Energy absorption characteristics of metallic triply periodic minimal surface sheet structures under compressive loading

Zhang, Lei; Feih, S.; Daynes, Stephen; Chang, Shuai; Wang, Michael Yu; Wei, Jun; Lu, Wen Feng

doi:10.1016/j.addma.2018.08.007

Cited by 290 publications

(179 citation statements)

References 39 publications

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“…Melancon et al also calculated an increase, to a lesser degree, of 7% to 9% in diagonal and horizontal struts, respectively. Similar observations on strut orientation dependency are also observed in references [60,[65][66][67].…”

Section: Dimensional Inaccuraciessupporting

confidence: 87%

“…Cuadrado et al [63] linked deviations in strut diameter to the overall volume fraction of lattice structures, observing a volume fraction less than designed in lattice structures consisting of a significant portion of vertical struts, with the opposite occurring in designs with more horizontal struts. Zhang et al observed similar orientation-dependent thickness variations in sheet TPMS unit cells (primitive, diamond, gyroid) [60]. [18]), b incomplete fusion [52], c severe cracking causing delamination [53], d balling occurring at higher scanning speeds [54] and e spatter [55] Melancon et al [42] and Liu et al [64] observed deviations in the position of struts' axes, defining this deviation as 'strut waviness' (Fig.…”

Section: Dimensional Inaccuraciesmentioning

confidence: 82%

“…However, dimensional inaccuracies can be better understood via a local analysis of specific lattice features, such as struts, nodes, designed pores and wall thicknesses. Struts have been observed to deviate from circular cross-sections to ellipsoidal in references [59][60][61][62]. Ataee et al [61] particularly note the effect to be strongest at the ends of the struts.…”

Section: Dimensional Inaccuraciesmentioning

confidence: 99%

See 2 more Smart Citations

Review of defects in lattice structures manufactured by powder bed fusion

Echeta

Feng

Dutton

et al. 2019

Int J Adv Manuf Technol

149

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Additively manufactured lattice structures are popular due to their desirable properties, such as high specific stiffness and high surface area, and are being explored for several applications including aerospace components, heat exchangers and biomedical implants. The complexity of lattices challenges the fabrication limits of additive manufacturing processes and thus, lattices are particularly prone to manufacturing defects. This paper presents a review of defects in lattice structures produced by powder bed fusion processes. The review focuses on the effects of lattice design on dimensional inaccuracies, surface texture and porosity. The design constraints on lattice structures are also reviewed, as these can help to discourage defect formation. Appropriate process parameters, post-processing techniques and measurement methods are also discussed. The information presented in this paper contributes towards a deeper understanding of defects in lattice structures, aiming to improve the quality and performance of future designs.

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Section: Dimensional Inaccuraciessupporting

confidence: 87%

Section: Dimensional Inaccuraciesmentioning

confidence: 82%

Section: Dimensional Inaccuraciesmentioning

confidence: 99%

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Review of defects in lattice structures manufactured by powder bed fusion

Echeta

Feng

Dutton

et al. 2019

Int J Adv Manuf Technol

149

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“…The energy absorption capability of progressively failing glassy carbon nanospinodals substantially exceeds that of any other 3D architected material (Figure d). We measure 3–20 times increased specific energy absorption compared to the most advanced nanolattices, as well as larger‐scale beam‐, and shell‐based architected materials . Compared to metal foams, our nanospinodals show up to an order of magnitude increase in energy absorption capability .…”

mentioning

confidence: 97%

“…c) Energy absorption versus relative density. d) Comparison of the energy absorption with metallic foams, nanolattices, large‐scale beam‐, and shell‐based lattices …”

mentioning

confidence: 99%

Ultrahigh Energy Absorption Multifunctional Spinodal Nanoarchitectures

Izard

Bauer

Crook

et al. 2019

Small

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Nanolattices are promoted as next‐generation multifunctional high‐performance materials, but their mechanical response is limited to extreme strength yet brittleness, or extreme deformability but low strength and stiffness. Ideal impact protection systems require high‐stress plateaus over long deformation ranges to maximize energy absorption. Here, glassy carbon nanospinodals, i.e., nanoarchitectures with spinodal shell topology, combining ultrahigh energy absorption and exceptional strength and stiffness at low weight are presented. Noncatastrophic deformation up to 80% strain, and energy absorption up to one order of magnitude higher than for other nano‐, micro‐, macro‐architectures and solids, and state‐of‐the‐art impact protection structures are shown. At the same time, the strength and stiffness are on par with the most advanced yet brittle nanolattices, demonstrating true multifunctionality. Finite element simulations show that optimized shell thickness‐to‐curvature‐radius ratios suppress catastrophic failure by impeding propagation of dangerously oriented cracks. In contrast to most micro‐ and nano‐architected materials, spinodal architectures may be easily manufacturable on an industrial scale, and may become the next generation of superior cellular materials for structural applications.

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Multifunctional Mechanical Metamaterials Based on Triply Periodic Minimal Surface Lattices

2019

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In nature, cellular materials exhibit enhanced multifunctionalities driven mainly by their sophisticated topologies and length scales. These natural systems have inspired the development and expansion of synthetic architected materials for revolutionary applications. Consequently, both the design and synthesis techniques gained considerable attention and have massively progressed over the last few decades. Such materials with topology-controlled properties are commonly known as "metamaterials." Architected materials with topologies based on triply periodic minimal surfaces (TPMS) which are of particular interest have attracted much attention recently due to their mathematically controlled fascinating topologies and their exhibited physical and mechanical properties. Herein, the design, synthesis, and use of TPMS in the field of metamaterials and metacomposites for several applications are focused upon. The design process to create TPMS-based 3D lattices is summarized and the different manufacturing processes used to fabricate these lattices are highlighted. Herein, the materialtopology-mechanical properties relationship of different TPMS-based lattices that are investigated in the literature is discussed. A further objective is to highlight the applications where TPMS-based lattices or composites can be efficiently used as well as the research areas to be explored. development of macro/micro/nanomechanics-based constitutive models and computational tools that can be used effectively in guiding the design of advanced materials. He is particularly active in using digital design and 3D printing for creating multifunctional architected materials and composites for various applications.

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Energy absorption characteristics of metallic triply periodic minimal surface sheet structures under compressive loading

Cited by 290 publications

References 39 publications

Review of defects in lattice structures manufactured by powder bed fusion

Review of defects in lattice structures manufactured by powder bed fusion

Ultrahigh Energy Absorption Multifunctional Spinodal Nanoarchitectures

Multifunctional Mechanical Metamaterials Based on Triply Periodic Minimal Surface Lattices

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