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Effect of Porosity and Normal Load on Dry Sliding Friction of Polymer Foam Blocks

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Abstract

In this study, the effect of porosity on the dry sliding fiction of ethylene-vinyl acetate (EVA) foams was investigated under different normal load conditions. EVA foam blocks with varying porosities were slid against a smooth stainless steel plate under dry conditions. The friction coefficient increased with increasing porosity under all of the normal load conditions. In addition, the contact area was estimated using a contact model considering elastic buckling of the cell walls (elastic collapse). The elastic collapse area in the anterior portion of the EVA foam block increased with increasing normal load and porosity, which resulted in an increased contact area. Furthermore, the friction coefficient was positively correlated with the estimated contact area divided by the normal load, indicating that adhesion friction increases with increasing porosity of polymer foams. These results may contribute to the design of high-friction, lightweight shoe sole tread blocks prepared using polymer foam blocks.

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Authors and Affiliations

  1. Graduate School of Engineering, Tohoku University, 6-6-01 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi, 980-8579, Japan

    Takeshi Yamaguchi, Takehiko Sugawara, Motoi Takahashi, Kei Shibata & Kazuo Hokkirigawa

  2. Graduate School of Biomedical Engineering, Tohoku University, Sendai, Miyagi, Japan

    Takeshi Yamaguchi

  3. Institute of Sports Science, ASICS Corporation, Kobe, Japan

    Kenta Moriyasu & Tsuyoshi Nishiwaki

Authors
  1. Takeshi Yamaguchi
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  2. Takehiko Sugawara
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  3. Motoi Takahashi
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  4. Kei Shibata
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  5. Kenta Moriyasu
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  6. Tsuyoshi Nishiwaki
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  7. Kazuo Hokkirigawa
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Correspondence to Takeshi Yamaguchi.

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Yamaguchi, T., Sugawara, T., Takahashi, M. et al. Effect of Porosity and Normal Load on Dry Sliding Friction of Polymer Foam Blocks. Tribol Lett 66, 34 (2018). https://doi.org/10.1007/s11249-018-0988-z

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  • DOI: https://doi.org/10.1007/s11249-018-0988-z

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