Digital Image Correlation Employing Thermal Marking

Abstract

Digital image correlation (DIC) is a widely used technique that makes it possible to obtain full field displacements, as well as 3D shapes, even at high speeds. However, it requires a pattern of random spots to be sprayed onto the surface, which would be a major drawback in some applications, such as biomechanical studies. In this work, a new methodology (DIC) is presented by means of thermal marking to carry out mechanical analysis, obtaining data of interest such as deformations and displacements. Two types of tests were carried out. In the first, 2D DIC was used to evaluate the displacement of a rigid solid and thus validate the technique. In the second, 3D DIC was used in different parts of the human body, in, among others, the face, hand and arm to demonstrate the potential of the technique.

Keywords

• digital image correlation
• infrared vision
• biomechanics