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Advances on mode I fracture testing in brittle and quasi-brittle materials with x-ray tomography

DOI: 10.1063/12.0000931 DOI Help

Authors: Antoine Cornet (University of Manchester Harwell Campus) , David S. Eastwood (University of Manchester Harwell Campus) , Neil K. Bourne (University of Manchester Harwell Campus) , Paul M. Mummery (University of Manchester Harwell Campus) , Carl M. Cady (Los Alamos National Laboratory) , Christoph Rau (Diamond Light Source)
Co-authored by industrial partner: No

Type: Conference Paper
Conference: Shock Compression of Condensed Matter - 2019
Peer Reviewed: No

State: Published (Approved)
Published: November 2020
Diamond Proposal Number(s): 19560

Open Access Open Access

Abstract: Through the case study of nuclear graphite, we show how x-ray computed tomography and Digital Volume Correlation enable quantitative monitoring of plasticity development in-situ in volume during material failure. Using a specific sample test geometry particularly suited for x-ray tomography, we applied Digital Volume Correlation to extract the strain field. Application of an experimentally derived threshold is used to distinguish between elastic’s and plastic strains around the crack tip, which allow the monitoring of the extension of the fracture process zone during crack propagation. Moreover, dynamic experiments with a time resolution up to the millisecond are now feasible using a recently suggested combination of X-ray computed tomography and Digital Volume Correlation.

Journal Keywords: Carbon based materials; Tomography; Educational assessment

Subject Areas: Materials, Engineering


Instruments: I13-2-Diamond Manchester Imaging

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12.0000931.pdf

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