Banca de QUALIFICAÇÃO: LUAN BERNARDO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : LUAN BERNARDO
DATA : 01/02/2019
HORA: 10:00
LOCAL: Sala de Pós PPGCEM, bloco 11, 2 andar.
TÍTULO:

Development and Experimental Validation of Multiscale Numerical Model for Predicting Flow Behavior of Dual Phase Steel Using RVE Method

PALAVRAS-CHAVES:

Multiscale Material, RVE Method, Homogenization Theory, EBSD and Experimental Validation.

PÁGINAS: 48
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Mecânica
SUBÁREA: Mecânica dos Sólidos
ESPECIALIDADE: Mecânica dos Corpos Sólidos, Elásticos e Plásticos
RESUMO:

Dual phase steel (DP) has stood out in the class of Advanced High Strength Steels (AHSS), showing a viable alternative for reducing the emission of gases emitted by mobility vehicles, mainly combustion-fueled automotive vehicles. The DP steel is considered as a microcomposite equipped with biphasic microstructure composed of islands of hard and resistant martensite dispersed in the ductile and soft ferrite matrix, which confers the mechanical properties demanded by the designers of automobiles with accessible cost-benefit relations. Among these properties, the following stand out: high mechanical strength, considerable hardening capacity, continuous flow, uniform elongation, low flow yield, good conformability and considerable fracture toughness. This provides increased passenger safety even with structural weight reduction and consequently lower fuel consumption. Given the importance of DP steels, a multiscale numerical model was developed to determine the strain-strain behavior for different DP steels obtained by the application of distinct intercritical thermal cycles. The computational material model or design is based on the virtual Representative Volume Element (RVE) method generated in the FE module (Finite Element) of the Digimat software from information from the Backscattered Electron Diffraction (EBSD) technique. The applied elastoplastic constitutive equation is based on the displacement theory, making it possible to perform the uniaxial traction simulation on the Ansys Workbench numerical platform. The Homogenization Theory is then applied to convert the behavior of micro scale to macro, using a mechanical test of uniaxial traction for experimental validation.

MEMBROS DA BANCA:
Presidente - 2266607 - FABIO JOSE PINHEIRO SOUSA
Externo ao Programa - 1752508 - DANIEL NELSON MACIEL
Externo ao Programa - 1938946 - NICOLAU APOENA CASTRO