Name: Natan Sian das Neves
Type: MSc dissertation
Publication date: 16/12/2019
Advisor:

Namesort descending Role
Macksuel Soares de Azevedo Advisor *

Examining board:

Namesort descending Role
Elcio Cassimiro Alves Internal Examiner *
Macksuel Soares de Azevedo Advisor *
Rodrigo Silveira Camargo Co advisor *
Valdir Pignatta e Silva External Examiner *

Summary: Structural modeling of thermal effects has important practical applications in engineering,
corroborating the continuing interest of academic scientific research in the field. In particular,
since structural elements are subjected to high temperatures, the properties of the materials
used in the structures deteriorate with increasing temperature, resulting in a considerable loss
of strength and stiffness. Under these conditions, the structures present complex behaviors
associated to nonlinear mathematical models, requiring advanced calculus analysis. Thus,
current research aims to study the performance of structures under fire action. To this end,
a computational model called NASEN (Numerical Analysis Software for Engineering) was
developed, containing specific modules for physical engineering areas. For the characteristics of
the research, highlight, firstly, the module for thermal analysis in structures, WHERE the nonlinear
transient two-dimensional heat conduction is studied. Then, the module for thermo-structural
analysis is based on the solution of a coupling of sequential numerical processes, that is, the
temperature field at the cross-sectional level is first determined and, subsequently, the mechanical
response is obtained based the fiber model and nonlinear structural procedures. The numerical
experiments carried out during the research transited about problems of thermal and structural
nature, associated to the linear and nonlinear behaviors, well were tested different geometries,
boundary conditions and types of materials. The numerical experiments carried out during the
research transited about problems of thermal and structural nature, associated to the linear and
nonlinear behaviors, WHERE were tested different geometries, boundary conditions and types
of materials. In general, the results obtained with the computer simulations led to satisfactory
responses when compared to the experimental measurements, numerical or analytical solutions
available in the literature.

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