SASCOM Seminar Series - 3D printed composites: Current development and future trend

Recently, new 3D printers that can print continuous fiber composites have been commercially available. This presentation shows recent development of 3D printed composites and current trend of 3D printed composite products. This presentation includes research results in the laboratory of Tokyo Institute of Technology, Japan, such as evaluations of strength of 3D printed composites in various orientations, fiber twisting effect during printing, fiber placement optimizations, self-sensing of 3D printed composites, 3D printing simulation, novel snap-in joints, and novel concentric twin nozzle 3D printer developed in Tokyo Institute of Technology. The presentation will show the future trend of 3D printed composites.

An example of 3D printing simulation using MPS (moving particle semi-implicit) method

About the Speaker

Prof. Akira Todoroki has been a faculty (assistant, associate, full professor) at the Department of Mechanical Engineering, School of Engineering, Tokyo Institute of Technology, Japan, since 1988. He previously worked as a researcher in Nagoya Aircraft Work, Mitsubishi Heavy Industry, in 1986-1988. He also served as a visiting researcher in the University of Florida, USA (1995-1996). He was also invited to KAUST in 2013 to give a talk in CEMAM (Computational and Experimental Mechanics of Advanced Materials), an international workshop organized by Prof. Gilles Lubineau. He received his bachelor, master, and Ph.D. degrees from Tokyo Institute of Technology. He has been a fellow member of Japan Society of Composite Materials (JSCM), Japan Society of Materials Science (JSMS), and Japan Reinforced Plastics Society (JRPS). His research interests include 3D printed composites, self-sensing composites, and optimizations of composite structures.

He won prestigious awards since he started his academic career. In 1989, he won JSME Young Engineers Award from Japan Society of Mechanical Engineering. In 2000, he won the renowned “Hayashi Award” from Japan Society of Composite Materials, the highest recognition for the researchers working on composite materials in Japan. In the same year, he also won JSMS Young Engineers Award in 29th FRP Symposium. He also won awards from various institutions and societies, including Best Paper Award from High Pressure Institute of Japan (2021), JSCM Best Paper Awards (2007, 2011, 2014, 2021), JRPS Best Paper Awards (2004, 2005, 2012), JSMS Best Paper Awards (2005, 2006, 2007), Computational Mechanics Achievement Award from JSME (2006), Best Paper Award in the 8th Korea-Japan Joint Symposium on Composite Materials (2011), Award of Achievement (2010) and Best Paper Award (2019) from SAMPE Japan, Best Paper Award from American Society for Composites (2013), and Best Paper Award from JSASS (Japan Society for Aeronautical and Space Science).

By Prof. Akira Todoroki

  •  Professor Mechanical Engineering, Tokyo Institute of Technology (Japan)

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SASCOM Seminar Series - Carbon Nanostructures of Oil Fly Ash as Reinforcements for Different Polymers

Polymer nanocomposites are promising for application in various products. However, effective additives as mechanical reinforcements at a low cost are needed. From the other hand, oil fly ash, which is hugely available in Saudi Arabia and other countries might solve this issue. This material is produced as a biproduct due to the use of crude/heavy oil as a fuel in power and desalination plants. The majority of such fly ash consists of unburned carbon, which can make up 80-95 wt% of the ash. A considerable part of these carbons has graphitic structures. This oil fly ash in its nano and micro structures is found to be quite suitable for its use as a mechanical reinforcement. Among such structures, carbon nanotubes (CNTs) derived oil fly ash were found to have attractive structural and mechanical properties. These CNTs were evaluated as reinforcements for different thermoplastics like high-density polyethylene, polycarbonate, polypropylene, and polystyrene. Significant enhancement in the mechanical properties at a low weight fraction mainly the tensile strength, Young’s modulus, stiffness, and hardness, were observed. The other form of oil fly ash is nanoparticles, produced in our lab was evaluated for high-performance epoxy matrix system. The obtained results showed significant enhancement in the stiffness of the nanocomposite material by 60% over that of the pure epoxy matrix system. These results might be useful to recommend oil fly ash at its nano and micro structure for different polymers.


About the Speaker

Numan Salah is a Professor at the Center of Nanotechnology and a group leader at KAU (Carbon Nanostructures). He has a Ph.D. degree is in Physics and his research interest includes nanomaterials (synthesis, characterization, application) like carbon nanostructures, optical and thermoelectric nanomaterials produced by different techniques for different applications mainly Dosimetry, Energy, Water. Authored/co-authored > 145 research papers and has > 10 US patents. Teaching some courses in the Nuclear Engineering Dept. and supervision of research programs, Guiding PhD students and mentoring Post Doc Fellows.

By Dr. Numan Salah

  • Professor at the Center of Nanotechnology, KAU

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