Estimativa de Tensão a partir do Campo de Deslocamentos e Deformações utilizando a Técnica de Correlação de Imagem Digital (DIC)

Doi: 10.47094/COBRAMSEG2024/794

PALAVRAS CHAVE: Digital Image Correlation, Ensaio não destrutivo, Análise de tensões, Arenito da Formação Botucatu.

KEYWORDS: Digital Image Correlation, Non-destructive testing, Stress analysis, Botucatu Formation Sandstone.

ABSTRACT:
The Digital Image Correlation or Digital Image Correlation – DIC technique consists of an optical method that tracks the movement of a certain object or area through algorithms that seek to investigate the changes between images after a certain event, whether on a microscopic or macroscopic scale. From the captured image, the area of interest is defined to obtain the subsets (subsets), after selection, the calculation of displacements is carried out using specific software, correlating the subsets of a reference image with the subsets of the following images and, through these displacements, the deformations are calculated. The purpose of this article is to explore the DIC technique in carrying out the Simple Uniaxial Compression test on the Open Sandstone of the Botucatu Formation to perform stress retroanalysis, obtaining the displacement fields and, consequently, the deformations and, in this way, predicting the applied stresses to the material. The results obtained were less accurate than expected because the deformations were very small in relation to the area of study of the specimen, thus preventing the estimation of stress.

Autores

• Alexandr Khemchuzhnikov

• Júlio de Oliveira França Barbosa

• Marina Bellaver Corte

• Raquel Quadros Velloso