Mechanical Evaluation of the Skeletal Structure and Tissue of the Woodpecker and Its Shock Absorbing System

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  • ODA Juhachi
    Bionic Design Laboratory, Department of Human & Mechanical Systems Engineering, Kanazawa University
  • SAKAMOTO Jiro
    Bionic Design Laboratory, Department of Human & Mechanical Systems Engineering, Kanazawa University
  • SAKANO Kenichi
    FR Chassis Planning & Engineering Department, Chassis Production Engineering Division, Toyota Motor Corporation

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Abstract

A woodpecker strikes its beak toward a tree repeatedly. But, the damage of brain or the brain concussion doesn’t occur by this action. Human cannot strike strongly the head without the damage of a brain. Therefore, it is predicted that the brain of a woodpecker is protected from the shock by some methods and that the woodpecker has the original mechanism to absorb a shock. In this study, the endoskeltal structure, especially head part structure of woodpecker is dissected and the impact-proof system is analyzed by FEM and model experiment. From the results, it is obvious that the woodpecker has the original impact-proof system as the unique states of hyoid bone, skull, tissue and brain. Moreover it is considered that woodpecker has the advanced impact-proof system relating with not only the head part but also with the whole body.

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