Banca de QUALIFICAÇÃO: Rafael Alan de Sa

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : Rafael Alan de Sa
DATE: 11/08/2023
TIME: 14:00
LOCAL: TEAMS
TITLE:

DETECTION AND QUANTIFICATION OF CRACKS IN 2D STRUCTURES, USING THE WAVELET TRANSFORM AND THE BOUNDARY ELEMENTS METHOD.

KEY WORDS:

Boundary elements; Wavelet Transforms; Damage detection, BEMcracker2d.

PAGES: 35
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Estruturas
SPECIALTY: Mecânica das Estruturas
SUMMARY:

Detecting damages in structures is of paramount importance as they can lead to the collapse of structural elements. In the current scenario, two reliable techniques for non-destructive testing of structures, namely ultrasound and X-rays, are practically applicable for precise localization of hidden damages. However, such techniques are costly, time-consuming, and require special procedures to be performed. Currently, research suggests the possibility of using numerical methods to assist in damage detection in structures. Generally, numerical methods for damage detection, such as cracks, are based on finite element modeling and comparisons between the signatures or responses of the structures before and after the occurrence of damage. This article proposes a new approach to damage identification based on the Wavelet Transform (WT) and the Boundary Element Method (BEM), making the numerical modeling of structures more accurate, straightforward, and without requiring the structure's signature before the damage occurs. To validate the adopted methodology, a cantilever beam containing a crack with different orientations will be modeled using the in-house programs BEMLAB and BEMCRACKER2D, as well as the algorithms implemented in MATLAB for handling wavelet coefficients and damage localization. The obtained results indicate that WT is a useful tool for identifying and monitoring damages in structures.

COMMITTEE MEMBERS:
Presidente - 1439182 - GILBERTO GOMES
Interno - 1825564 - RAUL DARIO DURAND FARFAN
Externo à Instituição - BRUNNO EMIDIO SOBRINHO