A bio-inspired solution to alleviate anisotropy of 3D printed engineered cementitious composites (3DP-ECC): Knitting/tilting filaments

被引：18

作者：

Zhou, Wen ^{[1
]}

Mcgee, Wes ^{[2
]}

Gokce, H. Suleyman ^{[3
]}

Li, Victor C. ^{[1
]}

机构：

[1] Univ Michigan, Dept Civil & Environm Engn, Ann Arbor, MI 48109 USA

[2] Univ Michigan, Taubman Coll Architecture & Urban Planning, Ann Arbor, MI 48109 USA

[3] Bayburt Univ, Dept Civil Engn, TR-69010 Bayburt, Turkiye

来源：

AUTOMATION IN CONSTRUCTION | 2023年 / 155卷

关键词：

3D printed engineered cementitious composites (3DP-ECC); Anisotropy; Knitting; Flexural property; Interface; HARDENED PROPERTIES; CONCRETE; STRENGTH; PERFORMANCE; EXTRUSION; DESIGN; SHELL;

D O I：

10.1016/j.autcon.2023.105051

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Widely reported anisotropy in 3D printed cementitious structures has been a primary concern to structural integrity, especially for fiber-reinforced cementitious material, e.g., engineered cementitious composites (ECC). To alleviate the anisotropy present in 3D printed ECC (3DP-ECC), two innovative printing patterns, "knitting" and "tilting" filaments, were proposed, mimicking the natural crossed-lamellar structure of conch shells. 3D spatial paths were designed to allocate tensile/flexural resistance to multiple directions and to create an interwoven interface system to strengthen the structure. Four-point bending tests loading from three different directions were conducted. It was found that knitted and tilted filaments revealed superior or comparable bending performance to cast ECC in two favorable orientations. Furthermore, flexural performance in the weakest orientation was notably improved by knitting and tilting, with up-to-179% increases in flexural strength compared with that of parallel filaments. This novel approach holds great promise in alleviating anisotropy of 3DP-ECC without introducing additional reinforcement.

引用

页数：17

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