Geometry Structure And Modeling Of Butterfly Scales

Many scientists have been attracted by the colorful butterflies and they paid attention to the structure color of the biosphere,which provides new ideas for textile design.Therefore the scale structure of butterfly was studied in this dissertation,which can give a direction for the textiles in the future.Papilio maackii,papilio bianor,papilio helenus and palilio xuthus were chosen to be the samples.In order to observe the morphological features of the butterfly wings,the closed wings of the four kinds of butterflies should be opened up firstly.The scales of different color of papilio maackii and papilio bianor form beautiful pattern after distribution combination through the different parts of different density,which have metallic luster.The arrangement of papilio helenus and palilio xuthus scales are intensive,which form to be scaling.And the recombination of the scaling form to be colorful pattern.Though these designs are irregular,the overall and local has self-similarity features.In this paper,the external morphology characteristics of the four kinds of butterflies were analyzed by fractal theory and be imitated by apophysis software.Beautiful butterfly shapes are designed to provide reference for the possible fabric design.The surface morphology and structure characteristics of butterfly scales were observed by OM and SEM.The distribution of Papilio maackii and papilio bianor scales are sparse,but have good luster.The distribution of papilio helenus and palilio xuthus are intensive to form to be scaling,which looks like paint.The SEM pictures show that papilio maackii and papilio bianor scales have embossment structure,but their shape and size are different.The four kinds of these butterflies all have mesh structures,the shape and size are different.Based on the scale structure element parameters and the feature size,the three-dimension entity model were built by solidworks software to make the butterfly scale structure be visual.The positive and negative reflection spectrum curve of the front and back wings of the four kinds butterflies were tested by UV-VIS-NIR spectrophotometer.The results showed that the positive reflection spectrum curve rule of the wings of Papilio maackii and papilio bianor were same,and the negative reflection spectrum curve rule were also same,but the reflectivity were different.The positive and negative reflection spectrum curve rule of front wings of palilio xuthus were the same,and the back wings had the same rule,but the reflectivity were different too.The positive reflection spectrum curve of the back wings of the four kinds butterflies were compared to show that the reflection rate of palilio xuthus was higher than the others.The result was refected by the test parts.The test part of palilio xuthus was scaling where the arrangement of scales was intensive and reflection property was well.Inversely,the arrangement of scales of papilio maackii and papilio bianor was sparse.The reflection rate of papilio bianor was nearly zero.The surface morphology and microstructure characteristics of Angelina fibers were observed by using OM and SEM.The results showed that Angelina fiber has shining color because of film interference.The three-dimension model of the Angelina fiber structure was built by solidworks software.The reflection spectrum curve of the Angelina fiber was tested by UV-VIS-NIR spectrophotometer.The specific resistance and static performance of Angelia fiber were tested.The reflection spectrum curve showed that the reflection rate increased as the wavelength rose and the peak of wave was at 600nm which fit the golden yellow color the angelina fiber.