Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
MULTI-MATERIAL TOPOLOGY OPTIMIZATION WITH STRESS CONSTRAINTS
Submission Author:
Rodrigo Reis Amaral , RS
Co-Authors:
Rodrigo Reis Amaral, Herbert Gomes
Presenter: Rodrigo Reis Amaral
doi://10.26678/ABCM.COBEM2021.COB2021-0435
Abstract
Designing engineering systems can be a complex process. Assumptions must be made to develop realistic models that can be subjected to mathematical analysis by the available methods. Structural optimization is a fusion in the areas of engineering, mathematics, science, and technology that has the objective to achieve the best performance for a structure. In this article, a linear analysis of a topologically optimized beam that uses concrete and steel in its composition will be presented. For this, a topological optimization procedure will be developed using the method Evolutionary Structural Optimization for problems that maximize the compliance of the structure. Failure criteria, such as that of Ottersen and von Mises, will be used for concrete and steel, respectively. With the criteria defined, it is possible to indicate which portion of the material is inefficient in parts of the structure, i. e., ideally, the stress in every part of the structure should be close to the same safe level. This concept leads to a rejection criterion based on the local stress level, where the low-stressed material is considered under-utilized. Regarding the numerical results, new topologies of beam structure using two nonzero materials and with void and two nonzero materials are presented.
Keywords
Reinforced concrete structure, Heterogeneous structure, Stress-based topology optimization
