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Structural Engineering and Mechanics   Volume 62, Number 6, June25 2017, pages 703-708
Non-stochastic interval factor method-based FEA for structural stress responses with uncertainty
Dongkyu Lee and Soomi Shin

Abstract     [Buy Article]
    The goal of this study is to evaluate behavior uncertainties of structures by using interval finite element analysis based on interval factor method as a specific non-stochastic tool. The interval finite element method, i.e., interval FEM, is a finite element method that uses interval parameters in situations where it is not possible to get reliable probabilistic characteristics of the structure. The present method solves the uncertainty problems of a 2D solid structure, in which structural characteristics are assumed to be represented as interval parameters. An interval analysis method using interval factors is applied to obtain the solution. Numerical applications verify the intuitive effectiveness of the present method to investigate structural uncertainties such as displacement and stress without the application of probability theory.
Key Words
    interval parameters; interval factor method; interval finite element analysis; structural behavior; uncertainty; non-stochastic
Dongkyu Lee: Department of Architectural Engineering, Sejong University, Seoul, 143-747, Korea

Soomi Shin: Research Institute of Industrial Technology, Pusan National University, Busan, 609-735, Korea

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