Banca de QUALIFICAÇÃO: JOSÉ HENRIQUE CRISMANIS TELES

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : JOSÉ HENRIQUE CRISMANIS TELES
DATA : 14/08/2019
HORA: 10:00
LOCAL: na Sala 24, Térreo, Bloco Delta, Campus SBC da Fundação Universidade Federal do ABC, localizada na Alameda da Universidade, s/n, Bairro Anchieta - São Bernardo do Campo, SP
TÍTULO:

Synthesis of Compliant Mechanisms with Large Displacements by Using Topology Optimization in Discrete Domains

PÁGINAS: 100
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Aeroespacial
SUBÁREA: Estruturas Aeroespaciais
ESPECIALIDADE: Projeto de Estruturas Aeroespaciais
RESUMO:

Compliant mechanisms perform certain functions from the elastic deformation of its body, thus avoiding the use of joints, pins and bearings. This avoids assembly and problems such as friction between components. Compliant mechanisms have great application in devices that involve precision mechanics due to their high precision due to the reduced wear and reduced clearances. In biomedical engineering, compliant mechanisms have great application in the design of surgical instruments, facilitating sterilization due to the reduced number of components. Due to its microscale application, compliant mechanisms can be used in the manufacture of MEMS (Micro Electro Mechanical Systems). Another possible application is in the manufacture of LEMS (Lamina Emergent Mechanisms), which are mechanisms made of flat materials with movement that emerges from its plan. In this work, the design of compliant mechanisms is also used to engineer a metamaterial, that is a structure designed to have extremal properties not found in naturally occurring materials. In this case the desired property is the negative Poisson's ratio, which defines the so called auxetic structure. The topology optimization (TO) method has been shown to be the most generic and systematic for the design of compliant mechanisms. It consists of a method that distributes material within a domain in order to achieve the specified objective function. In this work TO is performed in discretized domains in truss elements (ground structure), where the cross-sectional areas of the elements are the design variables. Large displacements are considered, which establishes a nonlinear relation between deformation and displacement and requires the use of nonlinear FEM. The objective of this work is to develop a methodology to design compliant mechanisms with large displacements by using discrete domains. The optimization problem is subject to volume constraint where the objective function is to maximize the displacement in a given region of the structure domain when subjected to a given load in another region. The results demonstrate that compliant mechanisms with large displacements can be designed by using this methodology.

MEMBROS DA BANCA:
Presidente - Interno ao Programa - 1604134 - CICERO RIBEIRO DE LIMA
Membro Titular - Examinador(a) Externo ao Programa - 1957691 - RONNY CALIXTO CARBONARI
Membro Titular - Examinador(a) Externo à Instituição - THADEU ALVES SENNE
Membro Suplente - Examinador(a) Externo ao Programa - 1544284 - LUIS ALBERTO MARTINEZ RIASCOS