| After interchanging matter,energy and information with natural environment over a long period of time,living beings have evolved special biological systems and survival skills for environmental adaptation.People can gain enlightenment from these functional systems and skills,so bionics has been developed.Coleoptera has a good performance in survival,their morphology,structure,material and function might bring inspiration to solve many engineering problems.Through a long evolution,Cyrtotrachelus bugueti guer has ability to fly agilely in air regardless of the weather and dig hole in soil for hibernation.Moreover,it can firmly climb and efficiently drill in vertical or high spots of bamboo.The macro morphology,microstructure,mechanical and functional properties of its body parts are the optimization results of natural evolution.However,to date,most researches about this weevil were focused on its biological properties and control measures,rather than anatomical features or organ functions.For better understanding and excavating its potential application in engineering,the crucial parts related to feeding and flight behaviors,which include mouthparts,rostrum,pronotum,elytra and underwing,were taken as the research objects in this work.Also,the macro morphology,microstructure,nanomechanics property and kinetic characteristics of these crucial parts were analyzed.The whole geometric shape parameters of insect were examined,and the macro morphology and microstructure of each key part were analyzed by microscopes.Then,a nano indenter was employed to investigate the hardness and elastic modulus of surface or cross-section of each part,and the differences of nanomechanics properties between different parts were discussed.Furthermore,based on field investigation and dynamic microscopic observation,the movement mechanism of mouthparts in adult weevil was recorded and the mechanism of feeding behavior was analyzed.It was found that “clamping” of mandibles and “twisting” of head are the main movements when feeding.Besides,energy disperse spectroscopy,microscopes and simulation analysis method were used to analyze the elements,structure and torsional resistance capacity.The integrated relationship about “structure – material – function” in rostrum was explored in present work.It also revealed that multi-material lamination and scaled down layers are the key to a good capacity of torsional resistance.Additionally,the kinetic characteristic analysis on flight behavior of adult was dealt with by a high-speed motion picture camera.Also,the dynamic action regulations of elytra and underwings were recorded detailedly when folding,unfolding and flapping.To satisfy the practical demand of fruit/vegetable processing engineering,Cyrtotrachelus bugueti guer larva was treated as a bionic prototype in this research.Computer vision technology was applied to complete the quantitative analyses of larva mandibles.Considering the operating principle of chopper,a design theory of bionic chopping blade with high efficiency and low energy was carried out in this paper.Besides,mechanical property tests by static and dynamic simulation analysis method was used to impove the design of the blade.Meanwhile,a special testbed was built and a series of mincing experiments were operated.According to the test between different blades,the bionic blade showed better performance on working efficiency and saving energy,compared with conventional blades.This work may provide theoretical basis and technique support in research and development of vegetable processing equipment.Accordingly,a sustainable utilization of the fruit and vegetable resource will be promoted,and the needs in related production and living problems will be solved. |
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