• DOI:10.1002/admi.202000987
• Corpus ID: 225194802

Dynamic Friction Performance of Hierarchical Biomimetic Surface Pattern Inspired by Frog Toe‐Pad

@article{Banik2020DynamicFP,
  title={Dynamic Friction Performance of Hierarchical Biomimetic Surface Pattern Inspired by Frog Toe‐Pad},
  author={Arnob Banik and K. T. Tan},
  journal={Advanced Materials Interfaces},
  year={2020},
  volume={7}
}

• A. Banik, K. Tan
• Published 23 August 2020
• Engineering
• Advanced Materials Interfaces

In this study, the dynamic friction performance of frog toe‐pad inspired surface patterns is investigated in three folds. First, frog toe‐pad morphology is mimicked, designed, and fabricated using 3D printing technology. Friction coefficients of the models are measured experimentally over a wet medium, with varying velocity, load, and sliding direction. Furthermore, time is recorded to reach a 5 mm height by the water flow through a steady model in another experimental set‐up. Second, numerical simulation is employed to study the contact area, sliding displacement, and frictional stress of the model tread patterns. Surfaces with different low frictional coefficients are considered to simulate the presence of wet medium and surface roughness. Third, an analytical model is utilized to calculate the water squeeze‐out time, as well as the height difference of drained water during wet surface conditions. Among three different bioinspired models, built to compare with a sample tire design, the double‐layered studded hexagonal pattern shows the best wet traction performance. This study demonstrates that the bioinspired hierarchical studded hexagonal model can provide design solutions for future tire treads with enhanced wet friction performances, as well as applications in products requiring surface wet traction enhancement, including boot soles, roller surfaces, and surgical grippers.