A methodology for high resolution digital image correlation in high temperature experiments

Abstract

We propose a methodology for performing high resolution Digital Image Correlation (DIC) analysis during high-temperature mechanical tests. Specifically, we describe a technique for producing a stable, high-quality pattern on metal surfaces along with a simple optical system that uses a visible-range camera and a long-range microscope. The results are analyzed with a high-quality open-source DIC software developed by us. Using the proposed technique, we successfully acquired high-resolution strain maps of the crack tip field in a nickel superalloy sample at 1000 °C.

Experimental evaluation of neural probe's insertion induced injury based on digital image correlation method

“…As the results are in good agreement with the commercial software -2, Ncorr has become a reliable DIC program used by various applications. 16,17…”

Optical imaging of surface strain distribution up to 1500°C: Development of micro‐speckle pattern

“…This article is protected by copyright. All rights reserved spraying particles, e.g., Ti (tested at 650-800 ℃) 13 , Au (tested at ~700 ℃) 14 , amorphous silica and TiO 2 8 , and CoO (tested at 1100 ℃) 15,16 , however, usability of these materials is limited below 1200 ℃ 17 . Tungsten coatings deposited by atmospheric plasma spraying (APS)were also used to improve the thermal stability of speckle patterns 18,19 .…”

Impact Modelling and A Posteriori Non-destructive Evaluation of Homogeneous Particleboards of Sugarcane Bagasse

“…Subsequently, the DIC parameters were selected [36]. Among the parameters to be chosen, there are: the default values in relation to the size of the input images.…”

“…The present work makes a significant progress in the research field of the mechanical impact, since it addresses the prediction of the damage in homogeneous particleboards of SCB by using numerical simulations carried out using the Comsol Multiphysics ® 5.0 software [34] along with the application of a very recent software, named Ncorr v.1.2 [35], which is able to analyse speckle patterns via a digital image correlation (DIC) technique [36]. In addition, the use of the laser spot and laser line thermography (LStT -LLT) methods [37], [38], combined with the well-known flash and square pulse thermography (FT -SPT) methods [39], [40], revealed unsuspected defects via image processing around the point of impacts.…”