Geometrically non-linear analysis of laminated composite structures using a 4-node co-rotational shell element with enhanced strains |
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Authors: | Ki-Du Kim Songsak Suthasupradit |
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Institution: | a Department of Civil and Environmental System Engineering, Konkuk University, Seoul 130702, Korea b Department of Civil Engineering, Daewon Science College, 599 Shinwol, Jecheon 390702, Korea |
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Abstract: | To demonstrate the solutions of linear and geometrically non-linear analysis of laminated composite plates and shells, the co-rotational non-linear formulation of the shell element is presented. The combinations of an enhanced assumed strain (EAS) in the membrane strains and assumed natural strains (ANS) in the shear strains improve the behavior of 4-node shell element. To secure computational efficiency in the incremental non-linear analysis, the present element uses the form of the resultant forces pre-integrated through the thickness. The transverse shear stiffness of the laminates is defined by an equilibrium approach instead of the shear correction factor. Numerical examples of this study show very good agreement with the references. |
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Keywords: | Non-linear behavior Laminates Enhanced assumed strain (EAS) Assumed natural strain (ANS) Co-rotational resultant shell element |
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