Nonlinear mechanics of a ring structure subjected to multi-pairs of evenly distributed equal radial forces  

作　　者：Q. Chen F. Sun Z. Y. Li L. Taxis N. Pugno 

机构地区：[1]Biomechanics Laboratory, School of Biological Science and Medical Engineering, Southeast University [2]State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics [3]School of Chemistry, Physics and Mechanical Engineering,Queensland University of Technology (QUT) [4]Laboratory of Bio-Inspired and Graphene Nanomechanics,Department of Civil, Environmental and Mechanical Engineering, University of Trento [5]School of Engineering and Materials Science, Queen Mary University of London [6]Ket Lab, Italian Space Agency, Via del Politecnico snc

出　　处：《Acta Mechanica Sinica》2017年第5期942-953,共12页力学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grants 31300780, 11272091, 11422222, and 31470043);the Fundamental Research Funds for the Central Universities (Grant 2242016R30014);ARC(Grant FT140101152);the European Research Council PoC 2015 "Silkene" (Grant 693670);the European Commission H2020 under the Graphene Flagship Core 1 (Grant 696656) (WP14"Polymer Nanocomposites");the FET Proactive "Neurofibres" (Grant 732344)

摘　　要：Combining the elastica theory, finite element (FE) analysis, and a geometrical topological experiment, we studied the mechanical behavior of a ring subjected to multi-pairs of evenly distributed equal radial forces by looking at its seven distinct states. The results showed that the theoretical predictions of the ring deformation and strain energy matched the FE results very well, and that the ring deformations were comparable to the topological experiment. Moreover, no matter whether the ring was compressed or tensioned by N-pairs of forces, the ring always tended to be regular polygons with 2N sides as the force increased, and a proper compressive force deformed the ring into exquisite flower-like patterns. The present study solves a basic mechanical problem of a ring subjected to lateral forces, which can be useful for studying the relevant mechanical behavior of ring structures from the nano- to the macro-scale.Combining the elastica theory, finite element (FE) analysis, and a geometrical topological experiment, we studied the mechanical behavior of a ring subjected to multi-pairs of evenly distributed equal radial forces by looking at its seven distinct states. The results showed that the theoretical predictions of the ring deformation and strain energy matched the FE results very well, and that the ring deformations were comparable to the topological experiment. Moreover, no matter whether the ring was compressed or tensioned by N-pairs of forces, the ring always tended to be regular polygons with 2N sides as the force increased, and a proper compressive force deformed the ring into exquisite flower-like patterns. The present study solves a basic mechanical problem of a ring subjected to lateral forces, which can be useful for studying the relevant mechanical behavior of ring structures from the nano- to the macro-scale.

关 键 词：Ring structures Mechanical properties SHAPE Strain energy 

分 类 号：O322[理学—一般力学与力学基础]