Análise de Falhas em Materiais Anisotrópicos com Fibras Embutidas Utilizando a Mecânica do Dano Concentrado Expandida
DOI:
https://doi.org/10.70567/mc.v42.ocsid8366Palavras-chave:
Materiais anisotrópicos, reforços embutidos, mecânica do danoResumo
O uso de materiais com comportamento anisotrópico tem se intensificado nas últimas décadas, impulsionado pela demanda por soluções estruturais mais eficientes. Nesse contexto, o reforço com fibras configura-se como uma estratégia eficaz para aprimorar o desempenho mecânico em direções com menor resistência intrínseca. A modelagem de falhas desses materiais, entretanto, ainda permanece como um desafio significativo. Neste trabalho, emprega-se a Mecânica do Dano Concentrado Expandida (XLDM) para descrever o comportamento fisicamente não linear de materiais anisotrópicos. Essa abordagem, fundamentada em conceitos da mecânica da fratura e do dano contínuo, tem se mostrado robusta na análise de processos de degradação estrutural. Além disso, adota-se uma técnica de embutimento para representar adequadamente o efeito dos reforços sem introduzir novos graus de liberdade ao problema. Por fim, a formulação foi implementada em um código computacional fundamentado no método dos elementos finitos com estrutura baseada em posições, o que permite a consideração dos efeitos associados à não linearidade geométrica na evolução do dano.
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