Utilização da técnica de velocimetria por imagens de partículas (PIV) para obtenção do mapa de deformações em painéis de madeira de Pinus oocarpa

Abstract

Several conventional methodologies are able to characterize the materials, however, most of these techniques present problems such as the cost of equipment and tests, in addition to causing permanent damage to the specimens. In this context, there are alternatives to these techniques, among which are the non-destructive testing techniques, highlighting the technique of particle image velocimetry (PIV). The PIV technique measures variations in the position of an analysis region on an object from images captured during a loading session. The objective of this research was to analyze the displacements occurred on the surface of Pinus oocarpa wood panels, submitted to the static flexion test, through the construction of the deformation map. With the application of a linear regression between the deformation values obtained before the rupture of the specimens, it was found that the value of the coefficient of determination between the values derived from the PIV technique and the dial indicator was considerably satisfactory. It was concluded that it was possible to analyze the deformations that occurred on the surface of the specimens in a precise way, through the non-destructive technique.