Crashworthiness Behavior Of Thin-walled Bioinspired Structures In The Coconut Palm Of Panama

Bioinspired design is consciously developed through research,study,and analysis of how living organisms have developed solutions to overcome the challenges of the natural world.In this way,the field of bioinspired materials contributes to the design of structures and the manufacture of materials,to combine known natural structures with a specific material.The main objective of this research is to be inspired by the vegetation of Panama and America,to identify,interpret,extract,design,verify and optimize a structure for energy absorption applications.This work summarizes concepts about bioinspiration,common characteristics in biological materials,according to several authors in conjunction with designs of thin-walled structures.The structures,properties,and anatomy of the coconut palm(Cocos nucifera)are studied as part of bioinspiration;considering that these plants are part of Panama vegetation.The bioinspiration method and technical route are also presented,which correspond to the search for biological strategies in plants to manage structural forces,analysis of mechanical properties,and structural characteristics of the palm.In this way,designs tending to the optimization of structural elements,such as the case of cylindrical tubes or square tubes,emerge through numerical analysis methods,which can be carried out to know the advantages,disadvantages,and efficiency of new designs.In this research,twelve designs of bioinspired tubes were studied,subjected to the Panama coconut palm.Six of them have square shapes and the other six have a cylindrical shape.The internal design of the tubes is divided into two groups for each geometric shape: group 1 has an internal structure with arches and group 2 has an internal structure with lines.These tubes were analyzed by numerical simulation using Abaqus software.At first,the dynamic analysis method was validated and then the designs were simulated under dynamic axial crushing load and oblique crushing load for angles from 5° to 30° with increment every 5°.Five crashworthiness criteria were used to verify the performance of the bioinspired tubes.