Jun Takahashi

ORCID: 0000-0002-3176-6338
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Research Areas
  • Mechanical Behavior of Composites
  • Fiber-reinforced polymer composites
  • Composite Material Mechanics
  • Structural Behavior of Reinforced Concrete
  • Fatigue and fracture mechanics
  • High-Velocity Impact and Material Behavior
  • Natural Fiber Reinforced Composites
  • Smart Materials for Construction
  • Epoxy Resin Curing Processes
  • Concrete Corrosion and Durability
  • Advanced Fiber Optic Sensors
  • Infrastructure Maintenance and Monitoring
  • Mechanical Engineering and Vibrations Research
  • Recycling and Waste Management Techniques
  • Additive Manufacturing and 3D Printing Technologies
  • Metal Forming Simulation Techniques
  • Structural Health Monitoring Techniques
  • Advanced ceramic materials synthesis
  • Advanced MEMS and NEMS Technologies
  • Material Properties and Applications
  • Metallurgy and Material Forming
  • Advanced materials and composites
  • Engineering Applied Research
  • Numerical methods in engineering
  • Aluminum Alloys Composites Properties

The University of Tokyo
2015-2024

Ihara Chemical Industry (Japan)
2013-2024

Tohoku University
1994-2023

National Institute of Technology, Toyota College
2020

Toyama Prefectural University
2020

National Institute of Technology, Akashi College
2020

Ritsumeikan University
2020

Denka (Japan)
2006-2020

University of Electro-Communications
2018

Hitachi (Japan)
2017

The recent status of Japan's government-driven project to establish carbon fiber reinforced thermoplastic composites (CFRTP) technology for automotive applications conducted in the National Composites Center (NCC) Japan is introduced first. baseline discontinuous (C-LFT-D: – long thermoplastic-direct) using press compaction. All components target car chassis made aluminum alloy are replaced by C-LFT-D and a 10% weight reduction with same rigidity has been verified. basic physics length...

10.1016/j.compscitech.2017.09.015 article EN cc-by-nc-nd Composites Science and Technology 2017-09-18

The application of carbon fiber-reinforced thermoplastics (CFRTPs) for automotive mass production is attracting increasing attention from researchers and engineers in related fields. This article presents recent developments CFRTPs focusing on the systematic development lightweight CFRTP applications production. Additionally, a national project Japan conducted at University Tokyo also introduced. basic demands, specific requirements production, current status scientific outputs are...

10.3390/jcs5030086 article EN Journal of Composites Science 2021-03-22

Abstract Poly(lactic acid) (PLA) biocomposites are usually plasticized to overcome the problem of poor ductility, which decreases valuable tensile strength. In this study, novel nanofibrillated cellulose (NFC) was extracted enhance acetyl tributyl citrate (ATBC) PLA biocomposites. Interestingly, NFC not only exhibited an excellent strengthening effect but also showed a further toughening in When 4 wt% added, strength, elongation at break, and impact strength with 15 ATBC 20 reached 52.6 MPa,...

10.1515/ntrev-2022-0142 article EN cc-by Nanotechnology Reviews 2022-01-01

A novel three-dimensional (3D) printed hybrid continuous fiber reinforced bi-matrix composite is proposed in this paper to improve the flexural fracture energy and designability of mechanical properties, combining excellent wettability thermosetting resin distinct fibers wonderful extrusion forming ability thermoplastic for nozzle based additive manufacturing (AM). Numerical simulations are conducted by finite element (FE) peridynamics (PD) models, enabling an in-depth study influence...

10.1016/j.jmrt.2024.05.241 article EN cc-by-nc-nd Journal of Materials Research and Technology 2024-05-01

A wind turbine comprises multiple components constructed from diverse materials. This complexity introduces challenges in designing the blade structure. In this study, we developed a structural optimization framework for Vertical Axis Wind Turbines (VAWT). integrates parametric Finite Element Analysis (FEA) model, which simulates structure's global behavior, with Genetic Algorithm (GA) technique that navigates design domain to identify optimal parameters. The goal is minimize mass of VAWT...

10.1016/j.heliyon.2024.e33185 article EN cc-by-nc-nd Heliyon 2024-06-01

Ultra-thin chopped carbon fiber tape-reinforced thermoplastics, which belong to a class of randomly oriented strands and are characterized by enhanced strength, stiffness, formability properties, have been prepared via paper-making method from ultra-thin thermoplastic prepregs. The failure thermoplastics under static tensile loading was studied in detail using various observation techniques, such as high-speed camera imaging, thermography, optical microscopy. obtained results revealed that...

10.1177/0731684416651134 article EN Journal of Reinforced Plastics and Composites 2016-05-26

Market demand for carbon fiber (CF) increases annually. Therefore, owing to the growing amount of fiber-reinforced plastic (CFRP) waste, CFRP manufacturers are attempting develop and design materials products by paying greater attention ecological economic factors. In this report, recycled CF (rCF) varieties with differing mechanical properties mixed determine possibility rCF application in future structural materials. 1, 3, 5, 8 10 MPa investigated proper compression molding pressure. The...

10.1080/09243046.2017.1334274 article EN Advanced Composite Materials 2017-08-08

A continuous fiber reinforced two-matrix composites with multi-cavity structure was fabricated by a co-extrusion method, combining the excellent wettability of thermosetting resin to and wonderful extrusion forming ability thermoplastic for nozzle based additive manufacturing (AM). Diversified component materials were utilized enrich database AM composites, including carbon (CCF), basalt (CBF), short polyamide (SFRPA), (PA), polylactic acid (PLA) epoxy resin. The tensile flexural tests...

10.1016/j.jmrt.2023.08.132 article EN cc-by Journal of Materials Research and Technology 2023-08-22

This paper describes a Jacobian approach to fast adaptation of acoustic models noisy environments. Acoustic under noise assumption are compensated by matrices with the difference between assumed and observed cepstra. Detailed mathematical formulation algorithm derivation presented. Experiments showed that when small amount training data is given, this outperforms existing approaches (such as PMC NOVO) for composing model from speech models. It drastically reduces computational cost replacing...

10.1109/icassp.1997.596063 article EN IEEE International Conference on Acoustics Speech and Signal Processing 2002-11-22

Journal Article Production and Consumption of Biotin by the Intestinal Microflora Cultured Freshwater Fishes Get access Haruo Sugita, Sugita Department Fisheries, Nihon University, Shimouma, Setagaya-ku, Tokyo 154, Japan To whom correspondence should be addressed. Search for other works this author on: Oxford Academic Google Scholar Jun Takahashi, Takahashi Yoshiaki Deguchi Bioscience, Biotechnology, Biochemistry, Volume 56, Issue 10, 1 January 1992, Pages 1678–1679,...

10.1271/bbb.56.1678 article EN Bioscience Biotechnology and Biochemistry 1992-01-01
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