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Qualitative verification of the dispersion level in nano-composite and its application to YD-128/MWCNT composite to assess the wear characteristics with respect to the dispersion level

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Abstract

We analyzed the wear characteristics according to dispersion level of MWCNT in YD-128/MWCNT composite. Specimens for this study were fabricated using mechanical stirrer after blending of YD-128 and MWCNT. To change the dispersion level, the mixture of YD-128/MWCNT was stirred using mechanical stirrer during different times, such as, 15, 30, 60, and 120 minutes. Because the direct measuring of dispersion level is difficult in the case of solid composite, we suggest an indirect method for checking qualitatively the dispersion level as follows. Firstly, using the AEH (asymptotic expansion homogenization) in-house code, we analyzed numerically the mechanical stiffness of composite using RVEs (representative volume elements) which are modeled with different dispersion level. According to the numerical results of RVEs, we verified that the mechanical stiffness is higher as the dispersion degree is better. Then, through the experimental tensile test of the fabricated specimens using UTM, we obtained that the mechanical stiffness is higher as the stirring time is longer. Consequently, we could ensure that the dispersion degree of the fabricated specimens is better as the mechanical stirring time is longer. Finally, we assessed the wear test using abrading machine with fabricated specimens. We confirmed that the abrasion loss is decreased according to the increasing of dispersion degree in the case of YD-128/MWCNT composites.

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Authors and Affiliations

  1. Division of Mechanical and Automotive Engineering, College of Engineering, Wonkwang University, 460 Iksandae-ro, Iksan, Jeonbuk, 570-749, Korea

    Ghi Pyoung Choi, Chang Hee Woo, Se-Hwan Lee, Sang Hyun Ahn & Young-Sam Cho

  2. Division of Mechanical and Energy Systems Engineering, College of Engineering, Korea Maritime University, 727 Taejong-ro, Yeongdo-gu, Busan, 606-791, Korea

    Dongwoo Sohn

Authors
  1. Ghi Pyoung Choi
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  2. Dongwoo Sohn
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  3. Chang Hee Woo
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  4. Se-Hwan Lee
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  5. Sang Hyun Ahn
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  6. Young-Sam Cho
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Correspondence to Young-Sam Cho.

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Recommended by Associate Editor Moon Ki Kim

Young-Sam Cho received his B.S., M.S., and Ph.D. degrees in Mechanical Engineering from KAIST in 1997, 1999, and 2004, respectively. He is currently an associate professor at Wonkwang University, Korea. His research interests include computational mechanics, tissue engineering, and surface modification.

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Choi, G.P., Sohn, D., Woo, C.H. et al. Qualitative verification of the dispersion level in nano-composite and its application to YD-128/MWCNT composite to assess the wear characteristics with respect to the dispersion level. J Mech Sci Technol 27, 3131–3138 (2013). https://doi.org/10.1007/s12206-013-0833-0

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  • DOI: https://doi.org/10.1007/s12206-013-0833-0

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