Abstract
Most insects can regulate friction with their seta structure when moving or crawling. To investigate the complicated friction behavior brought by the large deflection of seta structure, the nonlinear cantilever beam model with reactive support and friction force was established. The friction experiments of the seta structure were also conducted to verify the analytical results. The effect of loading conditions on the friction behavior of seta structure was discussed. It demonstrates that the friction force reacts nonlinearly with the applied normal displacement and exhibits obvious friction-reduction. The seta structure exhibits frictional anisotropy when sliding forward or backward which becomes more pronounced for small applied displacement and initial angle. Those findings provide valuable insights into the insects’ tribology mechanisms.
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