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Article: FDM technology and the effect of printing parameters on the tensile strength of ABS parts.

Daly, Mohamed / Tarfaoui, Mostapha / Chihi, Manel / Bouraoui, Chokri

The International journal, advanced manufacturing technology

2023 Volume 126, Issue 11-12, Page(s) 5307–5323

Abstract: The effect of printing speed on the tensile strength of acrylonitrile butadiene styrene (ABS) samples fabricated using the fused deposition modelling (FDM) process is addressed in this research. The mechanical performance of FDM-ABS products was ... ...

Abstract	The effect of printing speed on the tensile strength of acrylonitrile butadiene styrene (ABS) samples fabricated using the fused deposition modelling (FDM) process is addressed in this research. The mechanical performance of FDM-ABS products was evaluated using four different printing speeds (10, 30, 50, and 70 mm/s). A numerical model was developed to simulate the experimental campaign by coupling two computational codes, Abaqus and Digimat. In addition, this article attempts to investigate the impacts of printing parameters on ASTM D638 ABS specimens. A 3D thermomechanical model was implemented to simulate the printing process and evaluate the printed part quality by analysing residual stress, temperature gradient and warpage. Several parts printed in Digimat were analysed and compared numerically. The parametric study allowed us to quantify the effect of 3D printing parameters such as printing speed, printing direction, and the chosen discretisation (layer by layer or filament) on residual stresses, deflection, warpage, and resulting mechanical behaviour.
Language	English
Publishing date	2023-05-01
Publishing country	England
Document type	Journal Article
ZDB-ID	1476510-X
ISSN	1433-3015 ; 0268-3768
ISSN (online)	1433-3015
ISSN	0268-3768
DOI	10.1007/s00170-023-11486-y
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: COVID-19: Current challenges regarding medical healthcare supplies and their implications on the global additive manufacturing industry.

Goda, Ibrahim / Nachtane, Mourad / Qureshi, Yumna / Benyahia, Hamza / Tarfaoui, Mostapha

Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine

2022 Volume 236, Issue 5, Page(s) 613–627

Abstract: The covid-19 outbreak has caused a shortage of masks and other healthcare products for the general public around the globe. In addition, it has also affected the supply of personal protective equipment (PPE) used by healthcare services because of a ... ...

Abstract	The covid-19 outbreak has caused a shortage of masks and other healthcare products for the general public around the globe. In addition, it has also affected the supply of personal protective equipment (PPE) used by healthcare services because of a sudden increase in their demand. This significant disruption in the global supply chain of these products resulted in, leaving many staff and patients without protection. The additive manufacturing (AM) industry is going through extraordinary times and can provide emergency responses to help deal with the global crisis caused by the COVID-19 pandemic. The objective of the present work is therefore to perform an up-to-date review to determine the capacity of AM to provide exclusive benefits for the medical healthcare supplies sector to fight this current situation. In this review, it is found that AM technology has proved that it can be used as a volume manufacturing technology for the ongoing crisis. However, the standardization and certification are appeared to represent the main challenges for adopting the AM in healthcare against COVID-19. Furthermore, additively manufactured materials for medical applications must be developed for medical environments. Most printed medical products for COVID-19 require biocompatibility evaluation and shall prove their ability to sterilize. Finally, this review concluded that AM technology can fulfill the requirements of face masks and ventilator parts for healthcare systems for proper controlling and treating of COVID-19 patients when the safety and efficacy of these devices are ensured.
MeSH term(s)	COVID-19/epidemiology ; Delivery of Health Care ; Humans ; Manufacturing Industry ; Pandemics/prevention & control ; SARS-CoV-2
Language	English
Publishing date	2022-01-22
Publishing country	England
Document type	Journal Article ; Review
ZDB-ID	1065942-0
ISSN	2041-3033 ; 0046-2039 ; 0954-4119
ISSN (online)	2041-3033
ISSN	0046-2039 ; 0954-4119
DOI	10.1177/09544119211070373
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Article ; Online: Additive Manufacturing and Composite Materials for Marine Energy: Case of Tidal Turbine.

Rouway, Marwane / Tarfaoui, Mostapha / Chakhchaoui, Nabil / Omari, Lhaj El Hachemi / Fraija, Fouzia / Cherkaoui, Omar

3D printing and additive manufacturing

2023 Volume 10, Issue 6, Page(s) 1309–1319

Abstract: The global trend in additive manufacturing is the technology of three-dimensional (3D) printing with a high potential to avoid some of the weaknesses of conventional fabrication techniques. This new technology has been used to manufacture small tidal and ...

Abstract	The global trend in additive manufacturing is the technology of three-dimensional (3D) printing with a high potential to avoid some of the weaknesses of conventional fabrication techniques. This new technology has been used to manufacture small tidal and wind turbines. In isolated areas, small turbines can be manufactured and assembled on-site for green energy production. The purpose of this document is to evaluate the thermomechanical behavior of a printed tidal turbine using Digimat-AM (Additive Manufacturing) with fused filament fabrication method. The finite element computes the mechanical deflection, temperature, residual stresses, and warpage fields of the printed part. The composites used during printing are thermoplastic polymers (acrylonitrile butadiene styrene, polyamide 6 [PA6], polyamide 12 [PA12], and polyetherimide [PEI]) reinforced with carbon and glass fillers in the form of fibers and beads (CF/GF and CB/GB). Through the simulation, one could show that the blade printed with PEI-CB/CF has excellent mechanical performance of low mechanical deflection and warpage, compared to PA6-CB/CF. In addition, the fiber-shaped fillers are better than the bead-shaped ones for the 3D printing process. In general, this study has shown the potential and feasibility of 3D printing as an excellent opportunity in the fabrication of small blades in the future, but more studies are required to understand this potential.
Language	English
Publishing date	2023-12-11
Publishing country	United States
Document type	Journal Article
ISSN	2329-7670
ISSN (online)	2329-7670
DOI	10.1089/3dp.2021.0194
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: The Effect of Agglomeration on the Electrical and Mechanical Properties of Polymer Matrix Nanocomposites Reinforced with Carbon Nanotubes.

Tamayo-Vegas, Sebastian / Muhsan, Ali / Liu, Chang / Tarfaoui, Mostapha / Lafdi, Khalid

Polymers

2022 Volume 14, Issue 9

Abstract: In this work, we investigated the effect of carbon nanotubes addition and agglomeration formation on the mechanical and electrical properties of CNT-polymer-based nanocomposites. Six specimens with carbon nanotubes (CNTs) fractions of 0%, 0.5%, 1%, 2%, 4% ...

Abstract	In this work, we investigated the effect of carbon nanotubes addition and agglomeration formation on the mechanical and electrical properties of CNT-polymer-based nanocomposites. Six specimens with carbon nanotubes (CNTs) fractions of 0%, 0.5%, 1%, 2%, 4% and 5% were manufactured and characterized by dynamic mechanical analysis (DMA) and four-probe method. The stress-strain curves and electrical conductivity properties were obtained. Scanning electron microscopy (SEM) was used to characterize both agglomeration and porosity formation. By employing micromechanics, through representative volume element (RVE), finite element analysis (FEA) and resistor network model (RNM), the Young's modulus and electrical conductivity values were calculated. The samples' elastic moduli showed an increment, reaching the maximum value at a CNTs fraction of 2%, thereafter an adverse effect was caused in the high CNT percentage samples. The final electrical conductivity seemed greatly altered with the addition of CNTs, reaching the percolation threshold at 2%. The unavoidable formation of CNT agglomerates appeared to influence the final physical properties. The CNT agglomerates adversely affect the mechanical performance of high-CNT-percentage samples. Conversely, an exponential increment in the electrical conductivity was presented as the agglomerates formed networks allowing the transport of electrons through the tunnelling effect. These phenomena were experimentally and numerically confirmed, showing a good correlation.
Language	English
Publishing date	2022-04-29
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2527146-5
ISSN	2073-4360 ; 2073-4360
ISSN (online)	2073-4360
ISSN	2073-4360
DOI	10.3390/polym14091842
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Graphene nanofillers as a player to improve the dynamic compressive response and failure behavior of carbon/epoxy composite.

Chihi, M / Tarfaoui, M / Qureshi, Y / Benyahia, H / Bouraoui, C

Nanotechnology

2020 Volume 31, Issue 42, Page(s) 425709

Abstract: Vast research has been going on to improve the mechanical performance of carbon fiber reinforced polymers composite (CFRP) when subjected to quasi-static loading but investigation and modification of their dynamic behavior are still underdeveloped. This ... ...

Abstract	Vast research has been going on to improve the mechanical performance of carbon fiber reinforced polymers composite (CFRP) when subjected to quasi-static loading but investigation and modification of their dynamic behavior are still underdeveloped. This paper presents an experimental investigation on the effect of randomly dispersed graphene nanoplatelets (GNPs) on the mechanical properties of CFRP composites under dynamic loading. Four different mass fractions of GNPs, 0%, 0.5%, 1%, and 2%, were considered in the experiments. Specimens were tested experimentally using the split Hopkinson pressure bar device (SHPB) to examine their dynamic response and damage behavior at high strain rates. During the dynamic compression tests, a high-speed camera was used to monitor and record the damage kinetics. The experimental characterization showed that the integration of GNPs has greatly influenced the dynamic response and damage mechanism of the CFRP. Composite doped with 1% GNPs demonstrates the optimum enhancement of the mechanical properties of the composite specimens and shows an increase of the dynamic characteristics and fracture resistance.
Language	English
Publishing date	2020-07-01
Publishing country	England
Document type	Journal Article
ZDB-ID	1362365-5
ISSN	1361-6528 ; 0957-4484
ISSN (online)	1361-6528
ISSN	0957-4484
DOI	10.1088/1361-6528/aba1bb
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Additive manufacturing in fighting against novel coronavirus COVID-19.

Tarfaoui, M / Nachtane, M / Goda, I / Qureshi, Y / Benyahia, H

The International journal, advanced manufacturing technology

2020 Volume 110, Issue 11-12, Page(s) 2913–2927

Abstract: Nowadays, COVID-19 also known as novel coronavirus has become a global pandemic by causing severe respiratory tract infections in humans without any definite treatment or vaccine. Therefore, disease control measures include slowing down or averting the ... ...

Abstract	Nowadays, COVID-19 also known as novel coronavirus has become a global pandemic by causing severe respiratory tract infections in humans without any definite treatment or vaccine. Therefore, disease control measures include slowing down or averting the transfer of this viral infection from person to person. Continuous efforts are carried out to avoid the transmission of this disease to frontline healthcare personnel using single-use personal protective equipment (PPE). However, a critical shortage in this equipment around the world is becoming an alarming concern. Therefore, it is vital to present a possible alternative to overcome the acute shortage of protective gear such as face masks against this infectious disease which can have universal accessibility and is easily available. Additive manufacturing (AM), also known as 3D printing, is a possible solution to overcome the shortage of protective gear and can play a vital role in supporting their conventional production supplies during this global pandemic situation. In this context, this paper provides a brief background study of COVID-19, its conventional preventive measure, and a detailed overview regarding the latest AM efforts including designers' providers and makers in the 3D printing community. Moreover, numerous inquiries and questions such as technical factors, testing recommendations and characterization methods and biological concerns such as biocompatibility and sterilization for the AM manufactured medical devices are addressed in this paper. In the end, two examples of AM medical devices, i.e., face mask and Ambu bag ventilator, are presented and studied through numerical simulations.
Keywords	covid19
Language	English
Publishing date	2020-09-17
Publishing country	England
Document type	Journal Article
ZDB-ID	1476510-X
ISSN	1433-3015 ; 0268-3768
ISSN (online)	1433-3015
ISSN	0268-3768
DOI	10.1007/s00170-020-06077-0
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Effect of CNTs Additives on the Energy Balance of Carbon/Epoxy Nanocomposites during Dynamic Compression Test.

Chihi, Manel / Tarfaoui, Mostapha / Bouraoui, Chokri / El Moumen, Ahmed

Polymers

2020 Volume 12, Issue 1

Abstract: Previous research has shown that nanocomposites show not only enhancements in mechanical properties (stiffness, fracture toughness) but also possess remarkable energy absorption characteristics. However, the potential of carbon nanotubes (CNTs) as ... ...

Abstract	Previous research has shown that nanocomposites show not only enhancements in mechanical properties (stiffness, fracture toughness) but also possess remarkable energy absorption characteristics. However, the potential of carbon nanotubes (CNTs) as nanofiller in reinforced epoxy composites like glass fiber-reinforced polymers (GFRP) or carbon fiber-reinforced polymers (CFRP) under dynamic testing is still underdeveloped. The goal of this study is to investigate the effect of integrating nanofillers such as CNTs into the epoxy matrix of carbon fiber reinforced polymer composites (CFRP) on their dynamic energy absorption potential under impact. An out-of-plane compressive test at high strain rates was performed using a Split Hopkinson Pressure Bar (SHPB), and the results were analyzed to study the effect of changing the concentration of CNTs on the energy absorption properties of the nanocomposites. A strong correlation between strain rates and CNT mass fractions was found out, showing that an increase in percentage of CNTs could enhance the dynamic properties and energy absorption capabilities of fiber-reinforced composites.
Language	English
Publishing date	2020-01-11
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2527146-5
ISSN	2073-4360 ; 2073-4360
ISSN (online)	2073-4360
ISSN	2073-4360
DOI	10.3390/polym12010194
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: 3D Printing to Support the Shortage in Personal Protective Equipment Caused by COVID-19 Pandemic.

Tarfaoui, Mostapha / Nachtane, Mourad / Goda, Ibrahim / Qureshi, Yumna / Benyahia, Hamza

Materials (Basel, Switzerland)

2020 Volume 13, Issue 15

Abstract: Currently, the emergence of a novel human coronavirus disease, named COVID-19, has become a great global public health concern causing severe respiratory tract infections in humans. Yet, there is no specific vaccine or treatment for this COVID-19 where ... ...

Abstract	Currently, the emergence of a novel human coronavirus disease, named COVID-19, has become a great global public health concern causing severe respiratory tract infections in humans. Yet, there is no specific vaccine or treatment for this COVID-19 where anti-disease measures rely on preventing or slowing the transmission of infection from one person to another. In particularly, there is a growing effort to prevent or reduce transmission to frontline healthcare professionals. However, it is becoming an increasingly international concern respecting the shortage in the supply chain of critical single-use personal protective equipment (PPE). To that scope, we aim in the present work to provide a comprehensive overview of the latest 3D printing efforts against COVID-19, including professional additive manufacturing (AM) providers, makers and designers in the 3D printing community. Through this review paper, the response to several questions and inquiries regarding the following issues are addressed: technical factors connected with AM processes; recommendations for testing and characterizing medical devices that additively manufactured; AM materials that can be used for medical devices; biological concerns of final 3D printed medical parts, comprising biocompatibility, cleaning and sterility; and limitations of AM technology.
Keywords	covid19
Language	English
Publishing date	2020-07-27
Publishing country	Switzerland
Document type	Journal Article ; Review
ZDB-ID	2487261-1
ISSN	1996-1944
ISSN	1996-1944
DOI	10.3390/ma13153339
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: A review on the technologies, design considerations and numerical models of tidal current turbines

Nachtane, M / Tarfaoui, M / Goda, I / Rouway, M

Renewable energy. 2020 Apr. 29,

2020

Abstract: Tidal current turbine is one of the innovative and emerging technologies of marine renewable energies because it offers constant and predictable energy source that can be very beneficial, especially for commercial scale production of electrical power. ... ...

Abstract	Tidal current turbine is one of the innovative and emerging technologies of marine renewable energies because it offers constant and predictable energy source that can be very beneficial, especially for commercial scale production of electrical power. Hydrofoils (HF) are essential elements of tidal current turbine (TCT) and should be properly designed as they play a vital role in improving the turbine output and providing adequate resistance to the blade structure. In connection with the hydrofoil designs, it is noteworthy that the primary objectives in their designs are to increase the coefficient of lift and to reduce the coefficients of drag and pitching moment, thus delaying the cavitation phenomenon. In this paper, the technology developments of the hydrofoil designs used in the horizontal axis TCT industry are reviewed, including the hydrodynamics design and the mechanical structure design. Besides, an up-to-date review and the newest achievements of marine TCT technologies with their developing histories are further explored. Included are also reviews on the numerical models used to assess the performance of TCT and optimization methods applied to design the hydrofoils. This in turn significantly contributes to a better knowledge on the recent designs of TCT hydrofoils for the researchers working in the marine turbine energy domain. Such information could also have important implications in the design of more sophisticated hydrofoils for the exploitation in diverse tidal current energy technologies for reaching a sustainable future.
Keywords	electric power ; energy ; hydrodynamics ; mathematical models ; system optimization ; tides ; turbines ; water power
Language	English
Dates of publication	2020-0429
Publishing place	Elsevier Ltd
Document type	Article
Note	Pre-press version
ZDB-ID	2001449-1
ISSN	0960-1481
ISSN	0960-1481
DOI	10.1016/j.renene.2020.04.155
Database	NAL-Catalogue (AGRICOLA)

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Article: Self-heating and deicing epoxy/glass fiber based carbon nanotubes buckypaper composite

Tarfaoui, M / A. El Moumen / M. Boehle / O. Shah / K. Lafdi

Journal of materials science. 2019 Jan., v. 54, no. 2

2019

Abstract: The recent developments in the aeronautical structure industry have seen a sharp rise in the use of polymer composite materials. The performances of all aerodynamic surfaces are heavily dependent on the shape and the surface form. The modification of ... ...

Abstract	The recent developments in the aeronautical structure industry have seen a sharp rise in the use of polymer composite materials. The performances of all aerodynamic surfaces are heavily dependent on the shape and the surface form. The modification of these surfaces due to condensation and melting of ice can cause catastrophic decreases in the aerodynamic performance. In this study polymer composite materials as heater were made and studied. The feasibility of using advanced polymer composites for de-icing application was validated and studied through experiments. It consists of thin carbon nanotubes (CNTs) Bucky paper placed between two glass fibers veils and then infiltrated with an epoxy polymer resin and cured. The composite can be heated up very quickly using an electrical power source. The idea of using this new material as a heater and de-icing material was explored experimentally. For that purpose, the temperature distribution was monitored at different positions of the panel using thermal imaging. Experimental results show that the surface temperature of the panel increases gradually as the heating time increases. This temperature increased in a short time period of heating time, implying that the composite panels with CNTs Bucky paper display an excellent heating performance.
Keywords	carbon nanotubes ; composite materials ; electric power ; epoxides ; glass fibers ; ice ; industry ; melting ; paper ; polymers ; surface temperature ; thermography
Language	English
Dates of publication	2019-01
Size	p. 1351-1362.
Publishing place	Springer US
Document type	Article
ZDB-ID	2015305-3
ISSN	1573-4803 ; 0022-2461
ISSN (online)	1573-4803
ISSN	0022-2461
DOI	10.1007/s10853-018-2917-9
Database	NAL-Catalogue (AGRICOLA)

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