Cell-size graded sandwich enhances additive manufacturing fidelity and energy absorption

Wang, Yue; Liu, Fei; Zhang, Xinyue; Zhang, Kaifei; Wang, Xin; Gan, Daoqi; Yang, Baiyin

doi:10.1016/j.ijmecsci.2021.106798

Cited by 42 publications

(10 citation statements)

References 54 publications

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“…4,34,36 The mechanical properties of the lattice structures are influenced by several factors that include, not only the unit cell topology, but also the cell material properties, loading and boundary conditions, strut dimensions and relative density. 2,9,[17][18][19]26,29,[31][32][33][34] For example, lattices fabricated in ceramic materials with cubic and diamond structures provide high stiffness under compressive and bending loadings and may have the potential to be the best choice as cores in the sandwich panels. 37 Lattice structures are difficult to obtain through conventional manufacturing, so they are obtained by means of additive procedures.…”

Section: Introductionmentioning

confidence: 99%

“…14 Other categories of lattices include triply periodic minimal surfaces (TPMS), 34 corrugated trusses 35 and lattices with gradients of properties. 4,34,36…”

Section: Introductionmentioning

confidence: 99%

“…9,12,[19][20][21] Several examples of space-filling lattice structures can be found in the literature, based on various unit cells such as pyramidal, 22,23 diamond cubic, [24][25][26][27] octahedral, 28 circular, octagonal, Kelvin and rhombicuboctahedron, 29 Kagome, 30,31 cubic, 29,32 body centred cubic (BCC), 14,19,31,33 face centred cubic (FCC), 19,31 body centred cubic with (vertical) z-struts (BCCZ), 19 face centred cubic with (vertical) z-struts (FCCZ) 14,19 and face and body centred cubic unit cell with z-axis struts (FBCCZ). 14 Other categories of lattices include triply periodic minimal surfaces (TPMS), 34 corrugated trusses 35 and lattices with gradients of properties. 4,34,36 The mechanical properties of the lattice structures are influenced by several factors that include, not only the unit cell topology, but also the cell material properties, loading and boundary conditions, strut dimensions and relative density.…”

Section: Introductionmentioning

confidence: 99%

“…14 Other categories of lattices include triply periodic minimal surfaces (TPMS), 34 corrugated trusses 35 and lattices with gradients of properties. 4,34,36 The mechanical properties of the lattice structures are influenced by several factors that include, not only the unit cell topology, but also the cell material properties, loading and boundary conditions, strut dimensions and relative density. 2,9,[17][18][19]26,29,[31][32][33][34] For example, lattices fabricated in ceramic materials with cubic and diamond structures provide high stiffness under compressive and bending loadings and may have the potential to be the best choice as cores in the sandwich panels.…”

Section: Introductionmentioning

confidence: 99%

“…38 AM permits the manufacturing of structures featuring highly complex geometric shapes with controlled structural designs, being adequate to obtain lattice structures. 9,19,20,34 When compared with traditional manufacturing procedures, AM presents the advantages of producing parts with complex shapes, with the potential for low waste of material in a short period of time, but is not adequate for the production of large specimens or large batches of a part, and has limitations in the set of materials that can be used. 39,40 Among the types of AM material extrusion processes, fused filament fabrication (FFF) is the most common technique, in which the movement of an extrusion head or nozzle is controlled by appropriate software.…”

Section: Introductionmentioning

confidence: 99%

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Cellular lattice cores of sandwich panels fabricated by additive manufacturing: Effect of dimensions and relative density on mechanical behaviour

Pereira

Alves

Reis

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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Sandwich panels have a wide field of applications from aerospace to automotive industries. These panels are formed by a core and two layers, having the geometry of the core an important role in its mechanical properties. While the most common cores have hexagonal honeycomb structures, there is a recent trend to replace them with other cellular structures based on truss or lattice arrangements. Previous studies on modified atomic-based lattices reached the conclusion that modified body and face-centred parallelepiped, with vertical struts, denoted by the body- and face-centred parallelepiped with struts in z-axis, provided higher stiffness and absorbed energy with low weight, compared with the conventional design. These promising findings have motivated a further comprehensive investigation of this type of structure. The aim of the present study is to get the body- and face-centred parallelepiped with struts in z-axis structure that provides the highest stiffness and absorbed energy, in comparison with a previous work of the current authors, by changing its dimensions and relative density. To accomplish this purpose body- and face-centred parallelepiped with struts in z-axis lattices with three relative densities, namely, 0.25, 0.30 and 0.35 and with truss radii of 0.8, 0.92 and 1.1 mm were designed, respectively. Samples were printed by additive manufacturing of polylactic acid. The two face sheets (skins) and the core of the panel were manufactured altogether. The mechanical behaviour of the sandwich panels was assessed by three-point bending tests both experimentally and in numerical simulations with finite element analysis. A good correlation between experiments and numerical results was achieved. Simulation results revealed that the highest values of strength, stiffness and absorbed energy were obtained for the combination of the lowest relative density with the highest truss radius. A failure analysis revealed two failure modes, namely, cohesive failure and face sheet failure. Results indicate that the dimensions of the struts and the relative density affect the mechanical performance and the failure mode of the panels.

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Section: Introductionmentioning

confidence: 99%

“…14 Other categories of lattices include triply periodic minimal surfaces (TPMS), 34 corrugated trusses 35 and lattices with gradients of properties. 4,34,36…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Cellular lattice cores of sandwich panels fabricated by additive manufacturing: Effect of dimensions and relative density on mechanical behaviour

Pereira

Alves

Reis

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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Design and Strengthening Mechanisms of Dual-Phase Lattice Energy-Absorbing Structure Based On Shear-Banding Controlling

Han,

Wang,

Liu

et al. 2023

Appl Compos Mater

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Adaptive enhancement design of triply periodic minimal surface lattice structure based on non-uniform stress distribution

Zhang

Liu²,

Peng³

et al. 2023

Appl. Math. Mech.-Engl. Ed.

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The Schwarz primitive triply periodic minimal surface (P-type TPMS) lattice structures are widely used. However, these lattice structures have weak load-bearing capacity compared with other cellular structures. In this paper, an adaptive enhancement design method based on the non-uniform stress distribution in structures with uniform thickness is proposed to design the P-type TPMS lattice structures with higher mechanical properties. Two types of structures are designed by adjusting the adaptive thickness distribution in the TPMS. One keeps the same relative density, and the other keeps the same of non-enhanced region thickness. Compared with the uniform lattice structure, the elastic modulus for the structure with the same relative density increases by more than 17%, and the yield strength increases by more than 10.2%. Three kinds of TPMS lattice structures are fabricated by laser powder bed fusion (L-PBF) with 316L stainless steel to verify the proposed enhanced design. The manufacture-induced geometric deviation between the as-design and as-printed models is measured by micro X-ray computed tomography (µ-CT) scans. The quasi-static compression experimental results of P-type TPMS lattice structures show that the reinforced structures have stronger elastic moduli, ultimate strengths, and energy absorption capabilities than the homogeneous P-TPMS lattice structure.

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Cell-size graded sandwich enhances additive manufacturing fidelity and energy absorption

Cited by 42 publications

References 54 publications

Cellular lattice cores of sandwich panels fabricated by additive manufacturing: Effect of dimensions and relative density on mechanical behaviour

Cellular lattice cores of sandwich panels fabricated by additive manufacturing: Effect of dimensions and relative density on mechanical behaviour

Design and Strengthening Mechanisms of Dual-Phase Lattice Energy-Absorbing Structure Based On Shear-Banding Controlling

Adaptive enhancement design of triply periodic minimal surface lattice structure based on non-uniform stress distribution

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