Banca de DEFESA: Pedro Filipe de Luna Cunha

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : Pedro Filipe de Luna Cunha
DATE: 12/06/2024
TIME: 14:00
LOCAL: Sala de interação CDT
TITLE:

THERMOMECHANICAL ANALYSIS USING ISOPARAMETRIC SHELL FINITE ELEMENTS

KEY WORDS:

 Finite Elements, thermomechanical analysis, shell elements, plasticity.

PAGES: 147
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Estruturas
SUMMARY:

This work introduces an integrated methodology for thermomechanical analysis, applying
specific isoparametric finite elements for shells. These elements are developed through direct
isoparametric formulation, aimed at both flat and curved shell elements, and are based on the
theory of degenerated solids. The constitutive model used for these elements is based on the
von Mises plasticity equations, utilizing Mandel notation to facilitate the effective
implementation of tensorial constitutive equations. The developed formulations are detailed
extensively, aiming for deep understanding and applicability in future research. The validation
of the proposed finite element is conducted through four examples from the literature that have
analytical solutions. For the coupled thermomechanical approach, validation and comparison
are done with another four examples, of which two have analytical solutions and two are
modeled using the Abaqus software. TThe verification of the constitutive model is conducted
through four additional examples: the first two are based on literature results, while the last two
are modeled in the Amaru software. In all scenarios, the results demonstrate good agreement
with the analytical solutions and with the data obtained through finite element software.
Concluding, two case studies are presented. The first case involves a numerical simulation of
experimental results for temperature and stress in a pressure vessel, while the second is a
hypothetical simulation examining a section of a flare, considering the thermomechanical
effect combined with material nonlinearity (plasticity). This analysis includes the verification
of von Mises stress along the length of the structure, under different temperature levels.

COMMITTEE MEMBERS:
Presidente - 1825564 - RAUL DARIO DURAND FARFAN
Interno - 404840 - WILLIAM TAYLOR MATIAS SILVA
Externo à Instituição - PAULO MARCELO VIEIRA RIBEIRO - UFPE
Externo à Instituição - ZENÓN JOSÉ GUZMÁN NÚÑEZ DEL PRADO - UFG