Elasto-plastic large deformation analysis of multi-patch thin shells by isogeometric approach
This paper studies elasto-plastic large deformation behaviour of thin shell structures using the isogeometric computational approach with the main focus on the efficiency in modelling the multi-patches and arbitrary material formulation. In terms of modelling, we employ the bending strip method to c...
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Veröffentlicht in: | Finite elements in analysis and design 2020-06, Vol.173, p.103389, Article 103389 |
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Hauptverfasser: | , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | This paper studies elasto-plastic large deformation behaviour of thin shell structures using the isogeometric computational approach with the main focus on the efficiency in modelling the multi-patches and arbitrary material formulation. In terms of modelling, we employ the bending strip method to connect the patches in the structure. The incorporation of bending strips allows to eliminate the strict demand of the C1 continuity condition, which is postulated in the Kirchhoff-Love theory for thin shell, and therefore it enables us to use the standard multi-patch structure even with C0 continuity along the patch boundaries. Furthermore, arbitrary nonlinear material models such as hyperelasticity and finite strain plasticity are embedded in the shell formulation, from which a unified thin shell formulation can be achieved. In terms of analysis, the Bézier decomposition concept is used to retain the local support of the traditional finite element. The performance of the presented approach is verified through several numerical benchmarks.
•Unified thin shell formulation allowing arbitrary mateiral nonlinearity.•Multi-patch shell structure applicable.•C1 continuity at patch boundaries by bending strip method.•Bézier decomposition concept to retain local support of the traditional FE. |
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ISSN: | 0168-874X 1872-6925 |
DOI: | 10.1016/j.finel.2020.103389 |