Self-shaping of bioinspired chiral composites  

作　　者：Qing-Qing Rong Yu-Hong Cui Takahiro Shimada Jian-Shan Wang Takayuki Kitamura 

机构地区：[1]Tianjin Key Laboratory of Modern Engineering Mechanics,Department of Mechanics,Tianjin University [2]Department of Mechanical Engineering and Science,Kyoto University

出　　处：《Acta Mechanica Sinica》2014年第4期533-539,共7页力学学报（英文版）

基　　金：supported by the National Basic Research Program of China(2012CB937500);Grants-in-Aid for Scientific Research(21226005)from the Japan Society for the Promotion of Science(JSPS);the National Natural Science Foundation of China(11272230 and 11172207);the Basic Application and Advanced Technology Research Project in Tianjin(11JCYBJC09700)

摘　　要：Self-shaping materials such as shape memory polymers have recently drawn considerable attention owing to their high shape-changing ability in response to changes in ambient conditions, and thereby have promising applications in the biomedical, biosensing, soft robotics and aerospace fields. Their design is a crucial issue of both theoretical and technological interest. Motivated by the shape-changing ability of Towel Gourd tendril helices during swelling/deswelling, we present a strategy for realizing self-shaping function through the deformation of micro/nanohelices. To guide the design and fabrication of selfshaping materials, the shape equations of bent configurations, twisted belts, and helices of slender chiral composite are developed using the variation method. Furthermore, it is numerically shown that the shape changes of a chiral composite can be tuned by the deformation of micro/nanohelices and the fabricated fiber directions. This work paves a new way to create self-shaping composites.Self-shaping materials such as shape memory polymers have recently drawn considerable attention owing to their high shape-changing ability in response to changes in ambient conditions, and thereby have promising applications in the biomedical, biosensing, soft robotics and aerospace fields. Their design is a crucial issue of both theoretical and technological interest. Motivated by the shape-changing ability of Towel Gourd tendril helices during swelling/deswelling, we present a strategy for realizing self-shaping function through the deformation of micro/nanohelices. To guide the design and fabrication of selfshaping materials, the shape equations of bent configurations, twisted belts, and helices of slender chiral composite are developed using the variation method. Furthermore, it is numerically shown that the shape changes of a chiral composite can be tuned by the deformation of micro/nanohelices and the fabricated fiber directions. This work paves a new way to create self-shaping composites.

关 键 词：Self-shaping · Bioinspired chiral composites ·Micro/nanohelices · Tendrils 

分 类 号：O341[理学—固体力学]