The compression performance of 3D-printed X structures. (December 2022)

• Record Type: Journal Article
• Authors: Ye, Gaoyuan; Bi, Hongjie; Chen, Boyuan; Li, Zelong; Yong, Qiwen; Hu, Yingcheng
• Is Part Of: Materials & design. Volume 224(2022)
• Publication Date: 2022-12
• Subjects: Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2022.111380
• Languages: English
• ISSNs: 0264-1275

Abstract

Graphical abstract: Highlights: Compared with horizontally and perpendicularly printed X structures, vertically printed X structures had higher strength and elastic modulus. In structures with different filling angles, X structures of 60°/150° filling angle didn't break and had higher force in the platform stage. The inclination angle of struts exhibited the greatest impact on elastic modulus, specific strength, and specific stiffness of structures. 3D-printed X structures had excellent energy absorption capacity, which could be used as structures for building energy absorbers. Abstract: To enhance the compressive properties of lattice structures, this paper proposes a fused deposition method of three-dimensional (3D) printing to prepare lattice structures and investigate the effect of different printing and structural parameters on structural compression performance. Based on compression tests, vertically printed X structures with a filling angle perpendicular to the strut length and along the strut length are selected. The effect of strut diameter, strut length, and strut inclination angle on the compressive properties was explored. From the results obtained, the slenderness ratio of struts significantly influenced failure modes of structures and a densification stage occurred only when the slenderness ratio was greater than 0.175. The factors that showed the largest influence on strength and specific strength were strut length and strut inclination angle and the highest strength and specific strength were 8.57 MPa and 53.6 MPa/(g/cm 3 ), respectively. In addition, theoretical analysis and finite-element method simulations are performed to investigate the compression performance of the 3D-printed structures and a post-failure model is proposed. It was found that 3D-printed X structures exhibited superior specific strength, specific stiffness, and energy absorption capacity. This study is of guiding significance for improving the compressing and energy absorption performances of 3D-printed lattice structures.