scholarly journals Preparation and Performance Evaluation of Duotone 3D-Printed Polyetheretherketone as Oral Prosthetic Materials: A Proof-of-Concept Study

Polymers ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1949
Author(s):  
Ling Ding ◽  
Wei Lu ◽  
Jiaqi Zhang ◽  
Chuncheng Yang ◽  
Guofeng Wu
Keyword(s):  
Titanium Dioxide ◽  
Performance Evaluation ◽  
Mechanical Performance ◽  
Mechanical Tests ◽  
Flexural Properties ◽  
Proof Of Concept ◽  
Tooth Color ◽  
Dental Application ◽  
3D Printed ◽  
And Performance

Literature has reported the successful use of 3D printed polyetheretherketone (PEEK) to fabricate human body implants and oral prostheses. However, the current 3D printed PEEK (brown color) cannot mimic the vivid color of oral tissues and thus cannot meet the esthetical need for dental application. Therefore, titanium dioxide (TiO2) and ferric oxide (Fe2O3) were incorporated into PEEK to prepare a series of tooth-color and gingival-color PEEK composites in this study. Through color measurements and mechanical tests, the color value and mechanical performance of the 3D printed PEEK composites were evaluated. In addition, duotone PEEK specimens were printed by a double nozzle with an interface between tooth-color and gingival-color parts. The mechanical performance of duotone PEEK with two different interfaces (horizontal and vertical) was investigated. With the addition of TiO2 and Fe2O3, the colors of 3D printed PEEK composites become closer to that of dental shade guides. 3D printed PEEK composites generally demonstrated superior tensile and flexural properties and hence have great potential in the dental application. In addition, duotone 3D printed PEEK with a horizontal interfacial orientation presented better mechanical performance than that with a vertical one.

Structural design and mechanical performance evaluations of flexible and lightweight belt by CFRP

2020 ◽  
Vol 34 (07n09) ◽  
pp. 2040034
Author(s):  
Sung-Youl Bae ◽  
Yun-Hae Kim
Keyword(s):  
Performance Evaluation ◽  
Structural Design ◽  
Mechanical Performance ◽  
Steel Wire ◽  
Load Condition ◽  
Mechanical Tests ◽  
Wire Rope ◽  
High Rise ◽  
Reinforced Plastic ◽  
And Performance

This research presents the structural design and mechanical performance evaluation results of a lightweight belt for high-rise elevators. Weight reduction of elevator components is indispensable in developing ultra-high-rise elevators. In this study, the structural design and performance evaluation of high-rise elevator ropes were carried out. The weight of the newly designed Carbon Fiber Reinforced Plastic (CFRP) belt was reduced by 30% compared with the original steel wire rope. The structural analysis results of the CFRP belt showed that the design criteria were met on the design load condition of the belt. Also, mechanical tests were executed to verify the mechanical characteristics of the newly developed belt, with the results showing that the belt had sufficient structural performance compared with conventional steel wire rope.

scholarly journals Mechanical Performance Under Various Conditions of 3D Printed Polylactide Composites With Natural Fibers

2021 ◽  
Author(s):  
Karolina E. Mazur ◽  
Aleksandra Borucka ◽  
Paulina Kaczor ◽  
Szymon Gądek ◽  
Stanislaw Kuciel
Keyword(s):  
Elevated Temperatures ◽  
Mechanical Performance ◽  
Natural Fibers ◽  
Crystallization Rate ◽  
Mechanical Tests ◽  
Hydrothermal Degradation ◽  
3D Printed ◽  
The Impact ◽  
Different Levels ◽  
Additive Methods

Abstract In the study, polylactide-based (PLA) composites modified with natural particles (wood, bamboo, and cork) and with different levels of infilling (100%, 80%, and 60%) obtained by additive methods were tested. The effect of type fiber, infill level and crystallization rate on the mechanical properties were investigated by using tensile, flexural, and impact tests. The materials were subjected to mechanical tests carried out at 23 and 80 °C. Furthermore, hydrothermal degradation was performed, and its effect on the properties was analyzed. The addition of natural fillers and different level of infilling result in a similar level of reduction in the properties. Composites made of PLA are more sensitive to high temperature than to water. The decrease in Young's modulus of PLA at 80 °C was 90%, while after 28 days of hydrodegradation ~ 9%. The addition of fibers reduced this decrease at elevated temperatures. Moreover, the impact strength has been improved by 50% for composites with cork particles and for other lignocellulosic composites remained at the same level as for resin.

Design and performance evaluation of 3D printed writing and typing assistive devices: A pragmatic single participant study

2019 ◽  
Vol 31 (1-2) ◽  
pp. 51-61
Author(s):  
Chris Maharaj ◽  
Kiran Ragoo ◽  
Vashish Sirjoosingh ◽  
Shreedevi Sahadeo ◽  
Deepak Lall ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Assistive Devices ◽  
3D Printed ◽  
And Performance

scholarly journals 3D-printed tubes with complex internal fins for heat transfer enhancement—CFD analysis and performance evaluation

AIMS Energy ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 27-47
Author(s):  
Chao Wei ◽  
◽  
Gabriel Alexander Vasquez Diaz ◽  
Kun Wang ◽  
Peiwen Li ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Performance Evaluation ◽  
Heat Transfer Enhancement ◽  
Cfd Analysis ◽  
Transfer Enhancement ◽  
3D Printed ◽  
And Performance ◽  
Internal Fins

3D-printed Current Collector Plates: Simulation and Performance Evaluation in a Mini Fuel Cell

Fuel Cells ◽  
2018 ◽  
Vol 18 (6) ◽  
pp. 782-788 ◽  
Author(s):  
J. A. Cano-López ◽  
D. Ortega-Díaz ◽  
A. Duarte-Moller ◽  
A. Encinas ◽  
A. Dector ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Fuel Cell ◽  
Current Collector ◽  
3D Printed ◽  
And Performance

scholarly journals Green Composites Based on PLA and Agricultural or Marine Waste Prepared by FDM

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1361
Author(s):  
Roberto Scaffaro ◽  
Andrea Maio ◽  
Emmanuel Fortunato Gulino ◽  
Giuseppe Alaimo ◽  
Marco Morreale
Keyword(s):  
Mechanical Performance ◽  
Low Cost ◽  
Three Dimensional ◽  
Posidonia Oceanica ◽  
Positive Influence ◽  
Green Composites ◽  
3D Printed ◽  
And Performance ◽  
Marine Waste ◽  
Natural Fillers

Three dimensional-printability of green composites is recently growing in importance and interest, especially in the view of feasibility to valorize agricultural and marine waste to attain green fillers capable of reducing bioplastic costs, without compromising their processability and performance from an environmental and mechanical standpoint. In this work, two lignocellulosic fillers, obtained from Opuntia ficus indica and Posidonia oceanica, were added to PLA and processed by FDM. Among the 3D printed biocomposites investigated, slight differences could be found in terms of PLA molecular weight and filler aspect ratio. It was shown that it is possible to replace up to 20% of bioplastic with low cost and ecofriendly natural fillers, without significantly modifying the processability and the mechanical performance of the neat matrix; at the same time, an increase of surface hydrophilicity was found, with possible positive influence on the biodegradability of such materials after disposal.

scholarly journals Evaluating the Mechanical Properties of Commonly Used 3d Printed ABS and PLA Polymers with Multi Layered Polymers

2019 ◽  
Vol 8 (6) ◽  
pp. 2351-2356 ◽  
Keyword(s):  
Flexural Strength ◽  
Rapid Prototyping ◽  
Mechanical Performance ◽  
Cost Effective ◽  
Optical Microscope ◽  
Mechanical Tests ◽  
Physical Models ◽  
Chemical Effect ◽  
Layer By Layer ◽  
3D Printed

Rapid prototyping is a technology capable of producing physical models in layer by layer directly from CAD model without any tools, dies and fixtures while involving little human intervention. Rapid prototyping can fabricate complex shapes easily as compared with traditional manufacturing. It also helps in early detection and reduction of design errors. Thermoplastics used in this study are ABS and PLA which are easily available and cost effective. This study aim to investigate the mechanical performance of the 3D printed ABS and PLA thermoplastics and comparing them with the sample produced by preparing the multilayer of those themoplastics. An attempt is made to increase the mechanical performance by preparing the samples with multilayer structures using ABS and PLA. Mechanical tests like Tensile test, Compressive test, Flexural strength, Microhardness and surface roughness have been conducted as per the ASTM standards. Microstructures of the samples are acquired with optical microscope. From the results obtained ABS exhibited more flexural strength and higher elongation before breaking. But ABS consists of chemicals when heated to a certain temperature releases organic volatile compounds which are health hazardous. In order to reduce the chemical effect of ABS, a thermoplastic called PLA is used which is produced naturally and is incorporated to decrease ABS content and achieve the properties of ABS. In the present work the flexural strength of layered sample is nearer to the ABS. So, inorder to reduce the chemical effects of ABS the layered polymer can be used

3D Printed Segmented Flexible Pneumatic Actuator

2019 ◽  
Author(s):  
David Gonzalez ◽  
Jose Garcia ◽  
Brittany Newell
Keyword(s):  
Fused Deposition Modeling ◽  
Mechanical Performance ◽  
Continuous Process ◽  
Pneumatic Actuator ◽  
Fused Deposition ◽  
Mold Casting ◽  
Deposition Modeling ◽  
3D Printed ◽  
And Performance ◽  
Soft Actuators

Abstract Soft actuators have been studied and analyzed as a new solution for soft robotic technologies. These types of actuators have many advantages due to their predictable deformations and their ease of control, enabling them to hold and move delicate objects performing complex movements in confined spaces. Soft actuators can be made using different manufacturing processes, but the most common is mold casting. However, this manufacturing process involves several steps, increasing the manufacturing time and hindering changes in the design. This paper presents a novel design of a 3D printed soft pneumatic actuator based on additive manufacturing, achieving design versatility and performance. The produced actuator has seven that can be individually controlled. The actuators were made using fused deposition modeling (FDM) technology in one continuous process and without support material. The mechanical performance of the soft actuators was demonstrated, analyzing the deformation in the z-axis based on input pressure.

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