Researcher of the Year 2018 - Professor T. Venkatesan. The advanced materials community would like to take this opportunity to pay rich tributes to Professor T. Venkatesan for his pioneering research and notable contributions to nanoscience and nanotechnology. Advanced Materials Letters have been selected his photo for the cover of this special year-end issue.
Maximum available tensile strength of carbon fibers
Masatoshi Shioya1*, Takashi Kajikawa1, Kuniaki Takahashi1, Yoshiki Sugimoto2
1School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1-S8-34 Ookayama, Meguro-ku, Tokyo 152-8552, Japan
2Structural Materials Research Institute, The National Institute of Advanced Industrial Science and Technology, 2266-98, Anagahora, Shimoshidami, Moriyama-ku, Nagoya, Aichi 463-8560, Japan
Adv. Mater. Lett., 2018, 9 (12), pp 885-888
Publication Date (Web): Sep 14, 2018
Copyright © 2019 VBRI Press
Development of carbon fibers from alternative precursory materials through new production processes is a recent topic of active research. In such a research, the maximum available tensile strength, i. e. the tensile strength which will be achieved after elaboration to suppress defect formation during production process, is the matter of great concern. We have developed a method for determining this strength through the tensile test on a single fiber after introducing an artificial notch. In the present paper, this method has been refined. By using the refined method, the distribution of the maximum available tensile strength at various radial positions has been measured for a polyacrylonitrile-based carbon fiber. The difference between the maximum available tensile strength and the strength predicted using other methods such as those based on the fracture toughness and the fiber-length dependence of the tensile strength has also been discussed.
Carbon fiber, tensile strength, defect, crack.