scholarly journals Building Envelope Prefabricated with 3D Printing Technology

2021 ◽  
Vol 13 (16) ◽  
pp. 8923
Author(s):  
Stelladriana Volpe ◽  
Valentino Sangiorgio ◽  
Andrea Petrella ◽  
Armando Coppola ◽  
Michele Notarnicola ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Industrial Revolution ◽  
Potassium Phosphate ◽  
Digital Fabrication ◽  
Building Envelope ◽  
Manufacturing Technology ◽  
Construction Automation ◽  
Additive Manufacturing Technology ◽  
Precast Elements

The Fourth Industrial Revolution represents the beginning of a profound change for the building sector. In the last decade, the perspective of shapes, materials, and construction techniques is evolving fast due to the additive manufacturing technology. On the other hand, even if the technology is growing fast and several 3D printed buildings are being developed worldwide, the potential of concrete 3D printing in building prefabrication remains unexplored. Consequently, the application of new digital fabrication technologies in the construction industry requires a redesign of the construction process and its components. This paper proposes a novel conception, design, and prototyping of a precast building envelope to be prefabricated with extrusion-based 3D concrete printing (3DCP). The new design and conception aim to fully exploit the potential of 3D printing for prefabricated components, especially in terms of dry assembly, speed of implementation, reusability, recyclability, modularity, versatility, adaptability, and sustainability. Beyond the novel conceptual design of precast elements, the research investigated the 3D printable cementitious material based on a magnesium potassium phosphate cement (MKPC), which was devised and tested to ensure good performances of the proposed component. Finally, a prototype has been realised in scale with additive manufacturing technology in order to verify the printability and to optimize the extruder path. This study leads us to believe that the combined use of prefabricated systems, construction automation, and innovative materials can decisively improve the construction industry’s sustainability in the future.

Manufacture of Lenses and Diffraction Gratings Using DLP As an Additive Manufacturing Technology

2018 ◽  
Author(s):  
Laura Daniela Vallejo Melgarejo ◽  
Jose García ◽  
Ronald G. Reifenberger ◽  
Brittany Newell
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Diffraction Grating ◽  
Diffraction Gratings ◽  
Optical Microscope ◽  
Manufacturing Technology ◽  
Manufacturing Processes ◽  
Digital Light Processing ◽  
Additive Manufacturing Technology ◽  
Potential Use

This document condenses the results obtained when 3D printing lenses and their potential use as diffraction gratings using Digital Light Processing (DLP), as an additive manufacturing technique. This project investigated the feasibility of using DLP additive manufacturing for producing custom designed lenses and gratings. DLP was identified as the preferred manufacturing technology for gratings fabrication. Diffraction gratings take advantage of the anisotropy, inherent in additive manufacturing processes, to produce a collated pattern of multiple fringes on a substrate with completely smooth surfaces. The gratings are transmissive and were manufactured with slit separations of 10, 25 and 50 μm. More than 50 samples were printed at various build angles and mechanically treated for maximum optical transparency. The variables of the irradiance equation were obtained from photographs taken with an optical microscope. These values were used to estimate theoretical irradiance patterns of a diffraction grating and compared against the experimental 3-D printed grating. The resulting patterns were found to be remarkably similar in amplitude and distance between peaks when compared to theoretical values.

scholarly journals Additive Manufacturing in Vascular Stent Fabrication

2019 ◽  
Vol 253 ◽  
pp. 03003
Author(s):  
Lei Yang ◽  
Xin Chen ◽  
Lei Zhang ◽  
Lei Li ◽  
Shuangzhu Kang ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Personalized Medicine ◽  
High Efficiency ◽  
Structural Characteristics ◽  
Manufacturing Technology ◽  
Vascular Stent ◽  
Additive Manufacturing Technology ◽  
Vascular Scaffolds ◽  
And Personalized Medicine

High-efficiency formation of personalized stent by additive manufacturing (3D printing) has gained deal of attention and research in interventional and personalized medicine. In this article, the structural characteristics of vascular scaffolds and the application and innovation of additive manufacturing technology in the process of angioplasty are reviewed. In the future, with the continuous maturity of additive manufacturing technology, it is expected to be an important part of interventional precision medicine to manufacture personalized vascular stent.

The Trends and Challenges of 3D Printing

2019 ◽  
pp. 415-423
Author(s):  
Edna Ho Chu Fang ◽  
Sameer Kumar
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Rapid Prototyping ◽  
Industrial Design ◽  
Consumer Products ◽  
Manufacturing Technology ◽  
3D Object ◽  
Additive Manufacturing Technology ◽  
Human Organs ◽  
Traditional Manufacturing

3D printing is a type of additive manufacturing technology where a 3D object is created by laying down subsequent layers of material at the mm scale. It is also known as rapid prototyping. 3D printing is now applied in various industries such as footwear, jewelry, architecture, engineering and construction, aerospace, dental and medical industries, education, consumer products, automotive, and industrial design. Some claim that 3D printing will put an end to traditional manufacturing, primarily since 3D printing imposes a tool-less process. Though 3D printing technology is used in weapon manufacturing, it is also being used to improve the lives of mankind. In the future, 3D printing will most probably be used to print human organs. The chapter discusses the trends and challenges faced by this exciting technology.

Foam additive manufacturing technology: main characteristics and experiments for hull mold manufacturing

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Elodie Paquet ◽  
Alain Bernard ◽  
Benoit Furet ◽  
Sébastien Garnier ◽  
Sébastien Le Loch
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Manufacturing Process ◽  
Manufacturing Industry ◽  
Pressure Head ◽  
Manufacturing Technology ◽  
Cnc Machining ◽  
Numerical Control ◽  
Content Type ◽  
Additive Manufacturing Technology

Purpose The purpose of this paper is to present a novel methodology to produce a large boat hull with a foam additive manufacturing (FAM) process. To respond to shipping market needs, this new process is being developed. FAM technology is a conventional three-dimensional (3D) printing process whereby layers are deposited onto a high-pressure head mounted on a six-axis robotic arm. Traditionally, molds and masters are made with computer numerical control (CNC) machining or finished by hand. Handcrafting the molds is obviously time-consuming and labor-intensive, but even CNC machining can be challenging for parts with complex geometries and tight deadlines. Design/methodology/approach The proposed FAM technology focuses on the masters and molds, that are directly produced by 3D printing. This paper describes an additive manufacturing technology through which the operator can create a large part and its tools using the capacities of this new FAM technology. Findings The study shows a comparison carried out between the traditional manufacturing process and the additive manufacturing process, which is illustrated through an industrial case of application in the manufacturing industry. This work details the application of FAM technology to fabricate a 2.5 m boat hull mold and the results show the time and cost savings of FAM in the fabrication of large molds. Originality/value Finally, the advantages and drawbacks of the FAM technology are then discussed and novel features such as monitoring system and control to improve the accuracy of partly printed are highlighted.

The Trends and Challenges of 3D Printing

2018 ◽  
pp. 4382-4389
Author(s):  
Edna Ho Chu Fang ◽  
Sameer Kumar
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Rapid Prototyping ◽  
Industrial Design ◽  
Consumer Products ◽  
Manufacturing Technology ◽  
3D Object ◽  
Additive Manufacturing Technology ◽  
Human Organs ◽  
Traditional Manufacturing

3D printing is a type of additive manufacturing technology where a 3D object is created by laying down subsequent layers of material at the mm scale. It is also known as rapid prototyping. 3D printing is now applied in various industries such as footwear, jewelry, architecture, engineering and construction, aerospace, dental and medical industries, education, consumer products, automotive and industrial design. Some claim that 3D printing will put an end to traditional manufacturing primarily since 3D printing imposes a tool-less process. Though 3D printing technology is used in weapon manufacturing, it is also being used to improve the lives of mankind. In the future, 3D printing will most probably be used to print human organs. The article discusses the trends and challenges faced by this exciting technology.

Research  status and  Application Analysis  of 3D Printing Technology

2014 ◽  
Vol 529 ◽  
pp. 697-700
Author(s):  
Wan Li Ma ◽  
Feng He Tao ◽  
Chang Zhi Jia ◽  
Jian Chun Yang
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Manufacturing Technology ◽  
Printing Technology ◽  
Research Status ◽  
3D Printing Technology ◽  
Additive Manufacturing Technology ◽  
Application Analysis

3D printing technology is one additive manufacturing technology based on the principle of material accumulation. The domestic and foreign research status is specially introduced. The main principles and features of 3D printing technology are summarized. The applications in the civilian aspect is analyzed

scholarly journals Tribological properties of 3D printed components

2018 ◽  
Vol 48 (1) ◽  
pp. 447-463 ◽  
Author(s):  
Bolesław Giemza ◽  
Marek Domański ◽  
Maciej Deliś ◽  
Dawid Kapica
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Tribological Properties ◽  
Dry Friction ◽  
Manufacturing Technology ◽  
Friction Couple ◽  
Ring Type ◽  
Additive Manufacturing Technology ◽  
Material Type ◽  
3D Printed

Abstract Additive manufacturing technology is developing in many industries, including aviation, automotive and others. 3D printing offers new possibilities in the field of designing and manufacturing of machines and devices’ components. The paper presents the results of tribological investigations of components produced in FDM printing technology. The authors presented the evaluation of sliding properties of the model friction couple – block on ring type – of available thermoplastic polymers and polymers’ composites under dry friction conditions. The authors assessed the influence of material type and printed structure on resistance to motion of prepared samples.

scholarly journals IMPLEMENTATION OF OPTIMUM ADDITIVE TECHNOLOGIES DESIGN FOR UNMANNED AERIAL VEHICLE TAKE-OFF WEIGHT INCREASE

2020 ◽  
pp. 50-60
Author(s):  
Sven Maricic ◽  
Iva Mrsa Haber ◽  
Ivan Veljovic ◽  
Ivana Palunko
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Weight Ratio ◽  
Goal Function ◽  
Manufacturing Technology ◽  
Generative Design ◽  
Additive Manufacturing Technology ◽  
3D Printed ◽  
Lift Off ◽  
The Right

The aim of this paper is to investigate the possibility of drone optimization by selecting and testing the best material suitable for additive manufacturing technology and generative design approach, i. e. shape optimization. The use of additive manufacturing technology enables the creation of models of more complex shapes that are difficult or impossible to produce with conventional processing methods. The complex and unconventional design of the drone body can open up many possibilities for weight reduction while maintaining the strength of the drone body. By using 3D printing in addition to FEM (Finite Element Method) analysis, and generative design it can identify areas of the drone body that are overdrawn, allowing it to either lift off material or simply change the design at these areas. Choosing the right material for this application is crucial in order to optimise the mechanical properties of the material with weight, material cost, printability and availability of the material and the 3D printing method, while at the same time reducing environmental pollution. The goal is to reduce the drone mass by 15–20 % using generative design tools. Mass is an important segment when prototyping a drone. If the drone is too heavy, more lift power is needed to keep the drone in the air, so the propellers have to turn faster and use more energy. Consequently, the reduction of drone mass should increase the take-off weight. In this article 5 commercial drones of similar characteristics are compared with the final proposal of our 3D printed drone (Prototype 1). The rotor distance between the drones, the weight of the electric motor and the take-off weight are compared. The goal was to produce a prototype with a big rotor distance-to-weight ratio, and take-off weight bigger than observed drones have. The defined goal function was optimized in order to evaluate characteristics of 12 different 3D printed materials. Following properties: ultimate strength, stiffness, durability, printability of the material, and required bed and extruder temperature for printing were taken in consideration to select optimal material. Polycarbonate proved to be the best choice for 3D printing UAVs

scholarly journals Friction additive manufacturing technology: A state-of-the-art survey

2021 ◽  
Vol 13 (7) ◽  
pp. 168781402110344
Author(s):  
Huangyu Gao ◽  
Hongjun Li
Keyword(s):  
Additive Manufacturing ◽  
Industrial Revolution ◽  
Mechanical Performance ◽  
State Of The Art ◽  
Manufacturing Technology ◽  
Powder Bed ◽  
Friction Stir ◽  
Existing Problems ◽  
Additive Manufacturing Technology ◽  
Fourth Industrial Revolution

Additive manufacturing as a major component of the “fourth Industrial Revolution” is getting more and more attention. Friction additive manufacturing technology (FAM) is a subdivision of additive manufacturing technology. Because of its solid-state characteristics, deposition by FAM shows better mechanical performance than other technologies such as powder bed fusion technologies. This paper presents a state-of-the-art survey on the development of FAM in three categories: (i) Friction stir additive manufacturing; (ii) Friction surfacing additive manufacturing; (iii) Metal powder assisted additive manufacturing. The underlying principles, process parameters, microstructure, mechanical properties, and existing problems are described and discussed in detail.

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