| Full text | |
| Author(s): |
Azevedo, Anderson Soares da Costa
;
Li, Hao
;
Ishida, Naouyuki
;
Siqueira, Lucas Oliveira
;
Cortez, Romulo Luz
;
Silva, Emilio Carlos Nelli
;
Nishiwaki, Shinji
;
Picelli, Renato
Total Authors: 8
|
| Document type: | Journal article |
| Source: | INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING; v. 125, n. 13, p. 25-pg., 2024-03-26. |
| Abstract | |
Recent advancements in computational tools and additive manufacturing have expanded design possibilities on fluid devices and structures to also include aesthetics. However, traditional discrete density-based topology optimization methods usually use square and cubic regular meshes, resulting in jagged contour patterns that require mesh refinement and post-processing to numerical solution steps of complex physics problems. In this article, we propose a new isosurface boundary capture strategy for topology optimization in structural and fluid flow problems. The capture of smoothed boundaries is done via a simple strategy through element splitting and analysis domain remeshing. The smoothing procedure novelty lies on the optimizer regular mesh decomposition into smaller triangular or tetrahedral elements with a pseudo-density nodal function that produces implicit geometry boundaries. We employ the TOBS-GT (topology optimization of binary structures with geometry trimming) method to solve optimization problems for mean compliance and fluid flow energy dissipation, subject to a volume fraction constraint. Since, we perform discrete body-fitted optimization, the material interpolation models are expressed in linear form without penalty factors. Our method produces a lower computational cost topology evolution with high resolution and mitigated sharp details, achieved via smooth edges and surfaces, as demonstrated through benchmark numerical examples in two- and three-dimensional space. In addition, the proposed strategy facilitates the optimization of benchmark fluid flow examples for moderate Reynolds numbers. (AU) | |
| FAPESP's process: | 18/05797-8 - Addressing design challenges of offshore structures via Multiphysics topology optimization |
| Grantee: | Renato Picelli Sanches |
| Support Opportunities: | Research Grants - Young Investigators Grants |
| FAPESP's process: | 14/50279-4 - Brasil Research Centre for Gas Innovation |
| Grantee: | Julio Romano Meneghini |
| Support Opportunities: | Research Grants - Research Centers in Engineering Program |
| FAPESP's process: | 20/15230-5 - Research Centre for Greenhouse Gas Innovation - RCG2I |
| Grantee: | Julio Romano Meneghini |
| Support Opportunities: | Research Grants - Research Centers in Engineering Program |