scholarly journals Selection of compositions for additive technologies in construction

2019 ◽  
Vol 97 ◽  
pp. 06018 ◽  
Author(s):  
Anastasiia Sharanova ◽  
Maria Dmitrieva
Keyword(s):  
Digital Technology ◽  
Field Experiments ◽  
Scientific Literature ◽  
Technological Development ◽  
Three Dimensional ◽  
Three Dimensional Printing ◽  
Construction Methods ◽  
Main Components ◽  
Dimensional Printing ◽  
Selection Of

Three-dimensional printing is an innovative digital technology and is one of the most significant achievements in the industrial and technological development of modernity. Digital 3D technologies have reached a colossal level of development over a period of about half a century since their invention. Using 3D printing in the construction of low-rise buildings, it becomes possible to implement almost any ideas and achieve the best architectural expressiveness of objects. The aim of this work is to create cement-based compounds that can be used in additive construction methods. A review of the scientific literature on this topic was carried out, the main components of the mixture were identified, and a series of field experiments were conducted. According to the results of the work, the optimal composition for 3D construction printing was determined.

scholarly journals 3D printing and spine surgery

2020 ◽  
Vol 28 (2) ◽  
pp. 230949902092708 ◽  
Author(s):  
Alpaslan Senkoylu ◽  
Ismail Daldal ◽  
Mehmet Cetinkaya
Keyword(s):  
Spine Surgery ◽  
Technological Development ◽  
Three Dimensional ◽  
Implantable Devices ◽  
Communication Education ◽  
Three Dimensional Printing ◽  
Novel Technology ◽  
Anatomical Images ◽  
Surgical Simulations ◽  
Dimensional Printing

Rapid prototyping (RP), also known as three-dimensional printing (3DP), allows the rapid conversion of anatomical images into physical components by the use of special printers. This novel technology has also become a promising innovation for spine surgery. As a result of the developments in 3DP technology, production speeds have increased, and costs have decreased. This technological development can be used extensively in different parts of spine surgery such as preoperative planning, surgical simulations, patient–clinician communication, education, intraoperative guidance, and even implantable devices. However, similar to other emerging technologies, the usage of RP in spine surgery has various drawbacks that are needed to be addressed through further studies.

scholarly journals Three-dimensional printing, muscles, and skeleton: mechanical functions of living wood

2019 ◽  
Vol 70 (14) ◽  
pp. 3453-3466 ◽  
Author(s):  
Bernard Thibaut
Keyword(s):  
Additive Manufacturing ◽  
Field Experiments ◽  
Secondary Growth ◽  
Three Dimensional ◽  
Wood Properties ◽  
Force Generation ◽  
Three Dimensional Printing ◽  
Pipe System ◽  
External Forces ◽  
Dimensional Printing

AbstractWood is well defined as an engineering material. However, living wood in the tree is often regarded only as a passive skeleton consisting of a sophisticated pipe system for the ascent of sap and a tree-like structure made of a complex material to resist external forces. There are two other active key roles of living wood in the field of biomechanics: (i) additive manufacturing of the whole structure by cell division and expansion, and (ii) a ‘muscle’ function of living fibres or tracheids generating forces at the sapwood periphery. The living skeleton representing most of the sapwood is a mere accumulation of dead tracheids and libriform fibres after their programmed cell death. It keeps a record of the two active roles of living wood in its structure, chemical composition, and state of residual stresses. Models and field experiments define four biomechanical traits based on stem geometry and parameters of wood properties resulting from additive manufacturing and force generation. Geometric parameters resulting from primary and secondary growth play the larger role. Passive wood properties are only secondary parameters, while dissymmetric force generation is key for movement, posture control, and tree reshaping after accidents.

Development, evaluation, and selection of rapid tooling process chains for sand casting of functional prototypes

2007 ◽  
Vol 221 (9) ◽  
pp. 1441-1450 ◽  
Author(s):  
D Dimitrov ◽  
W van Wijck ◽  
N de Beer ◽  
J Dietrich
Keyword(s):  
Three Dimensional ◽  
Rapid Tooling ◽  
Sand Casting ◽  
Printing Process ◽  
Three Dimensional Printing ◽  
Core Technology ◽  
Process Chains ◽  
Accuracy And Repeatability ◽  
Dimensional Printing ◽  
Selection Of

This paper discusses the results obtained from studies on different rapid tooling process chains for improved design and manufacture of foundry equipment for sand casting of prototypes in final material for functional and pre-production tests of vehicles, using the three-dimensional printing process as core technology. Subsequently, while considering aspects such as time, cost, quality (accuracy and surface roughness), and tool life, a framework for evaluation and selection of the most suitable process chain in accordance to specific requirements is presented. Apart from only using these process chains for prototype manufacturing, initial results from a study to apply one of these process chains in automated sand casting full production is also presented. This research builds on an in-depth characterization of the accuracy and repeatability of a three-dimensional printing process.

Build or Print

2020 ◽  
Vol 4 (1) ◽  
Author(s):  
Kiril Stoyanov ◽  
◽  
◽  
Keyword(s):  
3D Printing ◽  
Industrial Revolution ◽  
Three Dimensional ◽  
Three Dimensional Printing ◽  
The Past ◽  
Construction Methods ◽  
Traditional Construction ◽  
Cologne Cathedral ◽  
Dimensional Printing ◽  
People Today

Some of the most impressive architectural masterpieces of the past, such as the Cologne Cathedral or the Cathedral in Milan, have taken several centuries for their creation and have involved thousands of people. Today, a glossy office building in Dubai has been built or rather printed in just 17 days, with 29 workers involved. Three-dimensional printing has been identified as the Fourth Industrial Revolution and is increasingly replacing traditional construction methods. There is no doubt that 3D printing will affect the design and production of buildings. Does the fact that 3D printing can be used means that it should replace analog with digital construction?

An introduction of an easy-operating and economical technique for tissue microarray preparation

2019 ◽  
Vol 73 (7) ◽  
pp. 403-407
Author(s):  
Yi-Jing Chen ◽  
Chun-Mei Yang ◽  
Jiang-Sheng Huang ◽  
Ping Wang ◽  
Yan-Hua Lv ◽  
...  
Keyword(s):  
Tissue Microarray ◽  
Three Dimensional ◽  
Preparation Technique ◽  
Three Dimensional Printing ◽  
Construction Methods ◽  
Donor Block ◽  
Straight Lines ◽  
Auxiliary Device ◽  
Dimensional Printing ◽  
Recipient Block

AimTissue microarray (TMA) is a powerful and effective tool for in situ tissue analysis. However, manual TMA construction methods showed varied qualities. This study aimed to raise a standardised TMA preparation technique that can be easily operated and is economical.MethodsA sampling needle was used to punch the tissue rods from the donor block and holes in the recipient block. To indicate the dots’ positions and ensure vertical punching, a novel auxiliary device made using commercial three-dimensional printing technology was attached. The TMA block was made up of tissue rods and a recipient block.ResultsA 77-rod (7×11) TMA block was constructed. The rows and columns were fixed in straight lines. There was no specimen loss during the process of embedding.ConclusionsAn alternative method for the construction of TMA blocks that met the basic requirement of many laboratories and can be effortlessly performed was presented.

A novel fast disintegrating tablet fabricated by three‐dimensional printing

2009 ◽  
Vol 00 (00) ◽  
pp. 090730035508060-7
Author(s):  
Deng-Guang Yu ◽  
Chris Branford-White ◽  
Yi-Cheng Yang ◽  
Li-Min Zhu ◽  
Edward William Welbeck ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Three Dimensional Printing ◽  
Fast Disintegrating Tablet ◽  
Dimensional Printing

Central ossifying fibroma of mandible

2020 ◽  
Vol 13 (12) ◽  
pp. e239286
Author(s):  
Kumar Nilesh ◽  
Prashant Punde ◽  
Nitin Shivajirao Patil ◽  
Amol Gautam
Keyword(s):  
Fibrous Tissue ◽  
Three Dimensional ◽  
Facial Asymmetry ◽  
Ossifying Fibroma ◽  
Mandible Reconstruction ◽  
Three Dimensional Printing ◽  
Osseous Lesion ◽  
Large Size ◽  
Dimensional Printing

Ossifying fibroma (OF) is a rare, benign, fibro-osseous lesion of the jawbone characterised by replacement of the normal bone with fibrous tissue. The fibrous tissue shows varying amount of calcified structures resembling bone and/or cementum. The central variant of OF is rare, and shows predilection for mandible among the jawbone. Although it is classified as fibro-osseous lesion, it clinically behaves as a benign tumour and can grow to large size, causing bony swelling and facial asymmetry. This paper reports a case of large central OF of mandible in a 40-year-old male patient. The lesion was treated by segmental resection of mandible. Reconstruction of the surgical defect was done using avascular fibula bone graft. Role of three-dimensional printing of jaw and its benefits in surgical planning and reconstruction are also highlighted.

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