Autor(es)

Oliveira, Eliezer F. ; Ambekar, Rushikesh S. ; Galvao, Douglas S. ; Tiwary, Chandra S.

• Tipo de documento: Artigo Científico
• Fonte: ADDITIVE MANUFACTURING; v. 60, p. 12-pg., 2022-10-13.

Resumo

The unique topological features, such as complex and hierarchical porosity exhibited in nature have been the basis to create new materials and/or structures. Most studies have been focused on regular porous structures but hierarchical porous ones have not been yet fully investigated for stable structural designs. In this work, we have proposed and tested a new approach to create hierarchical porous structures, in which the mass density varies from the center to the borders, i.e, a radial gradient. To create these new structures we exploited the topology of two carbon-based families with different pore sizes, the schwarzites, and schwarzynes. We created fully atomistic models that were translated into macroscale ones that were then 3D printed. The mechanical behavior of the gradient structures was investigated by molecular dynamics simulations and mechanical compression tests of the printed models. Our results show that their mechanical response can be engineered (for instance, in terms of energy absorption, ballistic performance, etc.) and can outperform their corresponding density uniform structures. (AU)

• Processo FAPESP: 19/07157-9 - Projetando novas estruturas 3d a partir de modelos de zeólitas para aplicações em impressão 3d
• Beneficiário: Eliezer Fernando de Oliveira
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 13/08293-7 - CECC - Centro de Engenharia e Ciências Computacionais
• Beneficiário: Munir Salomao Skaf
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 16/18499-0 - Investigação de propriedades estruturais, mecânicas e funcionais de nanoestruturas de carbono
• Beneficiário: Eliezer Fernando de Oliveira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado