Stephen Hedan

TL;DR: In this article, an improvement of the digital image correlation (DIC) procedure was proposed to solve the uncertainty problems at the vicinity of the junction of two cracks, which was used to perform an evaluation of the displacement when multiple cracks are present in the subset.

TL;DR: In this article, the active species responsible for catalyst regeneration are the short-lived oxygenated species and not ozone, and a simple way to increase their concentration consists to substitute N2 by a noble gas as He.

TL;DR: In this paper, a set of samples taken from the Tournemire site was submitted to a desaturation process in an oven at different temperature levels of 40, 50, 60, 80, 90, 105, 120, 150, and 200°C.

TL;DR: In this article, the authors used a digital image correlation (DIC) method to monitor desiccation cracks during an annual climatic cycle, and the results demonstrate the ability of the non-invasive DIC technique to monitor clay-rock strains for at least four months and to monitor the opening and closing of cracks for more than one year.

TL;DR: In this paper, the authors compared and discussed the values of desiccation cracks at different scales (micrometer to decimeter) and found that cracks at the macroscopic scale (centimeter) exhibit a phase of opening and closure, followed by gradual closure, and finally, a final phase in which the cracks closed.