Data-Driven Predictive Modeling of Tensile Behavior of Parts Fabricated by Cooperative 3D Printing

Abstract 3D printing has been extensively used for rapid prototyping as well as low-volume production in aerospace, automotive, and medical industries. However, conventional manufacturing processes (i.e., injection molding and CNC machining) are more economical than 3D printing for high-volume mass production. In addition, current 3D printing techniques are not capable of fabricating large components due to the limited build size of commercially available 3D printers. To increase 3D printing throughput and build volume, a novel cooperative 3D printing technique has been recently introduced. Cooperative 3D printing is an additive manufacturing process where individual mobile 3D printers collaborate on printing a part simultaneously, thereby increasing printing speed and build volume. While cooperative 3D printing has the potential to fabricate larger components more efficiently, the mechanical properties of the components fabricated by cooperative 3D printing have not been systematically characterized. This paper aims to develop a data-driven predictive model that predicts the tensile strength of the components fabricated by cooperative 3D printing. Experimental results have shown that the predictive model is capable of predicting tensile strength as well as identifying the significant factors that affect the tensile strength.

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Comparison of Supermacroporous Polyester Matrices Fabricated by Thermally Induced Phase Separation and 3D Printing Techniques

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.822.277 ◽

2019 ◽

Vol 822 ◽

pp. 277-283

Author(s):

Mariia Stepanova ◽

Aleksei Eremin ◽

Ilia Averianov ◽

Iosif Gofman ◽

Antonina Lavrentieva ◽

...

Keyword(s):

Phase Separation ◽

3D Printing ◽

Three Dimensional ◽

Uniaxial Compression Test ◽

Thermally Induced Phase Separation ◽

Cell Penetration ◽

Thermally Induced ◽

Printing Technique ◽

3D Printing Technique ◽

Printing Techniques

Supermacroporous three-dimensional matrices based on poly-D,L-lactide or polycaprolactone were fabricated by thermally induced phase separation method and 3D printing technique. The morphology and mechanical properties of the resulting matrices were studied with the use of optical and scanning electron microscopy and the uniaxial compression test, respectively. All matrices were characterized with supermacroporous structure suitable for cell penetration. A significant increase in Young's modulus and tensile strength was established for both polymer matrices prepared by 3D printing technique.

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Universal CubeSat Platform Design Technique

MATEC Web of Conferences ◽

10.1051/matecconf/201817901002 ◽

2018 ◽

Vol 179 ◽

pp. 01002

Author(s):

Zhiyong Chen

Keyword(s):

3D Printing ◽

System Development ◽

Low Cost ◽

Fem Simulation ◽

Frame Structure ◽

Scientific Impact ◽

Advantages And Disadvantages ◽

Small Parts ◽

3D Printing Technique ◽

Printing Techniques

This article summarizes cubesat technology, provides examples of their scientific impact, and describes the design and the manufacturing of a Cubesat platform. As for the design of the overall frame structure of the CubeSat, we have searched a lot of literature and consulted many predecessors' designs, and collected many satellite structure images. After analyzing the data, we aimed at all kinds of different structures’ advantages and disadvantages, finally we got a best design. It is a satellite of cubic shape (10 cm per side), weighing approximately 1kg, based on the creation of a central body made of different material using the 3D-Printing techniques. The 3D-Printing technique has several advantages including fast implementation, accuracy in manufacturing small parts and low cost. Moreover, concerning the construction of a small satellite, this technique is very useful thanks to the accuracy achievable in details, which are sometimes difficult and expensive to realize with the use of tools machine. The structure must be able to withstand the launch loads. For this reason, several simulations using an FEM simulation and an intensive vibration test campaign will be performed in the system development and test phase.

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CUSTOMIZATION BASED ON CAD AUTOMATION IN PRODUCTION OF MEDICAL SCREWS BY 3D PRINTING

Informatyka Automatyka Pomiary w Gospodarce i Ochronie Środowiska ◽

10.35784/iapgos.2746 ◽

2021 ◽

Vol 11 (3) ◽

pp. 18-21

Author(s):

Piotr Bednarczuk

Keyword(s):

3D Printing ◽

Cnc Machining ◽

Cancellous Screw ◽

Herbert Screw ◽

Different Types ◽

Input Parameters ◽

Printing Techniques ◽

Plm System

The paper presents a proposal of a complete CAD Automation solution enabling customization of the production of medical screws to individual patient requirements. The proposed approach using OLE technology enables the introduction of customization at the CAD project stage. The assembly of the surgical screw in the PLM system is generated by means of a specially developed application. The application communicates with the SolidEdge system using an API, taking into account 10 different input parameters. Three different types of medical screws have been developed in the application: the Herbert Screw, Cancellous Screw, and Malleolar Screw with three different thread types: rectangular, isosceles, and trapezoidal. The screws designed in this way can be manufactured using 3D printing techniques or CNC machining, and can be used for both humans and animals.

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Fabrication of Low Loss and Near Zero Dispersion Suspended Core Polypropylene Fibers for Terahertz Communications Using Infinity 3D Printing Technique

10.31224/osf.io/239j4 ◽

2020 ◽

Author(s):

Guofu Xu ◽

Kathirvel Nallappan ◽

Yang Cao ◽

Maksim Skorobogatiy

Keyword(s):

3D Printing ◽

Thermoplastic Composites ◽

Polypropylene Fibers ◽

Low Loss ◽

Terahertz Communications ◽

Printing Technique ◽

3D Printers ◽

Fiber Manufacturing ◽

Continuous Fabrication ◽

3D Printing Technique

In this work we explore infinity 3D printing technique to fabricate continuous several-meter-long low-loss near-zero dispersion suspended-core polypropylene fibers for application in terahertz communications. The novel filament deposition modeling (FDM)- based infinity printing technique allows continuous fabrication of unlimited in length fiber sections of complex transverse geometries using advanced thermoplastic composites, and in our opinion is poised to become a key technique for advanced terahertz fiber manufacturing. Furthermore, particular attention in our work is payed to process parameter optimization for printing with low-loss polypropylene plastic, as well as an in-depth comparison between fibers printed using standard FDM 3D printers and infinity 3D printers.

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3D-Printed Microfluidics and Potential Biomedical Applications

Frontiers in Nanotechnology ◽

10.3389/fnano.2021.609355 ◽

2021 ◽

Vol 3 ◽

Author(s):

Priyanka Prabhakar ◽

Raj Kumar Sen ◽

Neeraj Dwivedi ◽

Raju Khan ◽

Pratima R. Solanki ◽

...

Keyword(s):

3D Printing ◽

Biomedical Applications ◽

Chemical Properties ◽

Microfluidic Devices ◽

Microfluidic Chips ◽

3D Printers ◽

Broad Variety ◽

3D Printed ◽

Diagnostic Technologies ◽

Printing Techniques

3D printing is a smart additive manufacturing technique that allows the engineering of biomedical devices that are usually difficult to design using conventional methodologies such as machining or molding. Nowadays, 3D-printed microfluidics has gained enormous attention due to their various advantages including fast production, cost-effectiveness, and accurate designing of a range of products even geometrically complex devices. In this review, we focused on the recent significant findings in the field of 3D-printed microfluidic devices for biomedical applications. 3D printers are used as fabrication tools for a broad variety of systems for a range of applications like diagnostic microfluidic chips to detect different analytes, for example, glucose, lactate, and glutamate and the biomarkers related to different clinically relevant diseases, for example, malaria, prostate cancer, and breast cancer. 3D printers can print various materials (inorganic and polymers) with varying density, strength, and chemical properties that provide users with a broad variety of strategic options. In this article, we have discussed potential 3D printing techniques for the fabrication of microfluidic devices that are suitable for biomedical applications. Emerging diagnostic technologies using 3D printing as a method for integrating living cells or biomaterials into 3D printing are also reviewed.

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Application of Innovative Hydroxyapatite Materials in 3D Printing for Biocompatible Voice Implants

Revista de Chimie ◽

10.37358/rc.18.4.6211 ◽

2018 ◽

Vol 69 (4) ◽

pp. 840-842

Author(s):

Wojciech Musialik ◽

Marcin Nabialek ◽

Slawomir Letkiewicz ◽

Andrei Victor Sandu ◽

Katarzyna Bloch

Keyword(s):

3D Printing ◽

Surgical Procedures ◽

Bacterial Infections ◽

Fungal Infections ◽

Colloidal Silver ◽

Bone Implants ◽

External Ring ◽

Voice Prostheses ◽

3D Printers ◽

Silver Composite

The paper presents the possibility of using an innovative hydroxyapatite filament Ca10(PO4)6(OH)2 for printing in 3D printers of bone implants and the possibility of using it during implantation with voice prostheses. The introduction of an additional colloidal silver composite in voice implants will contribute to the reduction of bacterial infections, fungal infections and granulomatous hyperplasia. The creation of a stable external ring of the vocal fistula will remove complications associated with it with enlargement of the fistula and leakiness of voice implants. The ability to print with a hydroxyapatite filament will allow digital pre-surgery modeling of bone implants suited to the needs of surgical procedures.

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Congener-specific partition properties of chlorinated paraffins evaluated with COSMOtherm and gas chromatographic retention indices

Scientific Reports ◽

10.1038/s41598-021-84040-z ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Jort Hammer ◽

Hidenori Matsukami ◽

Satoshi Endo

Keyword(s):

Chemical Properties ◽

High Volume ◽

Retention Indices ◽

Chromatographic Retention ◽

Linear Free Energy Relationship ◽

Linear Free Energy ◽

Chlorinated Paraffins ◽

Gas Chromatographic Retention Indices ◽

High Volume Production ◽

Volume Production

AbstractChlorinated Paraffins (CPs) are high volume production chemicals and have been found in various organisms including humans and in environmental samples from remote regions. It is thus of great importance to understand the physical–chemical properties of CPs. In this study, gas chromatographic (GC) retention indexes (RIs) of 25 CP congeners were measured on various polar and nonpolar columns to investigate the relationships between the molecular structure and the partition properties. Retention measurements show that analytical standards of individual CPs often contain several stereoisomers. RI values show that chlorination pattern have a large influence on the polarity of CPs. Single Cl substitutions (–CHCl–, –CH2Cl) generally increase polarity of CPs. However, many consecutive –CHCl– units (e.g., 1,2,3,4,5,6-C11Cl6) increase polarity less than expected from the total number of –CHCl– units. Polyparameter linear free energy relationship descriptors show that polarity difference between CP congeners can be explained by the H-bond donating properties of CPs. RI values of CP congeners were predicted using the quantum chemically based prediction tool COSMOthermX. Predicted RI values correlate well with the experimental data (R2, 0.975–0.995), indicating that COSMOthermX can be used to accurately predict the retention of CP congeners on GC columns.

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Designing Inclusion: Using 3D Printing to Maximize Adapted Physical Education Participation

Teaching Exceptional Children ◽

10.1177/00400599211010191 ◽

2021 ◽

pp. 004005992110101

Author(s):

A. Chloe Simpson ◽

Andrea Ruth Taliaferro

Keyword(s):

3D Printing ◽

Student Success ◽

Assistive Technology ◽

Adapted Physical Education ◽

Physical Educators ◽

Related Service ◽

3D Printers ◽

3D Printed ◽

Education Participation ◽

Individual Design

While assistive technology is often suggested as a way to increase, maintain, or improve functional ability for individuals with disabilities within physical activity (PA) settings, cost and availability of such items are often noted as barriers. In recent years, 3D printing has become available to the general public through the adoption of 3D printers in schools, libraries, and universities. Through individual design and rapid prototyping, 3D printing can support physical educators in accommodating student need for assistive technology through a multitude of modification possibilities. This article will highlight the capacity for 3D printed assistive technology within educational settings, and will illustrate how teachers, APE specialists, and other related service personnel can utilize this technology to support student success in PE and PA settings. This article will also assist practitioners with locating, uploading, and utilizing existing collections of 3D assistive technology models from open-source websites, such as Thingiverse.

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The Direct 3D Printing of Functional PEEK/Hydroxyapatite Composites via a Fused Filament Fabrication Approach

Polymers ◽

10.3390/polym13040545 ◽

2021 ◽

Vol 13 (4) ◽

pp. 545

Author(s):

Krzysztof Rodzeń ◽

Preetam K. Sharma ◽

Alistair McIlhagger ◽

Mozaffar Mokhtari ◽

Foram Dave ◽

...

Keyword(s):

Tensile Strength ◽

3D Printing ◽

Selective Laser Sintering ◽

Fused Filament Fabrication ◽

Bone Apposition ◽

Innovative Solutions ◽

3D Printed ◽

Work Samples ◽

Viable Approach ◽

Crystalline Domains

The manufacture of polyetheretherketone/hydroxyapatite (PEEK/HA) composites is seen as a viable approach to help enhance direct bone apposition in orthopaedic implants. A range of methods have been used to produce composites, including Selective Laser Sintering and injection moulding. Such techniques have drawbacks and lack flexibility to manufacture complex, custom-designed implants. 3D printing gets around many of the restraints and provides new opportunities for innovative solutions that are structurally suited to meet the needs of the patient. This work reports the direct 3D printing of extruded PEEK/HA composite filaments via a Fused Filament Fabrication (FFF) approach. In this work samples are 3D printed by a custom modified commercial printer Ultimaker 2+ (UM2+). SEM-EDX and µCT analyses show that HA particles are evenly distributed throughout the bulk and across the surface of the native 3D printed samples, with XRD highlighting up to 50% crystallinity and crystalline domains clearly observed in SEM and HR-TEM analyses. This highlights the favourable temperature conditions during 3D printing. The yield stress and ultimate tensile strength obtained for all the samples are comparable to human femoral cortical bone. The results show how FFF 3D printing of PEEK/HA composites up to 30 wt% HA can be achieved.

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Evaluation of the Ability to Accurately Produce Angular Details by 3D Printing of Plastic Parts

Machines ◽

10.3390/machines9080150 ◽

2021 ◽

Vol 9 (8) ◽

pp. 150

Author(s):

Andrei Marius Mihalache ◽

Gheorghe Nagîț ◽

Laurențiu Slătineanu ◽

Adelina Hrițuc ◽

Angelos Markopoulos ◽

...

Keyword(s):

3D Printing ◽

Point Of View ◽

Vertex Angle ◽

Function Type ◽

Constant Height ◽

3D Printers ◽

3D Printed ◽

Mathematical Processing ◽

Plastic Parts

3D printing is a process that has become widely used in recent years, allowing the production of parts with relatively complicated shapes from metallic and non-metallic materials. In some cases, it is challenging to evaluate the ability of 3D printers to make fine details of parts. For such an assessment, the printing of samples showing intersections of surfaces with low angle values was considered. An experimental plan was designed and materialized to highlight the influence of different factors, such as the thickness of the deposited material layer, the printing speed, the cooling and filling conditions of the 3D-printed part, and the thickness of the sample. Samples using areas in the form of isosceles triangles with constant height or bases with the same length, respectively, were used. The mathematical processing of the experimental results allowed the determination of empirical mathematical models of the power-function type. It allowed the detection of both the direction of actions and the intensity of the influence exerted by the input factors. It is concluded that the strongest influence on the printer’s ability to produce fine detail, from the point of view addressed in the paper, is exerted by the vertex angle, whose reduction leads to a decrease in printing accuracy.

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