CF）和1.5% 316l不锈钢纤维（SSF）的HFRCC表现出最好的性能。扫描电镜（SEM）分析表明，CF主要抑制微裂纹的形成，而SSF有效延缓宏观裂纹的扩展，表现出显著的协同增韧效应。基于K&；C本构模型的数值模拟结果与实验数据吻合较好，验证了实验结论。CF和SSF的联合使用显著提高了珊瑚混凝土的强度和延性，为岛屿和海洋工程中的抗冲击结构提供了一种有前途的材料解决方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.