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多轴三维（3D）聚合物碳纤维/水泥基混凝土角向弯曲性能的试验研究

Experimental Study on Angular Flexural Performance of Multiaxis Three Dimensional (3D) Polymeric Carbon Fiber/Cementitious Concretes.

作者信息

Ozdemir Huseyin, Bilisik Kadir

机构信息

Vocational School of Technical Sciences, Gaziantep University, Gaziantep 27310, Turkey.

Nano/Micro Fiber Preform Design and Composite Laboratory, Department of Textile Engineering, Faculty of Engineering, Erciyes University, Talas-Kayseri 38039, Turkey.

出版信息

Polymers (Basel). 2021 Sep 11;13(18):3073. doi: 10.3390/polym13183073.

DOI:10.3390/polym13183073
PMID:34577974
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8473331/
Abstract

Multiaxis three-dimensional (3D) continuous polymeric carbon fiber/cementitious concretes were introduced. Their angular (off-axis) flexural properties were experimentally studied. It was found that the placement of the continuous carbon fibers and their in-plane angular orientations in the pristine concrete noticeably influenced the angular flexural strength and the energy absorption behavior of the multiaxis 3D concrete composite. The off-axis flexural strength of the uniaxial (C-1D-(0°)), biaxial (C-2D-(0°), and C-2D-(90°)), and multiaxial (C-4D-(0°), C-4D-(+45°) and C-4D-(-45°)) concrete composites were outstandingly higher (from 36.84 to 272.43%) than the neat concrete. Their energy absorption capacities were superior compared to the neat concrete. Fractured four directional polymeric carbon fiber/cementitious matrix concretes limited brittle matrix failure and a broom-like fracture phenomenon on the filament bundles, filament-matrix debonding and splitting, and minor filament entanglement. Multiaxis 3D polymeric carbon fiber concrete, especially the C-4D structure, controlled the crack phenomena and was considered a damage-tolerant material compared to the neat concrete.

摘要

引入了多轴三维（3D）连续聚合物碳纤维/水泥基混凝土。对其角向（离轴）弯曲性能进行了实验研究。结果发现，连续碳纤维在原始混凝土中的布置及其面内角向显著影响了多轴3D混凝土复合材料的角向弯曲强度和能量吸收行为。单轴（C-1D-(0°)）、双轴（C-2D-(0°)和C-2D-(90°)）以及多轴（C-4D-(0°)、C-4D-(+45°)和C-4D-(-45°)）混凝土复合材料的离轴弯曲强度比净混凝土显著更高（提高了36.84%至272.43%%）。与净混凝土相比，它们的能量吸收能力更优越。断裂的四向聚合物碳纤维/水泥基体混凝土限制了基体的脆性破坏以及纤维束上类似扫帚状的断裂现象、纤维-基体脱粘和劈裂，以及轻微的纤维缠结。多轴3D聚合物碳纤维混凝土，尤其是C-4D结构，控制了裂缝现象，与净混凝土相比被认为是一种耐损伤材料。

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