Análise limite recorrendo ao critério de rotura de Matsuoka-Nakai estendido em condições de deformação plana
DOI:
https://doi.org/10.14195/2184-8394_157_2Palavras-chave:
limit analysis, critério de Matsuoka-Nakai estendido, estado plano de deformação, método de direcção alternada de multiplicadores (MDAM)Resumo
Este artigo apresenta a implementação do critério de rotura de Matsuoka-Nakai Estendido numa formulação de Análise Limite, em condições de deformação plana. A abordagem apresentada é baseada num modelo misto de elementos finitos de três campos e no algoritmo de otimização que se designa por Método de Direção Alternada de Multiplicadores. Para esse propósito, é estabelecida e explorada uma equivalência entre o critério clássico de Mohr-Coulomb e o critério de Matsuoka-Nakai estendido. São apresentadas três aplicações
numéricas para testar e ilustrar as capacidades desta abordagem. Os resultados são confrontados com soluções de outros autores ou com dados experimentais.
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