Banca de QUALIFICAÇÃO: RENAN BUENO WOJCIECHOWSKI

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : RENAN BUENO WOJCIECHOWSKI
DATE: 07/01/2022
TIME: 14:00
LOCAL: REMOTA
TITLE:

Validation of the 3D finite element model/block method for laminating flat products

KEY WORDS:

Cold rolling. Thin sheets. Set of cylinders. Simulation. Validation

PAGES: 138
BIG AREA: Engenharias
AREA: Engenharia Mecânica
SUMMARY:

he advancement of current technology for laminating flat products is linked, among other factors, to the production of thin sheets without flatness defects. For this, it is essential to use models that can predict the process, and thus help to enable and optimize production. The existing ones provide accurate and diverse results, but they take a lot of time to implement and execute the calculations. In contrast, the 3D Finite Element/Blocks Method model (hybrid model) demonstrated, for only a single experimental case, to obtain similar responses faster. In his methodology, the distribution of the load generated due to the forming of the metal is calculated by a three-dimensional formulation of Bland Ford with the corrected radius of Hitchcook to be then applied in a static simulation in Finite Elements that aims to calculate the thickness profile of the sheet that exits the equipment. The results include, among others, stress fields, strains and contact pressures. This work proposes to further test the validity of the hybrid model, applying it in a new simulation in which input data were obtained experimentally for a 4-HIGH cold rolling mill that produces a plate with a final thickness of 0.288 mm . The following characteristics of the results will be evaluated in their respective ways: accuracy, comparing the calculated and measured sheet thickness profile; consistency and low time for calculation, by performing a sensitivity analysis; adequacy of inherent considerations, through their enumeration and validity tests for the case studied. To achieve these goals, the hybrid model algorithm will be improved in several ways, among which the compatibility with non-symmetry in the plate plane stands out. These modifications will be registered in the operation manual. Preliminary results demonstrate accuracy, low calculation time (14 min) and are based on valid considerations.

BANKING MEMBERS:
Interno - JOSE LEONCIO FONSECA DE SOUZA
Interno - WAGNER SADE
Presidente - YUKIO SHIGAKI