Applications of additive manufacturing in the construction industry – A forward-looking review

Camacho, Daniel Delgado; Clayton, Patricia M.; O’Brien, William J.; Seepersad, Carolyn Conner; Juenger, Maria; Ferron, Raissa Douglas; Salamone, Salvatore

doi:10.1016/j.autcon.2017.12.031

Cited by 354 publications

(136 citation statements)

References 24 publications

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“…As the additive manufacturing (AM) technologies are maturing, more and more industries are looking into the possibilities of employing AM as part of their production ecosystems. In addition to the aerospace industry, which has been one of the earliest adopters and investors of the technology, newer avenues are being explored in the medical, transportation, consumer products, energy, tooling, art, jewelry, construction, and microelectronics industries [1][2][3][4][5][6][7][8] . With the current market value of over $7 billion, the growth of AM has been phenomenal over the last 8 years with an average annual growth of 27% 9,10 .…”

Section: Introductionmentioning

confidence: 99%

A novel microscale selective laser sintering (μ-SLS) process for the fabrication of microelectronic parts

et al. 2019

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One of the biggest challenges in microscale additive manufacturing is the production of three-dimensional, microscale metal parts with a high enough throughput to be relevant for commercial applications. This paper presents a new microscale additive manufacturing process called microscale selective laser sintering (μ-SLS) that can produce true 3D metal parts with sub-5 μm resolution and a throughput of greater than 60 mm 3 /hour. In μ-SLS, a layer of metal nanoparticle ink is first coated onto a substrate using a slot die coating system. The ink is then dried to produce a uniform nanoparticle layer. Next, the substrate is precisely positioned under an optical subsystem using a set of coarse and fine nanopositioning stages. In the optical subsystem, laser light that has been patterned using a digital micromirror array is used to heat and sinter the nanoparticles into the desired patterns. This set of steps is then repeated to build up each layer of the 3D part in the μ-SLS system. Overall, this new technology offers the potential to overcome many of the current limitations in microscale additive manufacturing of metals and become an important process in microelectronics packaging applications.

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Section: Introductionmentioning

confidence: 99%

A novel microscale selective laser sintering (μ-SLS) process for the fabrication of microelectronic parts

et al. 2019

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“…The process was called contour crafting by Khoshnevis and Dutton (1998) and Hwang and Khoshnevis (2004). Delgado Camacho et al (2018) claimed that employing novel 3DP techniques (mainly extrusion) in the construction industry could reduce the labor costs, decrease material waste, and make complex geometries, which are difficult to attain using conventional construction techniques. Moreover, Lloret et al (2015) aimed to link all the digital design, additive manufacturing, and material properties to build a complex shape from concrete structures.…”

Section: Extrusion Printing (Extrusion Based Process)mentioning

confidence: 99%

Review of Emerging Additive Manufacturing Technologies in 3D Printing of Cementitious Materials in the Construction Industry

Shakor

Nejadi

Paul

et al. 2019

Front. Built Environ.

107

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Additive manufacturing is a fabrication technology that is rapidly revolutionizing the manufacturing and construction sectors. In this paper, a review of various prototyping technologies for printing cementitious materials and selected 3D printing techniques are presented in detail. Benchmark examples are provided to compare three well-known printing techniques; inkjet printing (binder jetting), selected laser sintering (SLS), and extrusion printing (extrusion based process). A comprehensive search in the literature was conducted to identify various mix designs that could be employed when printing cementitious materials. Aspects of concrete mix design are described, and some new experiments are conducted to analyse the printability of new mixes by the authors. Future research in the area of the rheology of cementitious materials and its relationship with the structural performance of finished concretes are highlighted.

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“…Since 3‐D metal printers are becoming cheaper and faster, which allow for the construction of larger part sizes, the steel construction industry has recently started to explore its possibilities, yet is still at the early‐research and demonstration stages . Researchers have so far focused on the discovery of process parameters resulting in high‐quality parts, simultaneously increasing the production rate and reducing manufacturing costs, understanding the microstructural features of printed metals and their mechanical behavior under static, dynamic and fatigue loading, and developing specific numerical techniques to optimize part geometries .…”

Section: Integration Of 3‐d Metal Printing To the Steel Tubular Jointmentioning

confidence: 99%

Robustness‐oriented topology optimization for steel tubular joints mimicking bamboo structures

Kanyilmaz

Berto

2019

Mat Design Process Comm

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Steel tubular profiles have outstanding mechanical and architectural performances, but their joints must be manufactured with a vast number of welds and local stiffeners, resulting in complex fabrication and low structural reliability under extreme loads. Fatigue failure is usually a dominant parameter in their design. On the other hand, nature perfectly optimizes its structures with minimized stress concentrations resulting in an extensive fatigue life. In the case of tubular structures, the nodes between the bamboo body and branches are inspiring examples. This article discusses how smarter solutions can be achieved using inspiration from nature by setting the objective of topology optimization to enhance the structural integrity of welded tubular joints between 3‐D‐printed and conventional steel components. Rather than focusing on the “weight reduction,” it prioritizes the objectives of resistance, robustness, and durability. 3‐D metal printing technology, unleashed from the constraints of traditional manufacturing, can enable this structural customization, bringing substantial savings to tubular joint fabrication costs and material waste. To quantify the performance of such joints, the strain energy density method can be the right tool, thanks to its independence on mesh size. This paper provides a review of these subjects and presents brief results of a case study.

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Applications of additive manufacturing in the construction industry – A forward-looking review

Cited by 354 publications

References 24 publications

A novel microscale selective laser sintering (μ-SLS) process for the fabrication of microelectronic parts

A novel microscale selective laser sintering (μ-SLS) process for the fabrication of microelectronic parts

Review of Emerging Additive Manufacturing Technologies in 3D Printing of Cementitious Materials in the Construction Industry

Robustness‐oriented topology optimization for steel tubular joints mimicking bamboo structures

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