Neutron imaging for geomechanics: A review. (September 2021)

• Record Type: Journal Article
• Authors: Tengattini, Alessandro; Lenoir, Nicolas; Andò, Edward; Viggiani, Gioacchino
• Is Part Of: Geomechanics for energy and the environment. Volume 27(2021)
• Publication Date: 2021-09
• Subjects: Neutron imaging -- X-ray imaging -- Geomechanics -- Porous media -- Tomography -- Radiography; Engineering geology -- Periodicals; Power resources -- Periodicals; Energy development -- Technological innovations -- Periodicals; Engineering geology -- Environmental aspects -- Periodicals; Energy development -- Technological innovations; Engineering geology; Engineering geology -- Environmental aspects; Power resources; Geology -- Periodicals; Energy-Generating Resources -- Periodicals; Periodicals; Electronic journals; 621.042
• DOI: 10.1016/j.gete.2020.100206
• Languages: English
• ISSNs: 2352-3808

Abstract

Abstract: During the last few decades, a number of advanced experimental techniques have provided an unprecedented insight into the behaviour of geomaterials. A notable example are the so-called full-field techniques such as x-ray and neutron imaging, which allow the non destructive characterisation of the 4D (3D+time) response of geomaterials undergoing hydro–chemo–thermo-mechanical loading. While x-ray tomography has over the last decade become a pillar in the domain, neutron imaging remains a relatively less known tool. The unique properties of a neutron beam, such as high sensitivity to hydrogen ( e.g., water, hydrocarbons), high penetration into metals (allowing the imposition of extreme boundary conditions), and isotope sensitivity ( e.g., D 2 O/ H 2 O), make neutron imaging an extremely interesting tool for experimental geomechanics. This paper reviews the contribution of neutron imaging to geomechanics. A particular focus is given to the potential of some very recent developments, such as the combination with simultaneous x-rays and substantial improvements in spatial and temporal resolution. Highlights: Review Paper about the use of Neutron radiography and tomography in geomechanics. Outlines fundamentals and facilities for neutron imaging, comparing it to x-rays. Historical background, recent achievements and use for in-operando testing. Reviews recently developed simultaneous x-ray/neutron imaging, and its use.