著者

黄木 景二 井上 宏樹 白石 哲郎 藤村 雅博

出版者

学校法人 金沢工業大学 材料システム研究所

雑誌

材料システム (ISSN:02866013)

巻号頁・発行日

vol.25, pp.19-28, 2007 (Released:2021-02-17)

参考文献数

11

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This paper presents temperature dependence of electric resistance and Joule heat properties in carbon fiber reinforced polyethersulphone (PES) resin composites. The composite specimens were fabricated using recycled CFRP pieces or carbon fibers mixed with PES resin through an injection molding method. First, resistivitytemperature curves of the composites specimens were measured during heat cycles. Next, temperature rise due to Joule heat was measured and plotted against input power. Finally, resistivity of carbon fiber was measured for temperatures up to 473 K. It is found that resistivity of the composites obeys the percolation power law and shows the negative temperature coefficient (NTC) in the temperature range lower than load-deflection temperature of the resin. This NTC is proved to be mainly due to the NTC of carbon fiber. Resistivity at room temperature is reduced after each heat cycle. Temperature rise due to Joule heat is approximately proportional to input power per unit volume.

著者

松田 伸也 黄木 景二

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集A編 (ISSN:18848338)

巻号頁・発行日

vol.78, no.790, pp.912-922, 2012 (Released:2012-06-25)

参考文献数

28

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This paper presents a probabilistic model for predicting the constant fatigue life (CFL) diagrams for ceramics. First, a unified probabilistic delayed-fracture (PDF) model was proposed on the basis of the slow crack growth (SCG) concept in conjunction with the two-parameter Weibull distribution. Second, probabilistic CFL diagrams for effective volume Veff, effective loading time teffNf, fracture probability F and stress ratio R were obtained using the PDF model. The probabilistic CFL diagram was then related with the modified Goodman's diagram. Third, the unified strength parameters associated with the PDF model were determined using the experiment data of Si3N4 subjected to rotating bending. The stress amplitude - the number of cycles to failure curves were then predicted for R=-1 and 0 and various values of F. Moreover, the probabilistic CFL diagrams for various values of Veff and teffNf at F were depicted using the unified strength parameters. The validity of the present model was confirmed through the comparison of the predicted CFL diagrams with the experiment data.

著者

田中 大介 岡部 永年 高橋 学 黄木 景二 草川 明訓

出版者

一般社団法人日本機械学会

雑誌

講演論文集

巻号頁・発行日

vol.2005, no.43, pp.75-76, 2005-02-24

著者

田中 大介 高橋 学 黄木 景二 草川 明訓 岡部 永年

出版者

一般社団法人日本機械学会

雑誌

バイオエンジニアリング学術講演会・セミナー講演論文集

巻号頁・発行日

vol.2004, no.17, pp.409-410, 2005-01-21