Topology optimization of compliant mechanisms considering manufacturing uncertainties and stress failure criterion

• Grant number: 18/16701-1
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: March 01, 2019
• End date: December 12, 2021
• Field of knowledge: Engineering - Civil Engineering - Structural Engineering
• Principal Investigator: André Teófilo Beck
• Grantee: Gustavo Assis da Silva
• Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Associated scholarship(s): 19/08654-6 - Topology optimization of three-dimensional structures considering manufacturing uncertainties and stress failure criterion, BE.EP.PD

Abstract

This research project aims at proposing a formulation for topology optimization of manufacturing tolerant compliant mechanisms which respect a stress failure criterion. The proposed formulation follows the three-field density approach developed in Sigmund (2009) and Wang et al. (2011), first proposed for the design of manufacturing tolerant continuum structures. The novelty in this proposal comes from inclusion of a stress failure criterion, which is extremely important in several engineering applications. With this study, we intend to take a further step towards the design of compliant mechanisms that satisfy realistic engineering requirements, through the simultaneous consideration of manufacturing uncertainties and stress failure criterion. After implementing the formulation and analyzing the obtained results, we aim at extending the proposed formulation to include geometrically nonlinear behavior, in order to allow the design of the same components considering large displacements.

Scientific publications

(6)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

DA SILVA, GUSTAVO ASSIS; AAGE, NIELS; BECK, ANDRE TEOFILO; SIGMUND, OLE. ocal versus global stress constraint strategies in topology optimization: A comparative stud. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, v. 122, n. 21, JUL 2021. (18/16701-1)

DA SILVA, GUSTAVO ASSIS; CARDOSO, EDUARDO LENZ; BECK, ANDRE TEOFILO. Comparison of robust, reliability-based and non-probabilistic topology optimization under uncertain loads and stress constraints. PROBABILISTIC ENGINEERING MECHANICS, v. 59, JAN 2020. (18/16701-1)

DA SILVA, GUSTAVO ASSIS; BECK, ANDRE TEOFILO; SIGMUND, OLE. Topology optimization of compliant mechanisms considering stress constraints, manufacturing uncertainty and geometric nonlinearity. COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING, v. 365, JUN 15 2020. (19/08654-6, 18/16701-1)

DA SILVA, GUSTAVO ASSIS; AAGE, NIELS; BECK, ANDRE TEOFILO; SIGMUND, OLE. Three-dimensional manufacturing tolerant topology optimization with hundreds of millions of local stress constraints. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, v. 122, n. 2, p. 548-578, JAN 30 2021. (19/08654-6, 18/16701-1)

DA SILVA, GUSTAVO ASSIS; BECK, ANDRE TEOFILO; SIGMUND, OLE. Topology optimization of compliant mechanisms with stress constraints and manufacturing error robustness. COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING, v. 354, p. 397-421, SEP 1 2019. (18/16701-1)

DA SILVA, GUSTAVO ASSIS; BECK, ANDRE TEOFILO; SIGMUND, OLE. Structural topology optimization with predetermined breaking points. COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING, v. 400, p. 21-pg., 2022-10-01. (18/16701-1)