Design, mechanical properties, and optimization of BCC lattice structures with taper struts

Zhao, Miao; Zhang, Zhengwen; Li, Zhonghua; Zhang, Tao; Zhou, Hailun; Ren, Zhihao

doi:10.1016/j.compstruct.2022.115830

Cited by 68 publications

(19 citation statements)

References 52 publications

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“…[ 8 ] Zhao et al proposed a BCC lattice structure with tapered struts and found that the presence of tapered struts not only reduced the anisotropy of the lattice structure, but also increased the Young's modulus by 67%. [ 9 ] Liu et al designed and manufactured a node‐reinforced BCC lattice structure, whose uniaxial compression experimental and finite‐element results showed that its yield strength and collapse strength were more than those of the conventional BCC lattice structure. [ 10 ] Combining both experiments and finite‐element simulations, Bai et al found that both the specific elastic modulus and specific compressive strength improved by implementing curving struts in a BCC lattice structure.…”

Section: Introductionmentioning

confidence: 99%

Excellent Mechanical Properties and Energy Absorption of Hexagonal‐Body‐Centered Lattice Structure Fabricated by Selective Laser Melting

Ren,

Ran,

Nie

et al. 2023

Adv Eng Mater

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Inspired by the crystal lattice characteristics of hexagonal close‐packed and body‐centered cubic metals, a novel hexagonal body‐centered (HBC) lattice structure is constructed for energy absorption. HBC lattice structures with three different c/a ratios are prepared by selective laser melting (SLM) using 316L stainless steel powder. The geometric features and energy absorption performance of the fabricated HBC lattice structures with different c/a ratios are studied by scanning electron microscopy and quasi‐static compression tests, respectively. The results show that the HBC lattice structure prepared by SLM not only exhibits good formability, but also demonstrates excellent mechanical properties and energy absorption capacity. The c/a ratio significantly affects the mechanical properties and energy‐absorption performance of HBC lattice structures. The Young’s modulus, yield strength, and energy absorption increase as the c/a ratio decreases. Compared with other lattice structures, the HBC lattice structure exhibits better energy absorption at the same relative density, thus indicating the usefulness of the HBC lattice structure as a lightweight energy‐absorbing structure.This article is protected by copyright. All rights reserved.

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Section: Introductionmentioning

confidence: 99%

Excellent Mechanical Properties and Energy Absorption of Hexagonal‐Body‐Centered Lattice Structure Fabricated by Selective Laser Melting

Ren,

Ran,

Nie

et al. 2023

Adv Eng Mater

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“…The current reported lattice structures include body-centered cubic (BCC), face-centered, simple cubic, octet, diamond, rhombic dodecahedron, pyramidal, octet-truss, triply periodic minimal surface, and hybrid structures [5][6][7][8][9][10][11]. Besides the materials used for manufacturing structures, the shape and geometrical parameters of the lattice structure determine its mechanical properties, i.e., the number, orientation, and diameter of the struts [12].…”

Section: Introductionmentioning

confidence: 99%

“…Some studies improve the mechanical properties of lattice structures through the node design. A novel BCC lattice structure with tapered struts was designed to reduce the stress concentration at the nodes [6]. The results show that the structure fracture location changed from the nodes to the tapered strut center, and the elastic modulus was increased by 67%.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Performance of a Node-Reinforced Body-Centered Cubic Lattice Structure: An Equal-Strength Concept Design

Liu,

Zhao,

Tao

et al. 2023

Aerospace

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Lattice structures are characterized by a light weight, high strength, and high stiffness, and have a wide range of applications in the aerospace field. Node stress concentration is a key factor affecting the mechanical performance of lattice structures. In this paper, a new equal-strength body-centered cubic (ES-BCC) lattice structure was additively manufactured using 316L stainless steel via selective laser melting (SLM). The results of a mechanical compression test and finite element analysis revealed that the failure location of the ES-BCC structure changed from the nodes to the center of the struts. At the same density, the energy absorption, elastic modulus, and yield strength of the ES-BCC structure increased by 11.89%, 61.80%, and 53.72% compared to the BCC structure, respectively. Furthermore, the change in angle of the ES-BCC structure achieves significant changes in strength, stiffness, and energy absorption to meet different design requirements and engineering applications. The equal-strength concept design can be applied as a general design method to the design of other lightweight energy-absorbing lattice structures.

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“…[5][6][7][8] Periodic lattice structures have been studied extensively in engineering applications, because they can offer superior performance such as high stiffness-to-weight and excellent energy absorption than foam structures comprised of plates. [9][10][11][12] A number of previous studies have investigated the mechanical properties of octet, [13] diamond, [14] BCC, [15] and pyramidal [16] lattice structures using theoretical, numerical, and experimental techniques during the past decades.…”

Section: Introductionmentioning

confidence: 99%

Spatial Array Configuration Effect of Body‐Centered Cubic Lattice Structures with Finite Unit Cells

Liu

Ning

2022

Adv Eng Mater

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The mechanical properties lattice structures have been studied a lot due to the simple geometry. They all follow the assumption that the mechanical properties of lattice structures are identical with the corresponding unit cell. However, our experimental results show obvious boundary effect. In this paper, the spatial array configuration effect (n x , n y , n z ) of body centered cubic (BCC) lattice structures is pronounced to declare the difference. The multilayer BCC lattice structures are divided into three types which show three different deformation mechanism, and their equivalent stiffness will not converge on a unique solution. Then, the “large unit cell” assumption is proposed to theoretically predict the equivalent modulus with different array configuration. Furthermore, the failure modes of the three types are also discussed. The finding results show that the spatial array configuration also plays an important role in determining both the equivalent modulus and the failure modes for the multilayer BCC lattice structures. In addition, we conclude that the name “lattice structure” is more suitable for the current manufacturing level than the “lattice material.”

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Design, mechanical properties, and optimization of BCC lattice structures with taper struts

Cited by 68 publications

References 52 publications

Excellent Mechanical Properties and Energy Absorption of Hexagonal‐Body‐Centered Lattice Structure Fabricated by Selective Laser Melting

Excellent Mechanical Properties and Energy Absorption of Hexagonal‐Body‐Centered Lattice Structure Fabricated by Selective Laser Melting

Mechanical Performance of a Node-Reinforced Body-Centered Cubic Lattice Structure: An Equal-Strength Concept Design

Spatial Array Configuration Effect of Body‐Centered Cubic Lattice Structures with Finite Unit Cells

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