3D printed stretchable sensor based on silver nanowires-polydimethylsiloxane

2021 ◽  
pp. 2150466
Author(s):  
Qiang Li ◽  
Shengbo Sang ◽  
Qiang Zhang ◽  
Zhen Pei
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Structural Design ◽  
Silver Nanowires ◽  
Ethanol Solution ◽  
Template Method ◽  
Flexible Sensor ◽  
Physiological Signal ◽  
Additive Manufacturing Technology ◽  
3D Printed

As a new rapid additive manufacturing technology that has emerged in recent years, 3D printing technology can realize the precise manufacturing of complex and flexible sensor structures. In this study, a sensor was fabricated by injecting silver nanowires (AgNWs) ethanol solution into stretchable polydimethylsiloxane (PDMS). The substrate was used in two design configurations through a 3D printing template method, i.e. “straight” and “wave”. Compared to the straight sensor, the structural design of the wave sensor could increase the stretch range and sensitivity. In particular, the stretch range increased by 26.1% and the sensitivity improved by 96.0%. The stretchable sensor was successfully applied in pronunciation recognition and gait detection. Therefore, the stretchable sensor is also expected to be further used in fields such as foldable phones and wearable physiological signal sensors.

scholarly journals Tribological properties of 3D printed components

2018 ◽  
Vol 48 (1) ◽  
pp. 447-463 ◽  
Author(s):  
Bolesław Giemza ◽  
Marek Domański ◽  
Maciej Deliś ◽  
Dawid Kapica
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Tribological Properties ◽  
Dry Friction ◽  
Manufacturing Technology ◽  
Friction Couple ◽  
Ring Type ◽  
Additive Manufacturing Technology ◽  
Material Type ◽  
3D Printed

Abstract Additive manufacturing technology is developing in many industries, including aviation, automotive and others. 3D printing offers new possibilities in the field of designing and manufacturing of machines and devices’ components. The paper presents the results of tribological investigations of components produced in FDM printing technology. The authors presented the evaluation of sliding properties of the model friction couple – block on ring type – of available thermoplastic polymers and polymers’ composites under dry friction conditions. The authors assessed the influence of material type and printed structure on resistance to motion of prepared samples.

scholarly journals IMPLEMENTATION OF OPTIMUM ADDITIVE TECHNOLOGIES DESIGN FOR UNMANNED AERIAL VEHICLE TAKE-OFF WEIGHT INCREASE

2020 ◽  
pp. 50-60
Author(s):  
Sven Maricic ◽  
Iva Mrsa Haber ◽  
Ivan Veljovic ◽  
Ivana Palunko
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Weight Ratio ◽  
Goal Function ◽  
Manufacturing Technology ◽  
Generative Design ◽  
Additive Manufacturing Technology ◽  
3D Printed ◽  
Lift Off ◽  
The Right

The aim of this paper is to investigate the possibility of drone optimization by selecting and testing the best material suitable for additive manufacturing technology and generative design approach, i. e. shape optimization. The use of additive manufacturing technology enables the creation of models of more complex shapes that are difficult or impossible to produce with conventional processing methods. The complex and unconventional design of the drone body can open up many possibilities for weight reduction while maintaining the strength of the drone body. By using 3D printing in addition to FEM (Finite Element Method) analysis, and generative design it can identify areas of the drone body that are overdrawn, allowing it to either lift off material or simply change the design at these areas. Choosing the right material for this application is crucial in order to optimise the mechanical properties of the material with weight, material cost, printability and availability of the material and the 3D printing method, while at the same time reducing environmental pollution. The goal is to reduce the drone mass by 15–20 % using generative design tools. Mass is an important segment when prototyping a drone. If the drone is too heavy, more lift power is needed to keep the drone in the air, so the propellers have to turn faster and use more energy. Consequently, the reduction of drone mass should increase the take-off weight. In this article 5 commercial drones of similar characteristics are compared with the final proposal of our 3D printed drone (Prototype 1). The rotor distance between the drones, the weight of the electric motor and the take-off weight are compared. The goal was to produce a prototype with a big rotor distance-to-weight ratio, and take-off weight bigger than observed drones have. The defined goal function was optimized in order to evaluate characteristics of 12 different 3D printed materials. Following properties: ultimate strength, stiffness, durability, printability of the material, and required bed and extruder temperature for printing were taken in consideration to select optimal material. Polycarbonate proved to be the best choice for 3D printing UAVs

Preliminary design of 3D printed fittings for UAV

2019 ◽  
Vol 91 (5) ◽  
pp. 756-760 ◽  
Author(s):  
Jacek Mieloszyk ◽  
Andrzej Tarnowski ◽  
Michal Kowalik ◽  
Rafal Perz ◽  
Witold Rzadkowski
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Manufacturing Technology ◽  
Ease Of Use ◽  
Printing Technology ◽  
Content Type ◽  
3D Printing Technology ◽  
Additive Manufacturing Technology ◽  
3D Printed ◽  
Reduction Cost

Purpose Additive manufacturing technology, also commonly called as 3D printing technology, is entering rapidly into the aerospace world and seems to be its future. Many manufacturing processes are replaced by this technology because the ease of use, low costs and new possibilities to make complicated parts. However, there are only few solutions which present manufacturing of structurally critical parts. Design/methodology/approach Complete process of deriving loads, design of fitting geometry, numerical validation, manufacturing and strength testing was presented. The emphasis was made to show specific features of 3D technology in printed fittings for UAV. Findings The research confirms that the technology can be used for the application of fittings manufacturing. Attention needs to be paid, during the design process, to account for specific features of the 3D printing technology, which is described in details. Practical implications Without a doubt, additive manufacturing is useful for manufacturing complicated parts within limited time and with reduction cost. It was also shown that the manufactured parts can be used for highly loaded structures. Originality/value The paper shows how additive manufacturing technology can be used to produce significantly loaded parts of airplanes’ structure. Only few such examples were presented till now.

scholarly journals Impact of 3D Printing on Automotive Parts

2020 ◽  
Vol 5 (3) ◽  
pp. 79-84
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Manufacturing Process ◽  
Manufacturing Technology ◽  
Automotive Components ◽  
Additive Manufacturing Technology ◽  
Engine Part ◽  
Automotive Parts ◽  
3D Printed ◽  
The Impact

The impact of 3D Printing on automotive parts is investigated. 3D printing is an additive manufacturing technology to rapidly create prototypes by laying down a broad range of material onto successive layers of surfaces. In the automotive parts generally metal or alloy materials are used in the manufacturing. In this research we tested effect of 3D Printing on different automotive components. For the testing purpose we used Front Hub, Rear Hub, Knuckle, Calliper, CAM (engine part) and Steering pedal. After manufacturing in FDM printer using PLA material, the different properties were checked, and compare the result of existing manufactured components with the 3D printed one. The results showed that the 3D printed components having lesser weight up-to 35% to 40% with better geometric finishing. It also allows the complex geometric in the manufacturing process.

Fused Filament Fabrication 3D Printed Polylactic Acid Electroosmotic Pumps

Lab on a Chip ◽  
2021 ◽  
Author(s):  
Liang Wu ◽  
Stephen Beirne ◽  
Joan-Marc Cabot Canyelles ◽  
Brett Paull ◽  
Gordon G. Wallace ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Polylactic Acid ◽  
Fused Filament Fabrication ◽  
Flexible Approach ◽  
Electroosmotic Pump ◽  
3D Printed ◽  
Electroosmotic Pumps

Additive manufacturing (3D printing) offers a flexible approach for the production of bespoke microfluidic structures such as the electroosmotic pump. Here a readily accessible fused filament fabrication (FFF) 3D printing...

scholarly journals Rapid fabrication of MOF-based mixed matrix membranes through digital light processing

2021 ◽  
Author(s):  
Alexey Pustovarenko ◽  
Beatriz Seoane ◽  
Edy Abou-Hamad ◽  
Helen E King ◽  
Bert Weckhuysen ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Processing Speed ◽  
Mixed Matrix Membranes ◽  
Scientific Interest ◽  
Mixed Matrix ◽  
Digital Light Processing ◽  
Additive Manufacturing Technology ◽  
Rapid Fabrication ◽  
Manufacturing Methods

3D printing, also known as additive manufacturing technology, has greatly expanded across multiple sectors of technology replacing classical manufacturing methods by combining processing speed and high precision. The scientific interest...

Manufacture of Lenses and Diffraction Gratings Using DLP As an Additive Manufacturing Technology

2018 ◽  
Author(s):  
Laura Daniela Vallejo Melgarejo ◽  
Jose García ◽  
Ronald G. Reifenberger ◽  
Brittany Newell
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Diffraction Grating ◽  
Diffraction Gratings ◽  
Optical Microscope ◽  
Manufacturing Technology ◽  
Manufacturing Processes ◽  
Digital Light Processing ◽  
Additive Manufacturing Technology ◽  
Potential Use

This document condenses the results obtained when 3D printing lenses and their potential use as diffraction gratings using Digital Light Processing (DLP), as an additive manufacturing technique. This project investigated the feasibility of using DLP additive manufacturing for producing custom designed lenses and gratings. DLP was identified as the preferred manufacturing technology for gratings fabrication. Diffraction gratings take advantage of the anisotropy, inherent in additive manufacturing processes, to produce a collated pattern of multiple fringes on a substrate with completely smooth surfaces. The gratings are transmissive and were manufactured with slit separations of 10, 25 and 50 μm. More than 50 samples were printed at various build angles and mechanically treated for maximum optical transparency. The variables of the irradiance equation were obtained from photographs taken with an optical microscope. These values were used to estimate theoretical irradiance patterns of a diffraction grating and compared against the experimental 3-D printed grating. The resulting patterns were found to be remarkably similar in amplitude and distance between peaks when compared to theoretical values.

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 Additive Manufacturing in Vascular Stent Fabrication

2019 ◽  
Vol 253 ◽  
pp. 03003
Author(s):  
Lei Yang ◽  
Xin Chen ◽  
Lei Zhang ◽  
Lei Li ◽  
Shuangzhu Kang ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Personalized Medicine ◽  
High Efficiency ◽  
Structural Characteristics ◽  
Manufacturing Technology ◽  
Vascular Stent ◽  
Additive Manufacturing Technology ◽  
Vascular Scaffolds ◽  
And Personalized Medicine

High-efficiency formation of personalized stent by additive manufacturing (3D printing) has gained deal of attention and research in interventional and personalized medicine. In this article, the structural characteristics of vascular scaffolds and the application and innovation of additive manufacturing technology in the process of angioplasty are reviewed. In the future, with the continuous maturity of additive manufacturing technology, it is expected to be an important part of interventional precision medicine to manufacture personalized vascular stent.

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