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Development of numerical models applied to probabilistic topological optimization analyses using the Boundary Element Method

Grant number: 12/24944-5
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): April 01, 2013
Effective date (End): March 31, 2017
Field of knowledge:Engineering - Civil Engineering - Structural Engineering
Principal Investigator:Edson Denner Leonel
Grantee:Hugo Luiz Oliveira
Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Associated scholarship(s):15/07931-5 - Development of numerical models for probabilistic topology optimization analysis using the boundary element method, BE.EP.DR


This research proposal aims the development of coupled models based on reliability and topological optimization algorithms and mechanical models constructed using the boundary element method (BEM). Traditionally, the design of structures is restricted to the study of the cost of manufacture, regardless its effective safety level. This method has demonstrated to be not accurate in several situations, because, in most of them, the growth of the failure rate may produce lost higher than the economies expected. A rational approach consists in calculate the cost of manufacture based on the probability of structural failure. In this regard, this research project aims the development of numerical models based on coupling mechanical and reliability models in order to perform structural analysis, where the failure scenarios be identified by BEM algebraic equations. The main result of these models is the probability of structural failure and the set of most probable values for the random variables considered. Structures composed by brittle and quasi brittle materials subjected to crack growth will be considered. On these numerical models, topological algorithms will be coupled, in order to determine the structural geometry which leads minimum consumption of material. In this last model, reliability algorithms will impose restrictions, based on safety, for topological optimization analysis. As a result, this model will determine the structural geometry which leads the minimum consumption of material taking into account the presence of initial cracks and a given safety level. Regarding this research project, the proponents aim at contributing with this important scientific domain, and the development of the numerical tools applicable in industry is one of the deals. (AU)

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Scientific publications
(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)
OLIVEIRA, HUGO LUIZ; CHATEAUNEUF, ALAA; LEONEL, EDSON DENNER. Boundary Element Method applied to decision-making problems involving geometric variabilities in topology optimization. Engineering Analysis with Boundary Elements, v. 85, p. 116-126, . (12/24944-5, 15/07931-5)
OLIVEIRA, HUGO LUIZ; CHATEAUNEUF, ALAA; LEONEL, EDSON DENNER. Probabilistic mechanical modelling of concrete creep based on the boundary element method. ADVANCES IN STRUCTURAL ENGINEERING, v. 22, n. 2, p. 337-348, . (12/24944-5, 15/07931-5)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
OLIVEIRA, Hugo Luiz. Numerical models applied to the analysis of linear viscoelasticity and probabilistic topology optimization of two-dimensional structures: a Boundary Element Method approach. 2017. Doctoral Thesis - Universidade de São Paulo (USP). Escola de Engenharia de São Carlos (EESC/SBD) São Carlos.

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