FLAMBAGEM E COMPORTAMENTO PÓS-CRÍTICO DE COLUNAS LAMINADAS DE PERFIL ABERTO
DOI:
https://doi.org/10.26512/ripe.v2i22.20878Keywords:
Colunas. Materiais Compósitos. Estabilidade. Método de Elementos Finitos.Abstract
A utilização dos materiais compósitos, difundida em estruturas aeronáuticas na forma de placas e cascas laminadas, tem se destacado também na indústria da construção civil, sobretudo na fabricação de vigas e colunas. Estes materiais possuem várias vantagens quando comparados aos materiais tradicionais, contudo, o comportamento mecânico destas estruturas é mais complexo, principalmente devido à ortotropia dos compósitos. O presente trabalho tem como objetivos a determinação da carga crítica, do modo de flambagem e do comportamento pós-crítico de colunas laminadas de perfil aberto, buscando-se verificar a influência da geometria e esquema de laminação no comportamento da coluna, bem como observar em quais casos a flambagem irá prevalecer sobre a resistência do material. O colapso das colunas foi avaliado segundo a abordagem baseada na Falha da Primeira Lâmina (FPF) e, para isto, alguns critérios de falha foram usados e comparados. O comportamento das colunas foi simulado utilizando elementos finitos de casca laminada. A validação do modelo de análise foi feita a partir de resultados experimentais e numéricos encontrados na literatura obtendo-se excelente concordância.
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