Implications of lattice structures on economics and productivity of metal powder bed fusion

Flores, Iñigo; Kretzschmar, Niklas; Azman, Abdul Hadi; Chekurov, Sergei; Pedersen, David Bue; Chaudhuri, Atanu

doi:10.1016/j.addma.2019.100947

Cited by 40 publications

(24 citation statements)

References 27 publications

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“…Leary et al 19 stated the limitations of SLM that include powder size, material type, and process parameters. In 2020, Flores et al 3 proposed design guidelines for metal powder bed fusion (PBF) systems to minimize the requirement of support structures and reduce time and manufacturing cost. In the same year, Zhang et al 130 discussed unfavorable issues such as internal defects and oxidation when using an EBM machine.…”

Section: Manufacturability Of Lattice Structures For Ammentioning

confidence: 99%

“…In addition, the amount of energy used by AM is far less than conventional machining in terms of tooling and workers. 3 Lattice structure is a porous structure formed by arranging unit cells where its patterns influence the mechanical performance of the structure. Lattice structures offer great opportunities when providing highstrength and lightweight structures compared to nonlattice or solid structures, for example, in the automotive 4 and aerospace industries.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the amount of energy used by AM is far less than conventional machining in terms of tooling and workers. 3…”

Section: Introductionmentioning

confidence: 99%

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A review on integration of lightweight gradient lattice structures in additive manufacturing parts

Seharing

Azman

Abdullah

2020

Advances in Mechanical Engineering

Self Cite

149

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This review analyses the design, mechanical behaviors, manufacturability, and application of gradient lattice structures manufactured via metallic additive manufacturing technology. By varying the design parameters such as cell size, strut length, and strut diameter of the unit cells in lattice structures, a gradient property is obtained to achieve different levels of functionalities and optimize strength-to-weight ratio characteristics. Gradient lattice structures offer variable densification and porosities; and can combine more than one type of unit cells with different topologies which results in different performances in mechanical behavior layer-by-layer compared to non-gradient lattice structures. Additive manufacturing techniques are capable of manufacturing complex lightweight parts such as uniform and gradient lattice structures and hence offer design freedom for engineers. Despite these advantages, additive manufacturing has its own unique drawbacks in manufacturing lattice structures. The rules and strategies in overcoming the constraints are discussed and recommendations for future work were proposed.

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Section: Manufacturability Of Lattice Structures For Ammentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A review on integration of lightweight gradient lattice structures in additive manufacturing parts

Seharing

Azman

Abdullah

2020

Advances in Mechanical Engineering

Self Cite

149

View full text Add to dashboard Cite

show abstract

“…The biggest advantage of AM over conventional manufacturing is the ability to create complex geometries, enabling designers to think of completely new shapes (Wang et al, 2016) and internal structures (Flores, 2019). This is precisely why the idea of Design Freedom is directly related to AM.…”

Section: Additive Manufacturingmentioning

confidence: 99%

A methodology for the decentralised design and production of additive manufactured spare parts

Montero

Weber

Bleckmann³

et al. 2020

Production & Manufacturing Research

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The production of spare parts using Additive Manufacturing (AM) is an emerging area that impacts the supply chain management. To give designers a way to proceed at the moment of redesign and produce a spare part using AM, this contribution presents a methodology for the design and manufacturing of digital spare parts using AM in decentralized facilities. The redesign of the spare parts is tackled by giving design considerations based on agile hardware development practices to improve the quality of the spare parts and reduce the lead time. Since this methodology is derived from different case studies of the military over two years, the approach is suited for the defence industry but can be adapted to other industries that operate reduced facilities abroad. Additionally, three different use cases following the methodology are presented. The weaknesses of the processes are highlighted and some recommendations for production engineers and designers are given.

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“…In the research of laser processing and molding optimization, many scholars adopted different experimental methods. Flores et al [26] used the topology optimization method to optimize the parameters of the lattice structure of the parts, which reduced the manufacturing cost by 53.7% and the production time by 54.3% and increased the output. Arısoy et al [27] used the surface response regression method to study the influence of the cooling rate and thermal gradient during laser processing of nickel alloy (IN625) material, which improved production efficiency.…”

Section: Introductionmentioning

confidence: 99%

Study on the forming and sensing properties of laser-sintered TPU/CNT composites for plantar pressure sensors

Zhuang

Guo

et al. 2021

Int J Adv Manuf Technol

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Conductive polymer composites (CPCs) combining with specific microstructures (micropores, microcracks, etc.) can exhibit unique resistance response changes, which can be widely regarded as an effective way to improve sensing performance. This study takes advantage of the characteristics of the formation of tiny pores between crystal grains during selective laser sintering (SLS) processing to introduce a microporous structure into the thermoplastic polyurethane (TPU)/carbon nanotube (CNT) sensing element to prepare a three-dimensional porous conductive structure. The effect of the SLS process on sensing sensitivity, accuracy, and density was studied, and its sensing and forming mechanism were discussed. By adjusting SLS process parameters to control the performance of porous structure sensor elements, a final TPU/CNT sensor element with a wide pressure detection range, high sensitivity, a fast response time, and good stability and durability was developed. Finally, the optimal performance of the developed flexible pressure sensor was successfully used to detect the pressure distribution of the human foot. This study provided a simple and effective research method to develop high-performance flexible pressure sensors.

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Implications of lattice structures on economics and productivity of metal powder bed fusion

Cited by 40 publications

References 27 publications

A review on integration of lightweight gradient lattice structures in additive manufacturing parts

A review on integration of lightweight gradient lattice structures in additive manufacturing parts

A methodology for the decentralised design and production of additive manufactured spare parts

Study on the forming and sensing properties of laser-sintered TPU/CNT composites for plantar pressure sensors

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