Técnica adaptativa de elementos finitos para análise limite e de "Shakedown" para cascas finas axi-simétricas

AUTOR(ES)

Felicio Bruzzi Barros

DATA DE PUBLICAÇÃO

1996

RESUMO

Improvements in the technique for finite element shakedown and limit analysis of axisymmetrical shells, proposed by [Franco, 1987], are presented. Basic concepts of the continuum mechanics are first summarized and the technique is introduced.l The stress problem due to the temperature gradient at the contact of a supporting skirt of a coke drum is analyzed. The elastic solution obtained from the thin shell theory was implemented for considering indirect load. An error estimator combined with adaptive procedures for an h-refinement are presented to obtain much more reliable solutions.A new finite element compatible with a more sophisticated yield surface is developed. Although the formulation for a complete shakedown analysis has not been implemented, limit analysis problems were studied for each proposed topic which illustrate the effectiveness and quality of the formulations.

ASSUNTO(S)

método dos elementos finitos teses. engenharia de estruturas teses. cascas (engenharia) teses.

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