Design of lattice structure for additive manufacturing

Tao, Wenjin; Leu, Ming C.

doi:10.1109/isfa.2016.7790182

Cited by 170 publications

(140 citation statements)

References 24 publications

Supporting

Mentioning

125

Contrasting

Unclassified

Order By: Relevance

“…However, the structural periodicity distinguishes lattices from foams (having open cells) and sponges (having closed cells), whose architecture is instead stochastic. 1,2 Lattice materials lie at the boundary between composite materials and monolithic materials because at the microscale, they consist of two separate phases, namely solid struts and void parts, and hence they can be described as composites, but at the macroscale, they show a consistent set of effective properties and therefore can be treated as monolithic materials. 1 The periodic architecture can be designed to provide the lattice material with specific functions.…”

Section: Introductionmentioning

confidence: 99%

“…1,2 Lattice materials lie at the boundary between composite materials and monolithic materials because at the microscale, they consist of two separate phases, namely solid struts and void parts, and hence they can be described as composites, but at the macroscale, they show a consistent set of effective properties and therefore can be treated as monolithic materials. 1 The periodic architecture can be designed to provide the lattice material with specific functions. One of the most important benefits of lattice materials is lightweighting for structural applications, which is based on optimization of the stiffness-(or strength-) to-weight ratio.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Technological Feasibility of Lattice Materials by Laser-Based Powder Bed Fusion of A357.0

Sola

Defanti

Mantovani

et al. 2020

3D Printing and Additive Manufacturing

View full text Add to dashboard Cite

Lattice materials represent one of the utmost applications of additive manufacturing. The promising synergy between additive processes and topology optimization finds full development in achieving components that comprise bulky and hollow areas, as well as intermediate zones. Yet, the potential to design innovative shapes can be hindered by technological limits. The article tackles the manufacturability by laser-based powder bed fusion (L-PBF) of aluminum-based lattice materials by varying the beam diameter and thus the relative density. The printing accuracy is evaluated against the distinctive building phenomena in L-PBF of metals. The main finding consists in identification of a feasibility window that can be used for development of lightweight industrial components. A relative density of 20% compared with fully solid material (aluminum alloy A357.0) is found as the lowest boundary for a 3-mm cell dimension for a body-centered cubic structure with struts along the cube edges (BCCXYZ) and built with the vertical edges parallel to the growth direction to account for the worst-case scenario. Lighter structures of this kind, even if theoretically compliant with technical specifications of the machine, result in unstable frameworks.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Technological Feasibility of Lattice Materials by Laser-Based Powder Bed Fusion of A357.0

Sola

Defanti

Mantovani

et al. 2020

3D Printing and Additive Manufacturing

View full text Add to dashboard Cite

show abstract

“…Different methods for designing lattice structures have been discussed in [2]. Due to the flexibility in density control, we chose the implicit surface based method in the structure designing.…”

Section: Design Of Lattice Structure With Graded Densitymentioning

confidence: 99%

“…The superior properties AM lattice structure possesses make it a promising solution for many applications, such as lightweight structures, heat exchangers, energy absorbers, biomedical scaffold, and catalyst carrier [2][3][4]. Current studies and applications are more focused on the lattice structure with uniform density [5][6][7] than that with graded density, because its CAD model is easier to design and properties are easier to analyze.…”

Section: Introductionmentioning

confidence: 99%

Design of Lattice Structures with Graded Density Fabricated by Additive Manufacturing

Tao

Liu

Sutton

et al. 2018

EasyChair Preprints

Self Cite

View full text Add to dashboard Cite

Lattice structures fabricated by Additive Manufacturing (AM) processes are promising for many applications, such as lightweight structures and energy absorbers. However, predicting and controlling of their mechanical behaviors is challenging due to the complexity of modeling and the uncertainties exist in the manufacturing process. In this paper, we explore the possibilities enabled by controlling the local densities. A set of lattice structures with different density gradients are designed using an implicit isosurface equation, and they are manufactured by Selective Laser Melting (SLM) process with 304L stainless steel. Finite element analysis and compression test are used to evaluate their mechanical properties. The results demonstrate the strong correlations between the structural gradient and the mechanical behavior. Introducing the density gradient provides more possibilities in the design phase, which can be used to further customize the design both structurally and functionally.

show abstract

“…They are able to integrate more than one function into a physical part, which makes them attractive to a wide range of applications. While lattice structures possess complicated geometries, they can be fabricated using additive manufacturing technology using different techniques including the buildup of the material layer-by-layer directly from a computer-aided design (CAD) model, rather than the conventional subtraction manufacturing which requires complicated procedures [28]. At the macroscopic level, lattice materials can be viewed as a material with homogenized properties while the unit cell structure is of dimensions orders of magnitudes lower than those of of the macroscopic structural component.…”

Section: Cellular Solidsmentioning

confidence: 99%

Design Optimization of Dental Implants Using Additively Manufactured Lattice Materials

Mareishi¹

View full text Add to dashboard Cite

A dental implant is a biocompatible surgical component placed into the jawbone to support dental prostheses including bridges, crowns, or denture replacements. Currently, dental implants are constructed employing solid materials, coated with biocompatible layers.Since bone is a living tissue that is constantly modified in response to external loading, redistributed or reduced mechanical loading might cause bone resorption, implant loosening or interface failure, all of which have been notable problems for orthopedic implants. To overcome these issues, we propose a new design for the dental implant structure that can simultaneously minimize bone loss and interface failure. Multiscale and multi-objective design optimization of dental implants employing lattice materials was performed by considering lattice structure in implant design. A 3D FEA model of a segment of jawbone and implant was developed. Mechanical properties of the lattice material were determined and applied to the model and finally, the bone loss and interface failure were studied and the implant structure was optimized based on required objective functions. The proposed design was capable of simultaneously reducing the interface failure and bone loss, as well as implant weight. The optimized implant can be manufactured by additive manufacturing. Additive manufacturing technology facilitates the production of complicated shapes and geometries that cannot be produced by conventional manufacturing processes. In general, the proposed method can be applied to other types of implants and prostheses to optimize their structural performance and reduce their weights.iii

show abstract

Design of lattice structure for additive manufacturing

Cited by 170 publications

References 24 publications

Technological Feasibility of Lattice Materials by Laser-Based Powder Bed Fusion of A357.0

Technological Feasibility of Lattice Materials by Laser-Based Powder Bed Fusion of A357.0

Design of Lattice Structures with Graded Density Fabricated by Additive Manufacturing

Design Optimization of Dental Implants Using Additively Manufactured Lattice Materials

Contact Info

Product

Resources

About