Digital Image Correlation (DIC) techniques can be used to visually map and measure strain in materials such as metals metallic alloys. The induced an American Society for Testing Materials (ASTMs) standard specimen measured using a DIC technique. patterns indicating the localized variations function of time constant load applied were also obtained. Results obtained technique more accurate compa...

This work presents theoretical background on a novel class of strain sensor patterns. A combination of morphological image processing and Fourier analysis is used to characterize gray-scale images, according to specific criteria, and to synthesize patterns that score particularly well on these criteria. The criteria are designed to evaluate, with a single digital image of a pattern, the suitabi...

In this paper, the use of the Genetic Algorithm (GA) optimization method for measuring displacement fields with the Digital Image Correlation (DIC) technique is investigated. The conventional kinematic description of deformations within a subset are restricted to constant displacements along with constant first or second order displacement gradients throughout the subset, which effectively acts...

The computational burden associated to finite element based digital image correlation methods is mostly due to the inversion of finite element systems and to image interpolations. A non-overlapping dual domain decomposition method is here proposed to rationalize the computational cost of high resolution finite element digital image correlation measurements when dealing with large images. It con...

The first and second mode stress intensity factors (SIFs) of a contact problem between a half-plane with an edge crack and an asymmetric tilted wedge were obtained using experimental method of Digital Image Correlation (DIC). In this technique, displacement and strain fields can be measured using two digital images of the same sample at different stages of loading. However, several images were ...

In digital image correlation (DIC), to obtain the displacements of each point of interest, a correlation criterion must be predefined to evaluate the similarity between the reference subset and the target subset. The correlation criterion is of fundamental importance in DIC, and various correlation criteria have been designed and used in literature. However, little research has been carried out...

Dwayne D. Arola University of Maryland Baltimore County Department of Mechanical Engineering Baltimore, Maryland 21250 Abstract. We conduct displacement/strain measurements on the microscale using light microscopy and digital image correlation DIC . Errors in the measurements attributed to the optical arrangement and aberration induced at high magnification are identified using a warping functi...

A series of tests have been conducted to investigate fatigue damage characterization in corroded welded steel plates using structural health monitoring (SHM) techniques. Acoustic Emission (AE) is a non-destructive testing (NDT) technique with potential applications for locating and monitoring fatigue cracks in service. In the present work, AE is implemented to characterize damage during crack e...

The introduction of digital image correlation (DIC) techniques has opened the way for studying full-field kinematics (either displacement or strain) of complex structures using low-cost optical measurements [1]. By choosing a subset in the reference image, DIC searches for the most similar subset in the deformed image according to certain correlation criterion [2]. These techniques result in a ...

Digital image correlation (DIC) is expanding in many fields. In particular, it requires that the acquisition conditions and speckle be adapted to each application. A new methodology allowing define quality of images a fast precise way proposed. An analytical model based on mean intensity gradient pattern criterion standard deviation displacement has been The can used whole or by creating subset...