Schwarzites and schwarzynes based load-bear resistant 3D printed hierarchical structures

Author(s)

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

• Document type: Journal article
• Source: ADDITIVE MANUFACTURING; v. 60, p. 12-pg., 2022-10-13.

Abstract

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)

• FAPESP's process: 19/07157-9 - DESIGNING NEW 3D STRUCTURES FROM ZEOLITE TEMPLATES FOR 3D PRINTING APPLICATIONS
• Grantee: Eliezer Fernando de Oliveira
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• FAPESP's process: 13/08293-7 - CCES - Center for Computational Engineering and Sciences
• Grantee: Munir Salomao Skaf
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 16/18499-0 - Investigation on the structural, mechanical and functional properties of carbon-based nanostructures
• Grantee: Eliezer Fernando de Oliveira
• Support Opportunities: Scholarships in Brazil - Post-Doctoral