| Full text | |
| Author(s): |
Emmendoerfer Jr, Helio
;
Maute, Kurt
;
Fancello, Eduardo Alberto
;
Silva, Emilio Carlos Nelli
Total Authors: 4
|
| Document type: | Journal article |
| Source: | COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING; v. 391, p. 38-pg., 2022-01-22. |
| Abstract | |
This work presents a level set-based approach to design multi-material compliant mechanisms subject to local stress constraints. The inclusion of stress constraints can avoid non-realistic hinges formed by a single node or element often present in compliant mechanisms. This study proposes an optimization procedure capable of assigning multiple materials with distinct properties along the structure to obtain mechanisms that maximize the output displacement and satisfy stress constraints. For the level set topology description, the Multi-Material Level Set (MM-LS) model is adopted. Local stress constraints and volume constraints for the multiple material phases are included in the objective function via an augmented Lagrangian technique. The structural geometry is defined by an explicit level set method and the Ersatz material model. The proposed approach is presented in a generalized form that can be easily extended to any number of materials defined by the user. Two-dimensional numerical results demonstrate the efficacy of the proposed procedure. (c) 2022 Elsevier B.V. All rights reserved. (AU) | |
| 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: | 16/09923-2 - Labyrinth seals design using topology optimization based on a level set approach |
| Grantee: | Hélio Emmendoerfer Junior |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 18/21350-3 - Labyrinth Seals design using multi-material topology optimization based on a level set approach |
| Grantee: | Hélio Emmendoerfer Junior |
| Support Opportunities: | Scholarships abroad - Research Internship - Post-doctor |