Numerical investigation into the impact-resistance of complex biological organs remains challenging because of the difficulties in obtaining accurate models and precise material properties. In this work, the elegance of a woodpecker's head, including a slender hyoid connected by a spherical hinge and two revolute hinges, a long upper beak, a short lower beak, and an encephalocoele filled with viscoelastic brain substances, was obtained via a reaction-diffusion based imaging process on the micro-CT data. The material heterogeneity was fully considered in subsequent finite element analysis in LS-Dyna via categorizing the intensity into 53 groups and interpolating their properties from available data of rhamphotheca, hyoid, skull, and beak. Compared to a non-hyoid model, we found the hyoid helps to significantly alleviate the strain in the brain and restrain opposite velocity for maintaining structural stability, especially after impact. Numerical investigation also indicates that a longer upper beak is favorable in flatting the curve of impact force and improve structural crashworthiness.

由于难以获得精确的模型和精确的材料特性，因此对复杂生物器官的抗冲击性进行数值研究仍然具有挑战性。在这项工作中，啄木鸟的头部非常优雅，包括通过球形铰链和两个旋转铰链连接的细长舌骨，长长的上喙，较短的下喙以及充满粘弹性脑物质的脑小肠，基于微CT数据的基于扩散的成像过程。在随后的LS-Dyna有限元分析中，通过将强度分类为53个组并根据红腐菌，舌骨，舌骨和喙的可用数据内插它们的属性，充分考虑了材料的异质性。与非舌骨模型相比，我们发现，舌骨有助于显着减轻大脑的劳损，并限制相反的速度以保持结构稳定性，尤其是在撞击后。数值研究还表明，较长的上喙有利于平整冲击力曲线并提高结构耐撞性。