Additively manufactured three-dimensional open-cell tubular-lattice structures for balanced mechanical behaviors. (15th March 2023)

• Record Type: Journal Article
• Authors: Dong, Jianhua; Jing, Fengnian; Fan, Hualin
• Is Part Of: Engineering structures. Volume 279(2023)
• Publication Date: 2023-03-15
• Subjects: A. Open-cell tubular-lattice structures -- B. Mechanical properties -- C. Analytical modelling -- D. Mechanical testing; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2023.115627
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: An open-cell plate-lattice structure was designed and printed. Orthogonal tubular lattice structure has balanced strength and energy absorption. Local plate buckling controls the failure while global shear buckling is restrained. Abstract: Tubular structures usually have strong anisotropic mechanical behaviors. Based on ordinary tubular structure (OTS) with unidirectional tubes, a three dimensional tubular-lattice structure (TDTS) with orthogonal tubes was designed and fabricated by powder bed fusion method to balance the anisotropy in strength and energy absorption. Compression experimental results reveal that the printed TDTSs have balanced compressive and energy absorbing properties in three orthogonal directions, while the OTSs are sensitive to the loading direction. Arranging tubes in three orthogonal directions endows the TDTS balanced mechanical behaviors, effectively improved in [0 1 0] and [0 0 1] and slightly decreased in [1 0 0].