The Stealth Characteristic Of Morpho Butterfly Wings And Mechanics Analysis And Fabrication Exploration Of Its Bionic Structure

The surface of Morpho butterfly’s wings and scales are distributed with nanometer size of tree ridge layer of three-dimensional fine structure. In vertical direction, they are the equal spaced permutation which are practically paralleled to each other. The breadth of the layers present a kind of arithmetic progression distribution and the internal is filled with atmosphere. In horizontal direction, the layers show a sort of derangement permutation around the two sides of the spinal column. Along the spinal veins, the interval between two contiguous tree ridge structures is about 50 nm. A plurality of continuous tree ridge structures constitutes a natural diffraction grating structure. This elaborate structure is the physiological basis of optical property of Morpho butterfly’s wings.Based on the experimental study, it is discovered that this structure has a strong characteristic of selectivity on wavelength that means it can choose the wavelength of sunlight shinning on the surface of butterfly’s wings. At the same time, the hidden nanometer size of three-dimensional fine structure in butterfly’s wings also has a effect of enhance and restrain the radiation on specific bond of light. In fact, it is butterfly’s wings’ recessive characteristic. This article combine with experiment, simulation, optics, mechanics and some other aspects to study the optics recessive characteristic of Morpho butterfly’s wings and its statics support of three-dimensional bionic structure meticulously. It mainly includes using various kinds of accurate optical strobe to observe the physical structure of natural butterfly’s wings, such as scanning electron microscope and transmission electron microscope. The butterfly’s wings and scales structure results the light comes up with combined effects such as reflection, refraction and diffraction. This is exactly the source that butterfly’s wings and scales can generate different color.At the same time, on the base of physical structure, this article goes further to set up a scaffold of optic test. It concentrate on the recessive characteristic and finds out that there exist reflection, refraction, diffraction or some other optical response between two different layers in Morpho structure due to the different refractive index. The accumulation of these results is the main reason that generates the recessive characteristic. In addition, based on the natural structure, this article use some software like SolidWorks and RsoftCAD to optimize the butterfly’s wings structure. It sets up bionic three-dimensional model(depth in the two-dimensional model is not required) and retains the basic characteristic of the structure. Simultaneously, the article use ANSYS to analysis the structure under the circumstances of sustaining self-weight with statics method. It expresses the merit and demerit about the preparation of the structure and then proposes the relevant modified model. Finally, after clarifing the properties of the molded Morpho butterfly’s wings stealth mechanism,we proposed a model which blends these structures of producing the stealth performance, and have done a lot of work to imitate this model structure.The accomplishment of this work significant reference sense on completing the study of optical property of butterfly’s wings, breaking through the existing requirement of military stealth performance and then realizing the preparation of bionic structure about butterfly’s wings eventually.