| AN IMPROVED ARC-LENGTH METHOD AND APPLICATION IN THE POST-BUCKLING ANALYSIS FOR COMPOSITE STRUCTURES |
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| 作者姓名： | 朱菊芬 初晓婷 |
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| 作者单位： | Department of Engineering Mechanics，Dalian University of Technology，Dalian 116023，P R China，Department of Engineering Mechanics，Dalian University of Technology，Dalian 116023，P R China |
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| 基金项目： | Foundation item:the Aeronauties Science Foundation of China(00B01001) |
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| 摘 要： | Based on the conventional arc- length method, an improved arc- length method with high-efficiency is proposed. The weighted modifications with respect to the variation of structural stiffness and extra-interpolation modification by using the information of known equilibrium points are introduced to improve the incremental arc- length . An approximate expansion method for the accumulated and expected arc-length is used to ensure the convergence at given load levels in large range of applications. Numerical results show that the improved arc-length method has well adaptability and higher efficiency in the post-buckling analysis of plates and sheik structures for tracing whole load-deflection path and obtaining the convergence values at any specified load levels.
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| 收稿时间： | 9 March 2001 |
An improved arc-length method and application in the post-buckling analysis for composite structures |
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| Zhu Ju-fen Professor,Chu Xiao-ting.AN IMPROVED ARC-LENGTH METHOD AND APPLICATION IN THE POST-BUCKLING ANALYSIS FOR COMPOSITE STRUCTURES[J].Applied Mathematics and Mechanics(English Edition),2002,23(9):1081-1088. |
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| Authors: | Zhu Ju-fen Professor Chu Xiao-ting |
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| Institution: | Department of Engineering Mechanics, Dalian University of Technology, Dalian,116023, PR China |
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| Abstract: | Based on the conventional arc- length method, an improved arc- length method with high-efficiency is proposed. The weighted modifications with respect to the variation of structural stiffness and extra-interpolation modification by using the information of known equilibrium points are introduced to improve the incremental arc- length . An approximate expansion method for the accumulated and expected arc-length is used to ensure the convergence at given load levels in large range of applications. Numerical results show that the improved arc-length method has well adaptability and higher efficiency in the post-buckling analysis of plates and sheik structures for tracing whole load-deflection path and obtaining the convergence values at any specified load levels. |
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| Keywords: | nonlinear finite element analysis arc-length method |
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