scholarly journals Study of the possibilities of 3D printing in ship modeling using the example of manufacturing a model of a small vessel for hydrodynamic testing in an experimental pool

2020 ◽  
Author(s):  
Alexander Vladimirovich Dektyarev ◽  
Pavel Gennadievich Zobov ◽  
Pavel Romanovich Grishin ◽  
Vladimir Nikolaevich Morozov
Keyword(s):  
3D Printing ◽  
3D Model ◽  
Three Dimensional ◽  
3D Scanning ◽  
Technological Parameters ◽  
Geometric Shapes ◽  
Adhesive Compound ◽  
3D Printers ◽  
Test Pool ◽  
Hydrodynamic Testing

Abstract The relevance of the work is determined by a fundamentally new direction of 3D printing in the manufacture of ship models for hydrodynamic testing. In this paper, we study the towing drag of a model of a small boat manufactured using additive three-dimensional printing technologies. Based on the dimensions of the 3D printers used and the technological parameters of working with them, as well as the design features of the test pool, small-sized vessels of a series of kayaks, kayaks and canoes, which are of sufficient length, but not too wide and high, were investigated as a prototype of the future model, which is ideal under the methods of additive manufacturing. A base of prototypes of vessels of this class has been compiled and a rationale has been given for the choice of the prototype vessel itself for research, including an analysis of the design of the vessels presented, the availability of design and technological documentation, as well as technological schemes for manufacturing the model. A 3D model of the vessel was developed, its optimization for 3D printing and analysis of geometric shapes for deviations from ITTC requirements. The study of deviations of the geometric shapes of the ship model from shrinkage deformations was carried out using 3D scanning with the development of a technological scheme for describing this process. When developing a 3D model, in the process of 3D printing, as well as processing the results of 3D scanning, modern software tools — FreeShip, Autodesk Inventor, Cloud Compare, and others — were used in the work. In the manufacture of the model, the new DPA adhesive compound formula was used, able to provide durable joints for PLA plastic products. It was found that the measurements prove the possibility of using 3D printing for the production of ship models for hydrodynamic testing, subject to all the nuances of the technology.

Algorithm to Reduce Leading and Lagging in Conformal Direct-Print

2018 ◽  
Vol 140 (10) ◽  
Author(s):  
Morteza Vatani ◽  
Faez Alkadi ◽  
Jae-Won Choi
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
3D Model ◽  
Three Dimensional ◽  
Motion Direction ◽  
B Spline ◽  
And Topology ◽  
Printing System ◽  
3D Printed ◽  
Printed Patterns

A novel additive manufacturing algorithm was developed to increase the consistency of three-dimensional (3D) printed curvilinear or conformal patterns on freeform surfaces. The algorithm dynamically and locally compensates the nozzle location with respect to the pattern geometry, motion direction, and topology of the substrate to minimize lagging or leading during conformal printing. The printing algorithm was implemented in an existing 3D printing system that consists of an extrusion-based dispensing module and an XYZ-stage. A dispensing head is fixed on a Z-axis and moves vertically, while the substrate is installed on an XY-stage and moves in the x–y plane. The printing algorithm approximates the printed pattern using nonuniform rational B-spline (NURBS) curves translated directly from a 3D model. Results showed that the proposed printing algorithm increases the consistency in the width of the printed patterns. It is envisioned that the proposed algorithm can facilitate nonplanar 3D printing using common and commercially available Cartesian-type 3D printing systems.

scholarly journals Implementing a 3D printing service in a biomedical library

2017 ◽  
Vol 105 (1) ◽  
Author(s):  
Verma Walker, MLIS
Keyword(s):  
Problem Solving ◽  
3D Printing ◽  
3D Modeling ◽  
Three Dimensional ◽  
National Institutes Of Health ◽  
3D Printer ◽  
Service Model ◽  
Steep Learning Curve ◽  
3D Printers ◽  
Creative Problem

Three-dimensional (3D) printing is opening new opportunities in biomedicine by enabling creative problem solving, faster prototyping of ideas, advances in tissue engineering, and customized patient solutions. The National Institutes of Health (NIH) Library purchased a Makerbot Replicator 2 3D printer to give scientists a chance to try out this technology. To launch the service, the library offered training, conducted a survey on service model preferences, and tracked usage and class attendance. 3D printing was very popular, with new lab equipment prototypes being the most common model type. Most survey respondents indicated they would use the service again and be willing to pay for models. There was high interest in training for 3D modeling, which has a steep learning curve. 3D printers also require significant care and repairs. NIH scientists are using 3D printing to improve their research, and it is opening new avenues for problem solving in labs. Several scientists found the 3D printer so helpful they bought one for their labs. Having a printer in a central and open location like a library can help scientists, doctors, and students learn how to use this technology in their work.

scholarly journals Formation of practical skills modeling and printing of three-dimensional objects in the process of professional training of IT specialists

2020 ◽  
Vol 166 ◽  
pp. 10016
Author(s):  
Ihor Hevko ◽  
Olha Potapchuk ◽  
Taras Sіtkar ◽  
Iryna Lutsyk ◽  
Pavlo Koliasa
Keyword(s):  
Sustainable Development ◽  
Professional Training ◽  
Three Dimensional ◽  
Professional Competencies ◽  
Practical Skills ◽  
Technological Parameters ◽  
Three Dimensional Objects ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
3D Printers

The article discusses the current technology of three-dimensional modeling and prospects for its implementation in the structure of the modern system of professional training of IT specialists according to the concepts of sustainable development. The problems have been actualized and the methodology for three-dimensional modeling and printing has been proposed by using modern software, in particular, the features of using the basic core of geometric design and software preparation of the model for printing have been presented. An algorithm for the formation of practical skills of students in hardware preparation and calibration of 3D printers, the adjustment of the main technological parameters of work, preparation for the manufacture of a spatial model has been proposed. The developed algorithm promotes to the formation of practical skills of modeling and printing three-dimensional objects in future IT-specialists of vocational education, contributes to the formation of their professional competencies. In turn, this contributes to the formation of professional competencies among future IT specialists and creates the need for systematic improvement of knowledge and their creative implementation in practice with a more efficient use of IT technologies, which is the basis in solving the problems of sustainable development of society.

A Heuristic Scaling Strategy for Multi-Robot Cooperative Three-Dimensional Printing

2020 ◽  
Vol 20 (4) ◽  
Author(s):  
Laxmi Poudel ◽  
Chandler Blair ◽  
Jace McPherson ◽  
Zhenghui Sha ◽  
Wenchao Zhou
Keyword(s):  
3D Printing ◽  
Fused Deposition Modeling ◽  
Three Dimensional ◽  
Evaluation Framework ◽  
Geometric Constraints ◽  
Mathematical Representation ◽  
Printing Process ◽  
Fused Deposition ◽  
3D Printers ◽  
Printing Time

Abstract While three-dimensional (3D) printing has been making significant strides over the past decades, it still trails behind mainstream manufacturing due to its lack of scalability in both print size and print speed. Cooperative 3D printing (C3DP) is an emerging technology that holds the promise to mitigate both of these issues by having a swarm of printhead-carrying mobile robots working together to finish a single print job cooperatively. In our previous work, we have developed a chunk-based printing strategy to enable the cooperative 3D printing with two fused deposition modeling (FDM) mobile 3D printers, which allows each of them to print one chunk at a time without interfering with the other and the printed part. In this paper, we present a novel method in discretizing the continuous 3D printing process, where the desired part is discretized into chunks, resulting in multi-stage 3D printing process. In addition, the key contribution of this study is the first working scaling strategy for cooperative 3D printing based on simple heuristics, called scalable parallel arrays of robots for 3DP (SPAR3), which enables many mobile 3D printers to work together to reduce the total printing time for large prints. In order to evaluate the performance of the printing strategy, a framework is developed based on directed dependency tree (DDT), which provides a mathematical and graphical description of dependency relationships and sequence of printing tasks. The graph-based framework can be used to estimate the total print time for a given print strategy. Along with the time evaluation metric, the developed framework provides us with a mathematical representation of geometric constraints that are temporospatially dynamic and need to be satisfied in order to achieve collision-free printing for any C3DP strategy. The DDT-based evaluation framework is then used to evaluate the proposed SPAR3 strategy. The results validate the SPAR3 as a collision-free strategy that can significantly shorten the printing time (about 11 times faster with 16 robots for the demonstrated examples) in comparison with the traditional 3D printing with single printhead.

Micro-Manufacturing Using Online 3D Printing

2017 ◽  
Vol 872 ◽  
pp. 94-98
Author(s):  
Yi Ping Chen ◽  
Ming Der Yang
Keyword(s):  
3D Printing ◽  
3D Modeling ◽  
Mass Production ◽  
3D Model ◽  
Paper Briefly ◽  
Machining Processes ◽  
Micro Manufacturing ◽  
3D Printers ◽  
Subtractive Machining ◽  
Physical Components

As an additive manufacturing process, 3D printing provides conceptualizers and designers an opportunity to quickly produce physical components and concept models at reasonable costs. Such manufacturing is distinct from mass production involving traditional subtractive machining processes. This paper briefly describes microscale manufacturing involving a series of 3D-printing-related processes, including 3D modeling, 3D model slicing, printing, and production. Furthermore, specifications of 3D printers, a major component of the 3D printing process, impedes the entry of new micro-manufacturing businesses, such as the maximum printing volume, printing material, positioning accuracy, layer thickness, and price, were analyzed. In addition, online 3D printing service could be an alternative to overcome the difficulty of new entry to micro-manufacturing by a step-by-step instruction through internet. Commercially available online 3D printing services were surveyed and compared in material and cost in this paper.

scholarly journals APPLICATION OF ADDITIVE TECHNOLOGIES IN CONSTRUCTION AND IN THE PRODUCTION OF CERAMIC PRODUCTS

2020 ◽  
pp. 134-141
Author(s):  
N. Kirillova ◽  
A. Alekseeva ◽  
A. Egorova
Keyword(s):  
3D Printing ◽  
Raw Materials ◽  
Three Dimensional ◽  
Additive Technologies ◽  
High Temperature Strength ◽  
Form Complex ◽  
Advantages And Disadvantages ◽  
Analytical Review ◽  
3D Printers ◽  
The Republic

Additive technologies that allow creating volume objects of different complexity are becoming popular in different industries. There is an increase in the scale of introduction of 3D printing technologies in the construction industry, including in the production of ceramic products. With the help of modern additive technologies, different models, products and designs are created. They can be complex and can be made from different materials. Experts are wondering what the future holds for additive technologies in construction, as well as in ceramic production, as these technologies can save resources, reduce the time of the technological process and form complex shapes. The article presents an analytical review of the global application of additive technologies in construction, as well as in the manufacture of ceramic products. The advantages and disadvantages, the possibilities of 3D printing are considered. The creation of ceramic three-dimensional products is still a rare area of additive technologies that requires research. The production of ceramic products, superior to other materials in terms of high temperature strength, hardness, chemical and thermal resistance, has a high potential for the use of additive technologies. The types of construction 3D printers and raw materials for them are analyzed. The results of a study of the properties of clay raw materials of the Sannikovsky, Namtsyrsky and Kangalassky deposits of the Republic of Sakha (Yakutia) are presented.

3D PRINTERS - REALITY AND FUTURE. ASPECTS OF INFORMATION SECURITY

2020 ◽  
pp. 525-534
Author(s):  
Петр Юрьевич Филяк ◽  
Денис Алексеевич Пажинцев ◽  
Илья Алексеевич Тырин ◽  
Александр Григорьевич Остапенко ◽  
Юрий Юрьевич Громов
Keyword(s):  
3D Model ◽  
Three Dimensional ◽  
Physical Object ◽  
Construction Sites ◽  
Peripheral Device ◽  
Three Dimensional Objects ◽  
3D Printers ◽  
Living Organisms ◽  
3D Shapes ◽  
Very High

На сегодняшний день на современном уровне развития технического прогресса человечество разработало множество устройств и способов создания трехмерных тел (объемных тел), каждый из которых имеет как свои преимущества, так и недостатки. Среди этого перечня особого внимания заслуживают устройства, которые имеют целый ряд неоспоримых преимуществ. Во-первых, они позволяют тиражировать трехмерные тела практически в неограниченных количествах. Во-вторых, точность построения объемных фигур очень высока. В-третьих, они позволяют работать с любыми материалами, в зависимости от применения которых, могут получаться различные трехмерные объекты - от реальных строительных объектов - до реальных тканей и органов растительных и живых организмов. Причем объектов, как макроскопических размеров - десятки метров, так и микроскопических, вплоть до нано уровня. Эти устройства вошли в обиход под названием «3D - принтеры». 3D-принтер - это периферийное устройство для создания физического объекта путем послойного формирования его по его цифровой 3D-модели. Данное устройство тесно связано с нашей жизнью. С каждым днем человек находит новое применение для 3D-принтеров, эти устройства уже являются незаменимыми помощниками во многих сферах нашей жизнедеятельности. Создание 3D-принтера, несомненно, является технологическим прорывом. To date, at the current level of technological progress, humanity has developed many devices and ways to create three-dimensional bodies (volume bodies), each of which has both its advantages and disadvantages.khmer body almost unlimited quantities. Secondly, the accuracy of building 3D shapes is very high. Thirdly, they allow you to work with any materials, depending on the use of which, can be obtained a variety of three-dimensional objects - from real construction sites - to real tissues and organs of plant and living organisms. And objects, both macroscopic sizes - tens of meters, and microscopic, up to the nano level. These devices came into use under the name "3D printers." 3D-printer is a peripheral device for creating a physical object by layering it on its digital 3D-model.

Three-Dimensional Printing: Collaborative Nurse-Led Research

2020 ◽  
Vol 39 (1) ◽  
pp. 243-261
Author(s):  
Lori Lioce ◽  
Kimberly Budisalich ◽  
Darlene A. Showalter
Keyword(s):  
3D Printing ◽  
Interprofessional Collaboration ◽  
Three Dimensional ◽  
Nursing Programs ◽  
Nursing Program ◽  
Successful Implementation ◽  
Efficient Manner ◽  
Healthcare Needs ◽  
3D Printers ◽  
Cost Efficient

Though three-dimensional (3D) printing is often touted as cutting-edge technology, it actually made its appearance in the 1980s. Since then, this technology has made significant progress from its humble origins of layering polymers to create simple structures to the more sophisticated printing with elements such as metals used to create complex structures for aircraft. This technology has advanced and been finely tuned largely in thanks to the engineering profession. The variance within the printers, software, and printing material allows for broad application beyond engineering and manufacturing. Healthcare and academic applications are beginning to get traction. The National Institutes of Health has established a platform for sharing 3D ideas to support biotechnology and modeling for healthcare. It makes sense that nursing programs would, minimally, utilize 3D printers to enrich their institutional simulation laboratory and to manufacture specialty materials for training students in a cost-efficient manner. Opportunities to collaborate with other academic departments and community partners in the development and production of timely and effective solutions to pressing healthcare needs enriches student learning, nursing programs, and their graduates. Faculty buy-in and purposeful integration throughout the curriculum are vital variables associated with the successful implementation of 3D printing in a nursing program. Additional benefits include opportunities for publications, presentation of papers, and interprofessional collaboration.

scholarly journals A New Leap in Periodontics: Three-dimensional (3D) Printing

2017 ◽  
Vol 8 (1-2) ◽  
pp. 1-7
Author(s):  
Ruchir Patel ◽  
Tejal Sheth ◽  
Shilpi Shah ◽  
Mihir Shah
Keyword(s):  
3D Printing ◽  
Automobile Industry ◽  
Periodontal Regeneration ◽  
Three Dimensional ◽  
Smart Devices ◽  
Three Dimensional Printing ◽  
3D Printers ◽  
Manufacturing Applications ◽  
The Masses ◽  
Dimensional Printing

Dentistry is truly a great profession and recently it is coming to the terms of use of technology and tech-savvy dentists, who nowadays use smart devices to make their life easier. Researchers are constantly innovating to integrate techno-logy into dentistry. Of all the latest technological innovations in dentistry, the most talked about innovations are three-dimensional (3D) printing and cone beam computed tomography (CBCT), which have made the treatment planning and execution a whole lot easier. Three-dimensional printing like CBCT has been gaining much popularity in the masses. Three-dimensional printing technologies are evolving rapidly in the recent years and can be used with a wide array of different materials. In addition to rapid prototyping, the dominant use in the past, they are now being used in all manner of manufacturing applications in a diversity of industries such as sports goods, fashion items such as jewelry and necklaces to aerospace components, tools for automobile industry, and medical implants also in dentistry for producing models, making scaffolds, etc. In future, 3D printing has ability to change the way many products are manufactured and produced and bring an era of ‘personal manufacturing’. This article introduces 3D printing and gives little information about the technology behind the working of 3D printers. It also gives information about the applications of 3D printers and materials most often used for 3D printed scaffolds for periodontal regeneration.

3D Printing: Basic Concepts Mathematics and Technologies

2013 ◽  
Vol 2 (2) ◽  
pp. 58-71
Author(s):  
Alexander Rompas ◽  
Charalampos Tsirmpas ◽  
Ianos Papatheodorou ◽  
Georgia Koutsouri ◽  
Dimitris Koutsouris
Keyword(s):  
3D Printing ◽  
Three Dimensional ◽  
Real Life ◽  
Fused Deposition Modelling ◽  
Layer By Layer ◽  
Three Dimensional Objects ◽  
Stl File ◽  
Fused Deposition ◽  
3D Printers ◽  
Object Layer

3D printing is about being able to print any object layer by layer. But if one questions this proposition, can one find any three-dimensional objects that can't be printed layer by layer? To banish any disbeliefs the authors walked together through the mathematics that prove 3d printing is feasible for any real life object. 3d printers create three-dimensional objects by building them up layer by layer. The current generation of 3d printers typically requires input from a CAD program in the form of an STL file, which defines a shape by a list of triangle vertices. The vast majority of 3d printers use two techniques, FDM (Fused Deposition Modelling) and PBP (Powder Binder Printing). One advanced form of 3d printing that has been an area of increasing scientific interest the recent years is bioprinting. Cell printers utilizing techniques similar to FDM were developed for bioprinting. These printers give us the ability to place cells in positions that mimic their respective positions in organs. Finally, through a series of case studies the authors show that 3d printers have made a massive breakthrough in medicine lately.

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