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Materials & Design v.117, 2017년, pp.37 - 46   SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

The loading-rate dependent tensile behavior of CNT film and its bismaleimide composite film

Zhang, Mengsi (Key Laboratory of Aerospace Advanced Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Haidian District, Beijing 100191, China ) ; Li, Min (Key Laboratory of Aerospace Advanced Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Haidian District, Beijing 100191, China ) ; Wang, Shaokai (Key Laboratory of Aerospace Advanced Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Haidian District, Beijing 100191, China ) ; Wang, Yanjie (Key Laboratory of Aerospace Advanced Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Haidian District, Beijing 100191, China ) ; Zhang, Yongyi (Suzhou Institute of Nano-tech and Nano-bionics, No. 398 Ruoshui Road, Suzhou 215123, China ) ; Gu, Yizhuo (Key Laboratory of Aerospace Advanced Materi ) ; Li, Qingwen ; Zhang, Zuoguang ;
  • 초록  

    Abstract Carbon nanotube (CNT) macroscopic assembly, as a promising candidate for the protective and anti-collision materials, has attracted lots of researchers to explore its mechanical behavior under different loading rates. In this paper, the loading-rate dependent mechanical behavior of CNT film and its composite with bismaleimide (BMI) matrix is investigated. The pristine CNT film shows decreased tensile strength by 33.8% when the loading rate increases from 0.05mm/min to 40mm/min. An obvious necking extending phenomenon is observed in the CNT film during the tensile test under lower tensile rates, e.g. 0.05mm/min and 0.5mm/min. However, the random composite film and the oriented composite film both display increased tensile strength, by 58.2% and 35.7% respectively, with the increasing loading rate from 0.05mm/min to 40mm/min. The different loading-rate dependence of tensile behavior is ascribed to the different tensile-induced motions of CNTs and CNT bundles in composite film. Moreover, strain rate sensitivity coefficients of different film are calculated according to a simplified Johnson-Cook model. The results suggest that the pristine CNT film with the strain rate sensitivity coefficient of −0.0941 has a high loading-rate sensitivity, meanwhile polymer infiltration and oriented alignment can weaken the loading-rate sensitivity of CNT film. Highlights Tensile strength of the pristine CNT film decreases with loading rate increasing from 0.05mm/min to 40mm/min. The random CNT/BMI composite film and the oriented CNT/BMI composite film both exhibit a loading-rate strengthening effect. Polymer infiltration and oriented alignment of CNTs are found to weaken the loading-rate sensitivity of the CNT film. Graphical abstract [DISPLAY OMISSION]


  • 주제어

    Carbon nanotube film .   Polymer composite .   Tensile properties .   Loading-rate sensitivity.  

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