Octet-truss cellular materials for improved mechanical properties and specific energy absorption

Song, Jian; Zhou, Wentao; Wang, Yuejiao; Fan, Rong; Wang, Yinchu; Chen, Junying; Lü, Yang; Li, Lixiao

doi:10.1016/j.matdes.2019.107773

Cited by 65 publications

(23 citation statements)

References 47 publications

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“…However, most research was focused on metal foams, with isotropic properties and homogeneous lattice structure [16][17][18], since they can bear moderate load in multiple directions and are commercially available. This research goes further to include anisotropic properties of the foam in analysis of structural and thermal loads [19,20]. In addition to that, prior research was more focussed on thermal performance of the lattices during forced-convection fluid flow through them.…”

Section: Additive Manufacturing Of Polymer Latticesmentioning

confidence: 99%

Thermal performance of additively manufactured polymer lattices

Alqahtani

Ali

Farukh

et al. 2021

Journal of Building Engineering

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Section: Additive Manufacturing Of Polymer Latticesmentioning

confidence: 99%

Thermal performance of additively manufactured polymer lattices

Alqahtani

Ali

Farukh

et al. 2021

Journal of Building Engineering

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“…A subset of open-cell materials is represented by periodic trusses -structures composed of an organized set of struts. These structures are well-studied and find applications in multiple fields [6,7,8] as they provide specific functionalities, i.e, higher strength and stiffness [9,10,11]. The most well-known examples are, for instance, tetrahedral truss, pyramidal truss, octet-truss, and Kagome truss.…”

Section: Periodic Trussesmentioning

confidence: 99%

3D Periodic Cellular Materials with Tailored Symmetry and Implicit Grading

Efremov

Martínez

Lefèbvre

2021

Computer-Aided Design

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Periodic cellular materials allow triggering complex elastic behaviors within the volume of a part. In this work, we study a novel type of 3D periodic cellular materials that emerge from a growth process in a lattice. The growth is parameterized by a 3D star-shaped set at each lattice point, defining the geometry that will appear around it. Individual tiles may be computed and used in a periodic lattice, or a global structure may be produced under spatial gradations, changing the parametric star-shaped set at each lattice location.Beyond free spatial gradation, an important advantage of our approach is that elastic symmetries can easily be enforced. We show how shared symmetries between the lattice and the star-shaped set directly translate into symmetries of the periodic structures' elastic response. Thus, our approach enables restricting the symmetry of the elastic responses -monoclinic, orthorhombic, trigonal, and so on -while freely exploring a wide space of possible geometries and topologies. We make a comprehensive study of the space of symmetries and broad combinations that our method spans and demonstrate through numerical and experimental results the elastic responses triggered by our structures.

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“…Based on the tests, the characteristic mechanical properties of the designed structures, such as fatigue strength [ 31 , 32 ], yield point [ 33 ] and critical force [ 34 ], are determined. An example of the implementation of such research is presented in [ 35 , 36 ], in which the authors designed and fabricated three different octet-lattice structures of varying densities from polymer resins. The structures were printed using stereolithography (SLA).…”

Section: Introductionmentioning

confidence: 99%

Experimental Research of Selected Lattice Structures Developed with 3D Printing Technology

et al. 2022

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This paper presents the results of the experimental research of 3D structures developed with an SLA additive technique using Durable Resin V2. The aim of this paper is to evaluate and compare the compression curves, deformation process and energy-absorption parameters of the topologies with different characteristics. The structures were subjected to a quasi-static axial compression test. Five different topologies of lattice structures were studied and compared. In the initial stage of the research, the geometric accuracy of the printed structures was analysed through measurement of the diameter of the beam elements at several selected locations. Compression curves and the stress history at the minimum cross-section of each topology were determined. Energy absorption parameters, including absorbed energy (AE) and specific absorbed energy (SAE), were calculated from the compression curves. Based on the analysis of the photographic material, the failure mode was analysed, and the efficiency of the topologies was compared.

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Octet-truss cellular materials for improved mechanical properties and specific energy absorption

Cited by 65 publications

References 47 publications

Thermal performance of additively manufactured polymer lattices

Thermal performance of additively manufactured polymer lattices

3D Periodic Cellular Materials with Tailored Symmetry and Implicit Grading

Experimental Research of Selected Lattice Structures Developed with 3D Printing Technology

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