scholarly journals Investigation of the Anisotropic Characteristics of Layered Rocks under Uniaxial Compression Based on the 3D Printing Technology and the Combined Finite-Discrete Element Method

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Fan He ◽  
Quansheng Liu ◽  
Penghai Deng
Keyword(s):  
3D Printing ◽  
Discrete Element Method ◽  
Numerical Models ◽  
Discrete Element ◽  
Printing Technology ◽  
3D Printing Technology ◽  
Transverse Isotropic ◽  
3D Printed ◽  
Inclined Angle ◽  
Element Method

The excavation in layered rocks is an issue for a number of geoengineering applications; these kinds of rocks all exhibit transverse isotropic features due to the process of metamorphic differentiation. This paper focuses on providing two methods, i.e., the 3D printing technology and the combined finite-discrete element method, to simulate the anisotropic characteristics of layered rocks. The results showed that both the 3D-printed samples and the FDEM numerical models are considered as a good match, and both revealed that as the inclined angle increased, the UCS of the sample first decreased and then increased, showing a U-shaped pattern. The results of this paper served as a reference to the promotion of the 3D printing technology and the combined finite-discrete element method in the geotechnical engineering field and laboratory test research.

scholarly journals A millifluidic chip for cultivation of fish embryos and toxicity testing fabricated by 3D printing technology

RSC Advances ◽  
2021 ◽  
Vol 11 (33) ◽  
pp. 20507-20518
Author(s):  
Petr Panuška ◽  
Zuzana Nejedlá ◽  
Jiří Smejkal ◽  
Petr Aubrecht ◽  
Michaela Liegertová ◽  
...  
Keyword(s):  
3D Printing ◽  
Toxicity Testing ◽  
Toxicity Screening ◽  
Printing Technology ◽  
3D Printing Technology ◽  
Fish Embryos ◽  
3D Printed ◽  
Novel Design

A novel design of 3D printed zebrafish millifluidic system for embryonic long-term cultivation and toxicity screening has been developed. The chip unit provides 24 cultivation chambers and a selective individual embryo removal functionality.

scholarly journals 3D-Printed Nanocellulose-Based Cushioning–Antibacterial Dual-Function Food Packaging Aerogel

Molecules ◽  
2021 ◽  
Vol 26 (12) ◽  
pp. 3543
Author(s):  
Wei Zhou ◽  
Jiawei Fang ◽  
Shuwei Tang ◽  
Zhengguo Wu ◽  
Xiaoying Wang
Keyword(s):  
3D Printing ◽  
Food Packaging ◽  
Fruits And Vegetables ◽  
Antibacterial Effect ◽  
Dual Function ◽  
Printing Technology ◽  
E Coli ◽  
3D Printing Technology ◽  
The Core ◽  
3D Printed

Cushioning and antibacterial packaging are the requirements of the storage and transportation of fruits and vegetables, which are essential for reducing the irreversible quality loss during the process. Herein, the composite of carboxymethyl nanocellulose, glycerin, and acrylamide derivatives acted as the shell and chitosan/AgNPs were immobilized in the core by using coaxial 3D-printing technology. Thus, the 3D-printed cushioning–antibacterial dual-function packaging aerogel with a shell–core structure (CNGA/C–AgNPs) was obtained. The CNGA/C–AgNPs packaging aerogel had good cushioning and resilience performance, and the average compression resilience rate was more than 90%. Although AgNPs was slowly released, CNGA/C–AgNPs packaging aerogel had an obvious antibacterial effect on E. coli and S. aureus. Moreover, the CNGA/C–AgNPs packaging aerogel was biodegradable. Due to the customization capabilities of 3D-printing technology, the prepared packaging aerogel can be adapted to more application scenarios by accurately designing and regulating the microstructure of aerogels, which provides a new idea for the development of food intelligent packaging.

APPLICATION OF 3D PRINTING TECHNOLOGY FOR RAPID TOOLING IN SHEET METAL FORMING

2020 ◽  
Vol 3 ◽  
pp. 20-30
Author(s):  
M.A. SEREZHKIN ◽  
D.O. KLIMYUK ◽  
A.I. PLOKHIKH
Keyword(s):  
3D Printing ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Rapid Tooling ◽  
Printing Technology ◽  
3D Printing Technology ◽  
3D Printed ◽  
Printed Materials ◽  
Printing Parameters

The article presents the study of the application of 3D printing technology for rapid tooling in sheet metal forming for custom or small–lot manufacturing. The main issue of the usage of 3D printing technology for die tooling was discovered. It is proposed to use the method of mathematical modelling to investigate how the printing parameters affect the compressive strength of FDM 3D–printed parts. Using expert research methods, the printing parameters most strongly affecting the strength of products were identified for further experiments. A method for testing the strength of 3D–printed materials has been developed and tested.

scholarly journals Numerical Modeling of a Punch Penetration Test Using the Discrete Element Method

2020 ◽  
Vol 28 (2) ◽  
pp. 1-7
Author(s):  
Rouhollah Basirat ◽  
Jafar Khademi Hamidi
Keyword(s):  
Numerical Modeling ◽  
Discrete Element Method ◽  
Numerical Models ◽  
Confining Pressure ◽  
Discrete Element ◽  
Numerical Results ◽  
Strength Parameter ◽  
Penetration Test ◽  
Strength Parameters ◽  
Element Method

AbstractUnderstanding the brittleness of rock has a crucial importance in rock engineering applications such as the mechanical excavation of rock. In this study, numerical modeling of a punch penetration test is performed using the Discrete Element Method (DEM). The Peak Strength Index (PSI) as a function of the brittleness index was calculated using the axial load and a penetration graph obtained from numerical models. In the first step, the numerical model was verified by experimental results. The results obtained from the numerical modeling showed a good agreement with those obtained from the experimental tests. The propagation path was also simulated using Voronoi meshing. The fracture was created under the indenter in the first step, and then radial fractures were propagated. The effects of confining pressure and strength parameters on the PSI were subsequently investigated. The numerical results showed that the PSI increases with enhancing the confining pressure and the strength parameter of the rock, including cohesion and the friction angle. A new relationship between the strength parameters and PSI was also introduced based on two variable regressions of the numerical results.

scholarly journals Implementation of 3D Printing Technology in the Food Industry

2021 ◽  
pp. 50-54
Author(s):  
Nor Aiman Sukindar ◽  
Noorazizi Mohd Samsuddin ◽  
Sharifah Imihezri Bt. Syed Shaharuddin ◽  
Shafie Kamaruddin ◽  
Ahmad Zahirani Ahmad Azhar ◽  
...  
Keyword(s):  
3D Printing ◽  
New Product Development ◽  
Food Industry ◽  
Printing Technology ◽  
3D Printing Technology ◽  
Fabrication Cost ◽  
Food Packages ◽  
3D Printed ◽  
The Cost ◽  
Fabrication Time

This project involves the implementation of 3D printing technology on designing and fabricating food holders in the food industry. Food holders are designed to hold the food packages in the filling line for food manufacturing industries that apply retort technology. Therefore, this study aims to implement the 3D printing technology in particular FDM to fabricate food holders for the food processing industry. The approach of using this technology is focused on giving more view on the capability of 3D printing technology, aiming at reducing the overall process fabrication cost and fabrication time. Hence, the fabrication cost and time between FDM and conventional machining methods were compared. This study revealed that Organic Gain food industry was able to reduce the cost and fabrication time for the food holder up to approximately 96.3% and 72% respectively. This project gives an insight into the ability of 3D printing technology in delivering the demands of the industry in producing parts as well as the adaptability of the technology to the industry in new product development. The project was carried out successfully and the 3D printed food holder has been tested and functions smoothly.

scholarly journals Promising Applications of Additive-Manufactured (3D-printed) Electrochemical Sensors for Forensic Chemistry

2021 ◽  
Author(s):  
Sílvia Castro ◽  
Raquel Rocha ◽  
Afonso João ◽  
Eduardo Richter ◽  
Rodrigo Munoz
Keyword(s):  
3D Printing ◽  
Illicit Drugs ◽  
Industrial Revolution ◽  
Electrochemical Sensors ◽  
Forensic Chemistry ◽  
Recent Contribution ◽  
Printing Technology ◽  
3D Printing Technology ◽  
Wide Range ◽  
3D Printed

Additive-manufacturing is one of the major pillars of the new industrial revolution and the three-dimensional (3D) printing technology has been highlighted in this scenario. Among the many areas benefited by 3D-printing, the development of electrochemical sensors has appeared in evidence in the last years. One potential application of 3D-printed electrochemical sensors is devoted to forensic chemistry, which demands for portable analytical methods that can provide on-site measurements and thus bring a relevant information in loco. In this context, this review highlights the recent contribution of 3D-printing technology on the development of electrochemical sensors with great promises for on-site analysis in “real-world” forensic scenarios. From the detection of trace explosives, gunshot residues, illicit drugs and chemical threats, to the measurement of adulterants in food and fuels, we show the wide range of applications that 3D-printed electrochemical sensors have been proposed and future demands that can be addressed by such a powerful, affordable, and accessible tool.

3D Printing Technology in Drug Delivery: Recent Progress and Application

2019 ◽  
Vol 24 (42) ◽  
pp. 5039-5048 ◽  
Author(s):  
Sabna Kotta ◽  
Anroop Nair ◽  
Nimer Alsabeelah
Keyword(s):  
Drug Delivery ◽  
3D Printing ◽  
Drug Delivery Systems ◽  
Delivery Systems ◽  
Pharmaceutical Manufacturing ◽  
Layer By Layer ◽  
Printing Technology ◽  
Drug Dosing ◽  
3D Printing Technology ◽  
3D Printed

Background: 3D printing technology is a new chapter in pharmaceutical manufacturing and has gained vast interest in the recent past as it offers significant advantages over traditional pharmaceutical processes. Advances in technologies can lead to the design of suitable 3D printing device capable of producing formulations with intended drug release. Methods: This review summarizes the applications of 3D printing technology in various drug delivery systems. The applications are well arranged in different sections like uses in personalized drug dosing, complex drugrelease profiles, personalized topical treatment devices, novel dosage forms and drug delivery devices and 3D printed polypills. Results: This niche technology seems to be a transformative tool with more flexibility in pharmaceutical manufacturing. Typically, 3D printing is a layer-by-layer process having the ability to fabricate 3D formulations by depositing the product components by digital control. This additive manufacturing process can provide tailored and individualized dosing for treatment of patients different backgrounds with varied customs and metabolism pattern. In addition, this printing technology has the capacity for dispensing low volumes with accuracy along with accurate spatial control for customized drug delivery. After the FDA approval of first 3D printed tablet Spritam, the 3D printing technology is extensively explored in the arena of drug delivery. Conclusion: There is enormous scope for this promising technology in designing various delivery systems and provides customized patient-compatible formulations with polypills. The future of this technology will rely on its prospective to provide 3D printing systems capable of manufacturing personalized doses. In nutshell, the 3D approach is likely to revolutionize drug delivery systems to a new level, though need time to evolve.

scholarly journals Calculating the activation energies of nickel, manufactured using 3D printing technology, with multichannel hydrogen diffusion model

2019 ◽  
Vol 121 ◽  
pp. 04017
Author(s):  
Petr Zumberov ◽  
Sergey Kolesov ◽  
Vladimir Polyansky ◽  
Evgeniy Varshavchik
Keyword(s):  
3D Printing ◽  
Hydrogen Diffusion ◽  
Mathematic Model ◽  
Activation Energies ◽  
Modern World ◽  
Printing Technology ◽  
High Entropy ◽  
3D Printing Technology ◽  
3D Printed ◽  
Vacuum Heating

In modern world more and more materials with extreme properties are being used: high alloys, high-entropy alloys, nanostructured materials, etc. The extreme properties of these materials make them especially sensitive to hydrogen diffusion. Hydrogen can severely impair their properties and cause failures in structures and machines the material is used in. Nowadays, when structures and components are becoming increasingly complex, the use of 3D printing technology is becoming more widespread. Components made using 3D printing technologies are usually layered, which increase the amount of hydrogen that can diffuse into the material. The amount of hydrogen concentration in 3D printed nickel samples has been determined using vacuum heating method in hydrogen analyzer AV-1. The samples were held at different constant temperatures and the total amount of hydrogen extracted at those temperatures was calculated. A mathematic model was developed to evaluate the amount of hydrogen extracted at a given temperature. The evaluation was then compared to the experiment results, and the validity of the mathematical model and the selected hydrogen activation energies was verified.

scholarly journals 3D-Printed Biopolymers for Tissue Engineering Application

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Xiaoming Li ◽  
Rongrong Cui ◽  
Lianwen Sun ◽  
Katerina E. Aifantis ◽  
Yubo Fan ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
3D Printing ◽  
Three Dimensional ◽  
Engineering Application ◽  
Tissue Engineering Application ◽  
Printing Technology ◽  
3D Printing Technology ◽  
Potential Applications ◽  
3D Printed ◽  
Dimensional Object

3D printing technology has recently gained substantial interest for potential applications in tissue engineering due to the ability of making a three-dimensional object of virtually any shape from a digital model. 3D-printed biopolymers, which combine the 3D printing technology and biopolymers, have shown great potential in tissue engineering applications and are receiving significant attention, which has resulted in the development of numerous research programs regarding the material systems which are available for 3D printing. This review focuses on recent advances in the development of biopolymer materials, including natural biopolymer-based materials and synthetic biopolymer-based materials prepared using 3D printing technology, and some future challenges and applications of this technology are discussed.

scholarly journals The Application of 3D Printing Technology in the Classification and Preoperative Planning of Complex Tibial Plateau Fractures

2020 ◽  
Author(s):  
Fuyang Chen ◽  
Chenyu Huang ◽  
Chen Ling ◽  
Jinming Zhou ◽  
Yufeng Wang ◽  
...  
Keyword(s):  
3D Printing ◽  
Tibial Plateau ◽  
3D Model ◽  
Preoperative Planning ◽  
Tibial Plateau Fracture ◽  
Tibial Plateau Fractures ◽  
Printing Technology ◽  
3D Printing Technology ◽  
Plateau Fracture ◽  
3D Printed

Abstract Background: Tibial plateau fracture is one of the common intra-articular fractures in clinic. And its accurate classification and treatment is a difficult problem for orthopedic surgeons. Our research aims to investigate the application value of 3D printing in the classification and preoperative planning of complex tibial plateau fractures.Methods: 28 cases of complex tibial plateau fractures diagnosed and treated in our hospital from January, 2017 to January, 2019.01 were analyzed. Preoperative spiral CT scan was performed and then DICOM data were input into the computer. We use Mimics to process data. And 3D printing technology was applied to print the 3D model of fracture (1:1). Combined with the 3D printed model, the tibial plateau fractures were subdivided into seven types according to the geometric plane of the tibial plateau. The surgical approach was determined on the 3D printed model. And then simulated operations such as accurate reduction of fracture and selection of plate placement were performed.Results: The reconstructed 3D model of tibial plateau fracture can accurately reflect the direction of fracture displacement and the degree of plateau collapse. Also, it and can help with the preoperative surgical design of tibial plateau fracture. The intraoperative fracture details were basically the same as the 3D printed model. And the fracture surface of the tibial plateau was well improved in all 28 cases.Conclusion: 3D printing technology can be used to guide the classification and preoperative planning of complex tibial plateau fractures.

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