Effective design and simulation of surface-based lattice structures featuring volume fraction and cell type grading

Maskery, Ian; Aremu, Adedeji; Parry, Luke A.; Wildman, Ricky D.; Tuck, Christopher; Ashcroft, Ian

doi:10.1016/j.matdes.2018.05.058

Cited by 254 publications

(122 citation statements)

References 39 publications

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“…The next section demonstrates how the optimized processing parameters can be used to form complex structures that would not be achievable with standard glass processing methods. Lattice structures, designed from the previous trials using the in‐house software Flatt_Pack, were successfully produced in different configurations. Examples of 10 × 10 × 10 mm 3 BCC, gyroid matrix, gyroid network, and diamond network lattices are shown in Figure B.…”

Section: Resultsmentioning

confidence: 99%

“…Such structures are finding increasing academic interest and industrial application due to their unique properties for example, lightweight nature, high surface to volume ratio and energy‐absorbing properties. Additionally, AM of lattice structures enables the control of cell geometry, grading, and conformance to external geometries not achievable with any other manufacturing method . However, to date these structures have been made from metal, polymer, or ceramic processing methods.…”

Section: Resultsmentioning

confidence: 99%

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Additive manufacturing of glass with laser powder bed fusion

et al. 2019

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Its transparency, esthetic appeal, chemical inertness, and electrical resistivity make glass an excellent candidate for small-and large-scale applications in the chemical, electronics, automotive, aerospace, and architectural industries. Additive manufacturing of glass has the potential to open new possibilities in design and reduce costs associated with manufacturing complex customized glass structures that are difficult to shape with traditional casting or subtractive methods. However, despite the significant progress in the additive manufacturing of metals, polymers, and ceramics, limited research has been undertaken on additive manufacturing of glass. In this study, a laser powder bed fusion method was developed for soda lime silica glass powder feedstock. Optimization of laser processing parameters was undertaken to define the processing window for creating three-dimensional multilayer structures.These findings enable the formation of complex glass structures with micro-or macroscale resolution. Our study supports laser powder bed fusion as a promising method for the additive manufacturing of glass and may guide the formation of a new generation of glass structures for a wide range of applications. K E Y W O R D Sadditive manufacturing, glass, lasers, powders, printing, soda-lime-silicaThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Additive manufacturing of glass with laser powder bed fusion

et al. 2019

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“…The 3D models were made of 5 × 5 × 5 cells. Previous studies [23,24] have shown that many properties of a porous scaffold and, in particular, the elastic modulus, can be numerically predicted by considering a lower amount of unit cells, rather than the whole structure. It has been shown that there is no benefit to model structures greater than 5 3 cells; in fact, the difference between the value of convergence of the simulation and the calculated value is, in percentage, negligible.…”

Section: Resultsmentioning

confidence: 99%

Porous Scaffold Design Based on Minimal Surfaces: Development and Assessment of Variable Architectures

Ambu

Morabito

2018

Symmetry

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In tissue engineering, biocompatible porous scaffolds that try to mimic the features and function of the bone are of great relevance. In this paper, an effective method for the design of 3D porous scaffolds is applied to the modelling of structures with variable architectures. These structures are of interest since they are more similar to the stochastic configuration of real bone with respect to architectures made of a unit cell replicated in three orthogonal directions, which are usually considered for this kind of applications. This property configures them as, potentially, more suitable to satisfy simultaneously the biological requirements and those relative to the mechanical strength. The procedure implemented is based on the implicit surface modelling method and the use of a triply periodic minimal surface (TPMS), specifically, the Schwarz's Primitive (P) minimal surface, whose geometry was considered for the development of scaffolds with different configurations. The representative structures modelled were numerically analysed by means of finite element analysis (FEA), considering them made of a biocompatible titanium alloy. The architectures considered were thus assessed in terms of the relationship between the geometrical configuration and the mechanical response to compression loading. taken into account. Biodegradable polymeric materials have been considered [3] to facilitate cell ingrowth due to material resorption over time along with the adequate mechanical environment provided by the structure of the scaffold. For load bearing applications investigated in this study, biocompatible metallic scaffolds are expected to fulfill the required mechanical strength. In particular, the use of titanium and its alloys, such as Ti-6Al-4V, is well reported in literature [4-6] since they have an excellent strength-to-weight ratio, toughness, and most importantly, the biocompatibility and corrosion resistance of their naturally forming surface oxide [7], making them particularly suitable for these applications.The advent of new manufacturing technologies, such as additive manufacturing (AM), has expanded the potentiality in the design of these structures since with these techniques, tailored design specification implants and highly complex and custom-fitting medical devices can be provided [8].The modelling of these structures can be conducted with different approaches. The simpler approach uses parametric Computer-Aided Design (CAD) modelling in which a unit cell is generated from solid features that are combined together. A three-dimensional (3D) periodic array of the unit cell can be carried out along three mutually perpendicular directions to obtain the final architecture. Usually, lattice-based geometries [5,6,9] such as cubic, diamond lattice, rhombic dodecahedron, or similar, are generated with this method since more complex geometries are difficult to model.Another approach, which was used in this paper, is the method of implicit surface modelling (ISM). ISM is a highly flexible approach for the generation ...

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“…To design the gradient triply periodic minimal surfaces structure, Maskery et al [130] used two strategies, changing the rod diameter and hybridizing different unit cell types, which create a gradient of minimal surface structure. Similarly, Vijayavenkataraman et al [131] applied gradient strategies (changing rod diameter, cell size, and unit cell type) to three TPMSs (P, G, and D surface) to achieve the design of the biomimetic implants, which are satisfied with multiple requirements like porosity, modulus and pore size etc.…”

Section: Gradient Structure Designmentioning

confidence: 99%

“…Ti-6Al-4V/EBM [123] Ti-6Al-4V/SLM [124] Fine molding quality; appropriate modulus; high energy absorption. Vary in cell types [130,131,137] Varied in unit cell type, different areas have different topologies; non-stationary transitions between different layers.…”

Section: Vary In Cell Sizementioning

confidence: 99%

Additive Manufacturing of Customized Metallic Orthopedic Implants: Materials, Structures, and Surface Modifications

Bai

Cheng

Chen

et al. 2019

Metals

107

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Metals have been used for orthopedic implants for a long time due to their excellent mechanical properties. With the rapid development of additive manufacturing (AM) technology, studying customized implants with complex microstructures for patients has become a trend of various bone defect repair. A superior customized implant should have good biocompatibility and mechanical properties matching the defect bone. To meet the performance requirements of implants, this paper introduces the biomedical metallic materials currently applied to orthopedic implants from the design to manufacture, elaborates the structure design and surface modification of the orthopedic implant. By selecting the appropriate implant material and processing method, optimizing the implant structure and modifying the surface can ensure the performance requirements of the implant. Finally, this paper discusses the future development trend of the orthopedic implant.

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Effective design and simulation of surface-based lattice structures featuring volume fraction and cell type grading

Cited by 254 publications

References 39 publications

Additive manufacturing of glass with laser powder bed fusion

Additive manufacturing of glass with laser powder bed fusion

Porous Scaffold Design Based on Minimal Surfaces: Development and Assessment of Variable Architectures

Additive Manufacturing of Customized Metallic Orthopedic Implants: Materials, Structures, and Surface Modifications

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