Mechanical performance of fractal-like cementitious lightweight cellular structures: Numerical investigations

被引:32
|
作者
Vuong Nguyen-Van [1 ,2 ]
Wu, Changlang [1 ]
Vogel, Frank [4 ]
Zhang, Guomin [1 ]
Nguyen-Xuan, H. [2 ,3 ]
Phuong Tran [1 ]
机构
[1] RMIT Univ, Dept Civil & Infrastruct Engn, Melbourne, Vic, Australia
[2] Ho Chi Minh City Univ Technol HUTECH, CIRTech Inst, Ho Chi Minh City 700000, Vietnam
[3] Sejong Univ, Dept Architectural Engn, 209 Neungdong Ro, Seoul 05006, South Korea
[4] InuTech GmbH, D-90429 Nurnberg, Germany
基金
欧盟地平线“2020”;
关键词
Cellular cementitious structure; Fractal-like structure; Finite element method; Lightweight structure; Prefabricated construction; BEHAVIOR; CRASHWORTHINESS; CONCRETE; OPTIMIZATION; ABSORPTION; ROUGHNESS;
D O I
10.1016/j.compstruct.2021.114050
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
Cellular structures with tunable mechanical properties are promising lightweight structures for prefabricated construction. In this study, a 3D fractal structure named Menger-Sponge (MS) cube is analysed. Besides, six other alternative fractal-like structures are designed with respect to different shapes of their associated hollow sections. Finite element method (FEM) is employed to predict the structure's mechanical behaviours under a uniaxial compression load. The numerical model is validated by experimental results obtained from author's previous publication. Comparisons are made between triply periodic minimal surface (TPMS-Primitive) and the second-order MS cementitious structure, and also among other fractal structures with different hierarchies. Results indicate that the MS and Primitive blocks have similar mechanical responses. The fractal-square (FS) structures exhibit better structural performances, especially for the first and second fractal orders. Overall, this numerical investigation shows the effect of the shaped holes and thinnest cross-section area on the hierarchically porous structure.
引用
收藏
页数:19
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