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Mechanical properties of structures 3D printed with cementitious powders
Graphical abstract Display Omitted
Highlights 3D specimens printed with cementitious materials are orthotropic. Mechanical properties and failure depend on inter-layer and inter-strip bonds. Stress–strain relationship and failure criterion proposed for 3D printed materials. Behavior of 3D printed structures depends strongly on the printing direction.
Abstract The three dimensional (3D) printing technology has undergone rapid development in the last few years and it is now possible to print engineering structures. This paper presents a study of the mechanical behavior of 3D printed structures using cementitious powder. Microscopic observation reveals that the 3D printed products have a layered orthotropic microstructure, in which each layer consists of parallel strips. Compression and flexural tests were conducted to determine the mechanical properties and failure characteristics of such materials. The test results confirmed that the 3D printed structures are laminated with apparent orthotropy. Based on the experimental results, a stress–strain relationship and a failure criterion based on the maximum stress criterion for orthotropic materials are proposed for the structures of 3D printed material. Finally, a finite element analysis was conducted for a 3D printed shell structure, which shows that the printing direction has a significant influence on the load bearing capacity of the structure.
Mechanical properties of structures 3D printed with cementitious powders
Graphical abstract Display Omitted
Highlights 3D specimens printed with cementitious materials are orthotropic. Mechanical properties and failure depend on inter-layer and inter-strip bonds. Stress–strain relationship and failure criterion proposed for 3D printed materials. Behavior of 3D printed structures depends strongly on the printing direction.
Abstract The three dimensional (3D) printing technology has undergone rapid development in the last few years and it is now possible to print engineering structures. This paper presents a study of the mechanical behavior of 3D printed structures using cementitious powder. Microscopic observation reveals that the 3D printed products have a layered orthotropic microstructure, in which each layer consists of parallel strips. Compression and flexural tests were conducted to determine the mechanical properties and failure characteristics of such materials. The test results confirmed that the 3D printed structures are laminated with apparent orthotropy. Based on the experimental results, a stress–strain relationship and a failure criterion based on the maximum stress criterion for orthotropic materials are proposed for the structures of 3D printed material. Finally, a finite element analysis was conducted for a 3D printed shell structure, which shows that the printing direction has a significant influence on the load bearing capacity of the structure.
Mechanical properties of structures 3D printed with cementitious powders
Feng, Peng (author) / Meng, Xinmiao (author) / Chen, Jian-Fei (author) / Ye, Lieping (author)
Construction and Building Materials ; 93 ; 486-497
2015-05-30
12 pages
Article (Journal)
Electronic Resource
English
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