Surface functionalization – a new functional dimension added to 3D printing

2020 ◽  
Vol 8 (36) ◽  
pp. 12380-12411
Author(s):  
Pan Jiang ◽  
Zhongying Ji ◽  
Xiaolong Wang ◽  
Feng Zhou
Keyword(s):  
3D Printing ◽  
Surface Functionalization ◽  
Rapid Development ◽  
Functional Dimension

Various requirements for 3D printing raised by actual applications in different fields have provoked the rapid development of technologies together with various specific materials.

scholarly journals Foundation Piles—A New Feature for Concrete 3D Printers

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2545
Author(s):  
Marcin Hoffmann ◽  
Krzysztof Żarkiewicz ◽  
Adam Zieliński ◽  
Szymon Skibicki ◽  
Łukasz Marchewka
Keyword(s):  
3D Printing ◽  
Rapid Development ◽  
Construction Materials ◽  
Shallow Foundation ◽  
Soil Reinforcement ◽  
3D Printer ◽  
Permanent Formwork ◽  
3D Printers ◽  
New Feature ◽  
The Cost

Foundation piles that are made by concrete 3D printers constitute a new alternative way of founding buildings constructed using incremental technology. We are currently observing very rapid development of incremental technology for the construction industry. The systems that are used for 3D printing with the application of construction materials make it possible to form permanent formwork for strip foundations, construct load-bearing walls and partition walls, and prefabricate elements, such as stairs, lintels, and ceilings. 3D printing systems do not offer soil reinforcement by making piles. The paper presents the possibility of making concrete foundation piles in laboratory conditions using a concrete 3D printer. The paper shows the tools and procedure for pile pumping. An experiment for measuring pile bearing capacity is described and an example of a pile deployment model under a foundation is described. The results of the tests and analytical calculations have shown that the displacement piles demonstrate less settlement when compared to the analysed shallow foundation. The authors indicate that it is possible to replace the shallow foundation with a series of piles combined with a printed wall without locally widening it. This type of foundation can be used for the foundation of low-rise buildings, such as detached houses. Estimated calculations have shown that the possibility of making foundation piles by a 3D printer will reduce the cost of making foundations by shortening the time of execution of works and reducing the consumption of construction materials.

scholarly journals Use of Reverse Engineering and Additive Printing in the Reconstruction of Gears

2020 ◽  
Vol 3 (1) ◽  
pp. 274-284
Author(s):  
Dorota Palka
Keyword(s):  
3D Printing ◽  
Reverse Engineering ◽  
Fused Deposition Modeling ◽  
Rapid Development ◽  
Spare Parts ◽  
Common Element ◽  
Practical Application ◽  
Computer Aided Manufacturing ◽  
Fused Deposition ◽  
Computer Aided

AbstractDespite the very rapid technological development, the general concept of mechanical devices has not changed. Still, the most common element of these devices are gears, whose range of use is very wide. There are both technological and historical considerations for the reconstruction of gears and other elements. In particular, this applies to spare parts for technical facilities that are not available on the market or service costs are too high. Contemporary reconstruction is called Reverse Engineering, which offers tools that allow transformation of an existing object through a virtual model into the final real product. Modern production engineering is based on innovative CAD – Computer Aided Designed design methods and computer-aided manufacturing technologies, CAM – Computer Aided Manufacturing. The rapid development of 3D CAD systems has led to the development of solutions to obtain the designed object, already at the development stage. Such a solution is the Rapid Prototyping method, designed for fast, precise and repeatable production of machine components. Widespread use and growing interest in the use of additive printing influenced the development of this technology. The purpose of the article is to present the practical application of the Reverse Engineering method and 3D printing in the reconstruction of gears. The object of research is the real gear, which has been reconstructed using Reverse Engineering and 3D printing. The article presents the basic assumptions of the methods used and the methodology for conducting reconstruction work. FDM (Fused Deposition Modeling) technology was used for the research. The results obtained are a real example of the practical application of the presented methods. At the same time, they create great opportunities for their wider use.

3D Printing in Dentistry—State of the Art

2020 ◽  
Vol 45 (1) ◽  
pp. 30-40 ◽  
Author(s):  
A Kessler ◽  
R Hickel ◽  
M Reymus
Keyword(s):  
3D Printing ◽  
Clinical Application ◽  
Industrial Revolution ◽  
Rapid Development ◽  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Fused Filament Fabrication ◽  
Digital Light Processing ◽  
Materials Used ◽  
Binder Jetting

SUMMARY Three-dimensional (3D) printing is a rapidly developing technology that has gained widespread acceptance in dentistry. Compared to conventional (lost-wax technique) and subtractive computer numeric controlled methods, 3D printing offers process engineering advantages. Materials such as plastics, metals, and ceramics can be manufactured using various techniques. 3D printing was introduced over three decades ago. Today, it is experiencing rapid development due to the expiration of many patents and is often described as the key technology of the next industrial revolution. The transition to its clinical application in dentistry is highly dependent on the available materials, which must not only provide the required accuracy but also the necessary biological and physical properties. The aim of this work is to provide an up-to-date overview of the different printing techniques: stereolithography, digital light processing, photopolymer jetting, material jetting, binder jetting, selective laser sintering, selective laser melting, and fused filament fabrication. Additionally, particular attention is paid to the materials used in dentistry and their clinical application.

scholarly journals EQUAL PROPORTION REPRODUCTION METHOD OF GROTTO BASED ON POINT CLOUD

2019 ◽  
Vol XLII-2/W15 ◽  
pp. 1215-1219
Author(s):  
P. Wei ◽  
A. Li ◽  
M. Hou ◽  
L. Zhu ◽  
D. Xu ◽  
...  
Keyword(s):  
3D Printing ◽  
Point Cloud ◽  
Laser Scanning ◽  
New Technologies ◽  
Rapid Development ◽  
Point Clouds ◽  
Equal Proportion ◽  
3D Laser Scanning ◽  
Printing Technology ◽  
3D Printing Technology

<p><strong>Abstract.</strong> The rapid development of 3D laser scanning and 3D printing technology provides new technologies and ideas for cultural relic protection and reproduction. Aiming at the requirement of equal proportional reproduction of large-scale grottoes, this paper takes the point cloud data of the 18th Cave of Yungang Grottoes obtained by 3D laser scanning as an example, and proposes a data processing and reproduction block partitioning method for equal proportion reproduction. The Cyclone, Geomagic and AutoCAD software were used to construct the 3D model of the grotto, and the 3D printing technology was used to realize the secondary design and model print. Among them, the research focuses on the modeling of massive point clouds and the method of model partitioning based on voxels. It can meet the requirements of movable and assembly while realizing the equal proportional reproduction of the whole grotto. The research results and application can be a good reference for the future grotto reproduction work.</p>

scholarly journals Main Problems Using DEM Modeling to Evaluate the Loose Soil Collection by Conceptual Machine as a Background for Future Extraterrestrial Regolith Harvesting DEM Models

Micromachines ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1404
Author(s):  
Przemysław Młynarczyk ◽  
Damian Brewczyński
Keyword(s):  
3D Printing ◽  
Product Development ◽  
Rapid Development ◽  
Subsequent Development ◽  
Integrated Approach ◽  
Mining Machine ◽  
Dem Simulation ◽  
Loose Soil ◽  
Rapid Product Development ◽  
Key Factor

Nowadays, rapid product development is a key factor influencing a company’s success. In the Space 4.0. era, an integrated approach with the use of 3D printing and DEM modeling can be particularly effective in the development of technologies related to space mining. Unfortunately, both 3D printing and DEM modeling are not without flaws. This article shows the possibilities and problems resulting from the use of DEM simulation and 3D printing simultaneously in the rapid development of a hypothetical mining machine. For the subsequent development of the regolith harvesting model, loose soil harvesting simulations were performed and the underlying problems were defined and discussed. The results show that it is possible to use both technologies simultaneously to be able to effectively and accurately model the behavior of this type of machine in various gravitational conditions in the future.

scholarly journals Complex Discrete System Analysis of Process Design and Tourist Souvenir Making Based on Artificial Intelligence 3D Printing

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Yuchuan Guo
Keyword(s):  
Artificial Intelligence ◽  
3D Printing ◽  
System Analysis ◽  
Focal Length ◽  
Rapid Development ◽  
Three Dimensional ◽  
Three Dimensional Model ◽  
Printing Technology ◽  
Intelligence Algorithm ◽  
Artificial Intelligence Algorithm

With the rapid development of 3D (three-dimensional) printing technology, it has been widely used in the field of ceramic arts and crafts. However, due to the complexity of 3D printing technology, it will face complex modeling and calculation when designing ceramic art crafts. To this end, the artificial intelligence algorithm is introduced, and using the data measured by the built-in modeling instruction of LAMMPS of the artificial intelligence algorithm, the program is used to reset its coordinates, length, width, height, and focal length. The obtained data are modified by postprocessing to correct its coordinates and the size of the simulation frame, so that the nanopowder model is placed in the center, forming a solid ellipsoidal aluminum nanopowder and cutting it into a three-dimensional model of teapot, which is transformed into the STL file of two-dimensional cross section, and the finished product is printed out to the 3D printer. Finally, the RTM model is used to test the quality of tourist souvenirs. The results show that the homogeneity of variance is much greater than 0.10. It can be inferred that the tourist souvenirs of pottery teapots have met the requirements of national technological quality standards.

scholarly journals 3D Concrete Printing for Sustainable Construction

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6351
Author(s):  
Maria Kaszyńska ◽  
Szymon Skibicki ◽  
Marcin Hoffmann
Keyword(s):  
3D Printing ◽  
Environmental Impact ◽  
Negative Impact ◽  
Rapid Development ◽  
Cementitious Materials ◽  
Sustainable Construction ◽  
Standard Samples ◽  
Negative Environmental Impact ◽  
Extrusion Printing ◽  
Mineral Additives

Despite the rapid development of 3D printing technology for cement composites, there are still a number of unsolved issues related to extrusion printing. One of them is proper mix design that allows for meeting criteria related to the printing of cementitious materials, such as pumpability, buildability, consistency on the materials, flowability and workability, simultaneously incorporating sustainable development ideas. In the case of mixes for 3D printing, the modification of the composition which increases the overall performance does not always go hand in hand with the reduction of negative environmental impact. The article presents the results of tests of eight mixtures modified with reactive and inert mineral additives designed for 3D printing. The mixes were evaluated in terms of their rheological and mechanical properties as well as environmental impact. Initial test results were verified by printing hollow columns up until collapse. Later, the differences between the compressive strength of standard samples and printed columns were determined. In order to summarize the results, a multi-faceted analysis of the properties of the mixes was carried out, introducing assessment indicators for its individual parameters. The article proves that appropriate material modification of mixes for 3D printing can significantly reduce the negative impact on the environment without hindering required 3D printing properties.

Rapid prototyping, customizable multifunctional structure: 3D printing technology promotes the rapid development of TENG

2021 ◽  
Author(s):  
Nixin Cai ◽  
Ping Sun ◽  
Saihua Jiang
Keyword(s):  
3D Printing ◽  
Power Systems ◽  
Rapid Prototyping ◽  
Energy Conversion ◽  
Power Supply ◽  
Rapid Development ◽  
Portable Device ◽  
Printing Technology ◽  
3D Printing Technology ◽  
Conversion Technology

The development of IoTs and portable device have excited the relentless pursuit of self-power systems to solve the limitations of conventional power supply methods. As a novel energy conversion technology,...

scholarly journals “Bronzi Di Riace” Geomatics Techniques in Augmented Reality for Cultural Heritage Dissemination

2020 ◽  
Vol 9 (3) ◽  
pp. 1001-1010
Keyword(s):  
Augmented Reality ◽  
3D Printing ◽  
Cultural Heritage ◽  
3D Model ◽  
Imaging Techniques ◽  
Rapid Development ◽  
Modeling Tools ◽  
Archaeological Heritage ◽  
Additional Information ◽  
South Italy

In the ‘Museo Archeologico Nazionale della Magna Grecia' in Reggio Calabria (south Italy) are located two full-size bronzes cast around the 5th century BC: The Riace Bronzes; thanks to their outstanding manufacture, they truly represent significant sculptural masterpieces of Greek art in the world. This paper describes the methodology used by the Geomatics Laboratory of the DICEAM of the Mediterranean University of Reggio Calabria to achieve a 3D model of the two sculptures. The 3D modelling is based on the use of imaging techniques, such as digital photogrammetry and computer vision. The achieved results demonstrate the effectiveness of the technique used in the cultural heritage field for the creation of a digital production and replication through 3d printing. Moreover considering that in the renewed interest in the context of international museological studies, Augmented Reality innovation represents a new method for amplifying visitor numbers into museums despite concerns over returns on investment, the procedure to develop a touristic app is described. In fact the enhancement of cultural heritage through the use of 3D acquisition and modeling tools represents one of the fields of study that will see rapid development in the near future. Thus, in order to further valorize and disseminate archaeological heritage, we are developing an app for tourism purposes. The created app allows the user, in real time, to obtain additional information on the object of investigation, even allowing them to view the 3D model in AR. Moreover, the app combines AR and VR technologies with the opportunities offered by 3D printing,

scholarly journals Various methods of 3D and Bio-printing

2017 ◽  
Vol 64 (3) ◽  
pp. 136-145 ◽  
Author(s):  
Vukoman Jokanović ◽  
Božana Čolović ◽  
Đorđe Antonijević ◽  
Milutin Mićić ◽  
Slavoljub Živković
Keyword(s):  
3D Printing ◽  
Rapid Development ◽  
Complex Structure ◽  
Significant Loss ◽  
Data Sets ◽  
Training Models ◽  
Tissue Replacement ◽  
Biomimetic Scaffolds ◽  
Internal Structures ◽  
Complex Surgical Procedures

Summary There is growing need for synthetic tissue replacement materials designed in a way that mimic complex structure of tissues and organs. Among various methods for fabrication of implants (scaffolds), 3D printing is very powerful technique because it enables creation of scaffolds with complex internal structures and high resolution, based on medical data sets. This method allows fabrication of scaffolds with desired macro- and micro-porosity and fully interconnected pore network. Rapid development of 3D printing technologies has enabled various applications from the creation of anatomical training models for complex surgical procedures to the printing of tissue engineering constructs. The aim of current investigations was to develop compatible printers and materials (bioinks) to obtain biomimetic scaffolds, which allow printing of living cells without significant loss of cell viability. The advanced level of such printing assumes “in situ” printing, i.e. printing cells and biomaterials directly onto or in a patient that will reduce recovery time.

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