MECHANICAL ANALYSIS OF BI-STABLE CYLINDRICAL SHELL STRUCTURE
Bi-stable structure can be stable in both the extended and rolled-up configurations. As a novel deployable structure,it shows a broad application prospect in the field of aeronautics and civil engineering,etc. A deformed isotropic structure has no bending-stretching and twisting-bending coupling. However,if made unstressed from isotropic materials it is only stable in the initial configuration. So pre-stressed isotropic cylinder shell model is proposed. This model illustrates the effect of prestress on bi-stable behavior of such structure. The conditions for bi-stability of isotropic cylindrical shell are derived based on the principle of the minimum strain energy. Meanwhile,a finite element analysis of the process of rolling up a bi-stable cylindrical shell is performed using the ABAQUS package. The results of this simulation provide considerable new insights into the structural mechanics of bi-stable shell,as well as predicting the stress distribution,curvature variation,etc. in the rolled-up shell. Furthermore,a deformed isotropic cylindrical shell without or with pre-stresses has its two equilibrium positions where there is never twisting deformation. For the former,the first equilibrium position of the shell is stable while the second is unstable. However,a pre-stressed shell will have its bi-stable states if the acting pre-stress satisfies some confined conditions,and it has two opposite curvatures corresponding to the two stable states.
Bi-stable Cylindrical shell Pre-stress Isotropic Strain energy Numerical simulation
Yao-Peng Wu
Key Laboratory for Structural Engineering and Earthquake Resistance of China Education Ministry,Xian University of Architecture and Technology,Xian 710055,P.R. China
国际会议
The Eleventh International Symposium on Structural Engineering(第十一届结构工程国际研讨会)
广州
英文
651-656
2010-12-01（万方平台首次上网日期，不代表论文的发表时间）