Mechanical responses of titanium 3D kagome lattice structure manufactured by selective laser melting

Wei, Kai; Yang, Qidong; Ling, Bo; Xie, Haiqiong; Qu, Zhaoliang; Fang, Daining

doi:10.1016/j.eml.2018.07.001

Cited by 56 publications

(16 citation statements)

References 33 publications

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“…Cheng et al 22 compared compressive properties of foam‐based and lattice‐based cellular structures with different relative densities, indicating that the lattice‐based structures had higher specific strength. Additionally, various studies focusing on the influence of different types of unit cell and relative density on the compressive behavior of cellular materials were carried out 23–30 . It was reported that the strength and stiffness of the structures enhance with increasing the relative density in well agreement with Gibson–Ashby law 2 .…”

Section: Introductionmentioning

confidence: 72%

Quasi‐static compression and compression–compression fatigue behavior of regular and irregular cellular biomaterials

Raghavendra

Molinari

Cao

et al. 2021

Fatigue Fract Eng Mat Struct

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The main aim of the current study is to evaluate the compressive quasi‐static and fatigue properties of titanium alloy (Ti6Al4V) cellular materials, with different topologies, manufactured via laser powder bed fusion (LPBF) process. The topologies herein considered are lattice‐based regular and irregular configurations of cubic, star, and cross‐shaped unit cell along with trabecular‐based topology. The results have indicated that the effective stiffness of all configurations are in the range of 0.3–20 GPa, which is desirable for implant applications. The morphological irregularities in the structures induce bending‐dominated behavior affecting more the topologies with vertical struts. The S–N curves normalized with respect to the yield stress indicate that the behavior of star regular structures is between purely stretching‐dominated cubic and purely bending‐dominated cross‐based structures. Trabecular structures have shown desirable quasi‐static and fatigue properties despite the random distribution of struts.

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Section: Introductionmentioning

confidence: 72%

Quasi‐static compression and compression–compression fatigue behavior of regular and irregular cellular biomaterials

Raghavendra

Molinari

Cao

et al. 2021

Fatigue Fract Eng Mat Struct

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“…It should be underlined that the detailed process to determine the specific lattice geometry is as follows. The basic unit cells of the 3D kagome lattice [12] close to the joints are first designed in Solidworks (see Figure 3b) according to the geometry of the optimized structure presented in Figure 2a. Next, we distributed the unit cell longitudinally along the AS by carefully considering the geometric changes of the lower surface of the AS.…”

Section: Resultsmentioning

confidence: 99%

“…Because of the use of the core, the whole structure can exhibit high mechanical performance using normally low-strength material. Various cores have been proposed, e.g., tetrahedron [11], 3D kagome [12], pyramid [13], honeycomb [14], origami [15], etc. Notice that the advantages and drawbacks of these cores are not covered in this work and readers are referred to review papers [16,17] and references therein.…”

Section: Introductionmentioning

confidence: 99%

Topological Design of a Lightweight Sandwich Aircraft Spoiler

Liu

et al. 2019

Materials

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In this study, a lightweight sandwich aircraft spoiler (AS) with a high stiffness-to-weight ratio was designed. Excellent mechanical properties were achieved by the synthetic use of topology optimization (TO), lattice structure techniques, and high-performance materials, i.e., titanium alloy and aluminum alloy. TO was first utilized to optimize the traditional aircraft spoiler to search for the stiffest structure with a limited material volume, where titanium alloy and aluminum alloy were used for key joints and other parts of the AS, respectively. We then empirically replaced the fine features inside the optimized AS with 3D kagome lattices to support the shell, resulting in a lightweight sandwich AS. Numerical simulations were conducted to show that the designed sandwich AS exhibited good mechanical properties, e.g., high bending rigidity, with a reduction in weight by approximately 80% when compared with that of the initial design model. Finally, we fabricated the designed model with photosensitive resin using a 3D printing technique.

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“…The study involved experimental and numerical simulations while indicated a buckling failure followed by fracture of struts. 30,31 Xiao et al. studied the static and dynamic properties graded lattice structure and they show an increased collapse strength and energy absorption.…”

Section: Introductionmentioning

confidence: 99%

Tension-compression asymmetric mechanical behaviour of lattice cellular structures produced by selective laser melting

Raghavendra

Molinari

Fontanari

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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Additive manufacturing is an evolving technology for fabricating porous structures used in a broad array of applications, ranging from the aerospace industry to biomedical engineering. Porous titanium alloy (Ti6Al4V) structures play a major role in biomedical implants and are preferred over conventional solid implants because their properties can be tailored to obtain the stiffness required to avoid stress shielding and improve osteointegration. The mechanical properties of these structures are dependent on unit cell topology and overall porosity. In the present work, three open cellular configurations were studied, namely regular (square), irregular (skewed square) and fully random structures, at three different porosity levels. The samples were manufactured using the selective laser melting of spherical Ti6Al4V powder. The deviations of manufactured samples from as designed were assessed using morphological characterisations and porosity analyses. The mechanical characterisations of the samples included monotonic and cyclic tensile tests, along with conventional compression tests under monotonic and cyclic conditions. The results from the study indicate a clear deviation of thickness values from as-designed values. The effect of inclination of the strut with respect to the loading axis has been studied in compression samples. The off-axis loading in compression led to the asymmetry in the Young's modulus in compression and tension. These led to finite element modelling of structures in the elastic regime and its validation using Gibson–Ashby model for cellular structures.

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Mechanical responses of titanium 3D kagome lattice structure manufactured by selective laser melting

Cited by 56 publications

References 33 publications

Quasi‐static compression and compression–compression fatigue behavior of regular and irregular cellular biomaterials

Quasi‐static compression and compression–compression fatigue behavior of regular and irregular cellular biomaterials

Topological Design of a Lightweight Sandwich Aircraft Spoiler

Tension-compression asymmetric mechanical behaviour of lattice cellular structures produced by selective laser melting

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