The Hydraulic Mechanism Of Microfluid In Vein During Unfolding Process

The beetle has excellent flight performance, the diversified flight skills are mostly depends onthe wing membrane structure. The wings of insects have the optimized properties in structures,functions and materials through the evolution of millions of years. In most beetles, the hind wingsare thin and fragile; when at rest, they are held over the back of the beetle. When the hind wingunfolds, it provides the necessary aerodynamic forces for flight. In this paper, we investigate theunfolding process of the hind wings in Dorcus titanus platymelus, Copris ochus Motschulsky andCybister japonicus Sharp (Oder: Coleoptera) and the motion characteristics of blood in the veins ofthe structure system show the veins microfluidic control the hydraulic mec hanism of the unfoldingprocess.The micromorphologies of the wings’veins of the membranous wings of the three species ofinsects (Dorcus titanus platymelus, Copris ochus Motschulsky and Cybister japonicus Sharp), usingthe reverse engineering technology achieved the reconstruction of3D geometric models. The wingunfolding process of beetles was examined using high speed camera sequences (400frames/s), andthe hydraulic pressure in the veins was measured with a biological pressure sensor and dynamicsignal acquisition and analysis (DSA) during the expansion process. We found that the total timefor the release of hydraulic pressure during wing folding is longer than the time required forunfolding. The pressure is proportional to the length of the wings and the body mass of the beetle.A retinal camera was used to investigate the fluid direction. We found that the peak pressurescorrespond to two main cross-folding joint expansions in the hind wing. These observations stronglysuggest that blood pressure facilitates the extension of hind wings during unfolding; The flowchanges data were obtained according to the simulation, applied origin software coupled withPoiseuille’s law to obtain the equations of microfluidic motion and flow equation; the wing veinsunfold within the flow field successive dynamic simulation deployment process of hind wing (inDorcus titanus platymelus and Cybister japonicus Sharp) in the whole travel, using commercialfluid dynamic software FLUENT, mainly from the two aspects of pressure andvelocity vector of the corresponding numerical study on the movement characteristics, it provides abionic foundation to design and develop flying micro-robots. This thesis adopted the method of combination of medical study and engineering study, clinicalmedical imaging, integrated CFD,3D reconstruction technology, embedded UDF and dynamicmesh technique, numerical simulation of the hind wing venation of the unfolding process ofmicrofluid characteristics. We anticipate our work to be the basis of further sophisticated researchon the folding and unfolding mechanisms of beetle hind wings and microfluidic control research asthese mechanisms may provide design insights for portable MAVs with morphing wings and giveinspiration to the development bioinspired deployable systems.