An improved adaptive formulation for the computation of limit analysis problems of thin axisymmetrical shells
| Autor: | José Ricardo Queiroz Franco, Felício Bruzzi Barros, Alan R.S. Ponter |
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| Rok vydání: | 2009 |
| Předmět: |
Yield surface
Mechanical Engineering Mathematical analysis Geometry Bending Curvature Upper and lower bounds Displacement (vector) Finite element method Computer Science Applications Piecewise linear function Limit analysis Modeling and Simulation General Materials Science Civil and Structural Engineering Mathematics |
| Zdroj: | Computers & Structures. 87:1602-1610 |
| ISSN: | 0045-7949 |
| DOI: | 10.1016/j.compstruc.2009.08.014 |
| Popis: | An improved adaptive technique for the finite element formulation of limit analysis problems of symmetrically loaded thin shells of revolution is presented. Bending, membrane behavior and changes of curvature are simulated by using an axisymmetrical thin shell element of three nodes associated with a new piecewise linear (PWL) yield surface. The results obtained show better upper bounds when compared to other numerical and analytical solutions reported in the literature. Finally, an a posteriori error measure is re-written to include the new displacement rate and PWL strain rate fields, resulting in an adaptive scheme for refining the finite element mesh. |
| Databáze: | OpenAIRE |
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