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S25 Métodos Numéricos |
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Titulo:
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ERROR ESTIMATION AND ADAPTIVITY FOR A MIXED FORMULATION OF LIMIT ANALYSIS
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Resumo :
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THE MAIN OBJECTIVE OF THIS PAPER IS TO PROPOSE AN ADAPTIVE MESH REFINEMENT PROCESS FOR MIXED FINITE ELEMENT MODELS IN LIMIT ANALYSIS. WE USE AN A POSTERIORI ERROR ESTIMATOR BASED ON A LOCAL DIRECTIONAL INTERPOLATION ERROR AND A RECOVERING PROCEDURE FOR THE SECOND DERIVATIVES OF THE FINITE ELEMENT SOLUTION. THE MESH ADAPTATION PROCESS PROPOSED GIVES IMPROVED RESULTS IN LOCALIZING REGIONS OF RAPID OR ABRUPT VARIATIONS OF THE VARIABLES, WHOSE LOCATION ARE NOT KNOWN A PRIORI. WE APPLY THE ABOVE PROCEDURE TO LIMIT ANALYSIS CONSIDERING BODIES IN PLANE STRAIN AND WITH SYMMETRY OF REVOLUTION.
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Autores :
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Alves Borges, Lavinia Sanabio
da Costa, Cyntia Gonçalves
Feijóo, Raul Antonino
Zouain, Nestor
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Trabalho Completo :
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