Analysis of compaction in brittle foam with multiscale indentation tests. (March 2018)

• Record Type: Journal Article
• Authors: Bouterf, A.; Maire, E.; Roux, S.; Hild, F.; Brajer, X.; Gouillart, E.; Boller, E.
• Is Part Of: Mechanics of materials. Volume 118(2018:Mar.)
• Page Start: 22
• Page End: 30
• Publication Date: 2018-03
• Subjects: Digital volume correlation -- Lightweight plasterboard -- In-situ indentation test -- X-ray tomography; Strength of materials -- Periodicals; Mechanics, Applied -- Periodicals; Résistance des matériaux -- Périodiques; Mécanique appliquée -- Périodiques; Mechanics, Applied; Strength of materials; Periodicals; Electronic journals; 620.11
• DOI: 10.1016/j.mechmat.2017.12.004
• Languages: English
• ISSNs: 0167-6636

Abstract

Highlights: Spherical indentation experiments conducted on lightweight plasterboard in a lab tomograph and on the high resolution synchrotron. Compaction mechanism in brittle foam analyzed by X-Ray tomography and Digital Volume Correlation. Failure scenario of plasterboard in spherical indentation is proposed. Abstract: Lightweight plasterboard is a product composed of "plaster foam" core whose porosity can reach 75 vol%, lined with two sheets of paper. To optimize the trade-off between thermal resistance and mechanical strength, it is important to understand and characterize the mechanical behavior of plasterboard. Core compaction of plasterboard is one of the prevalent degradation mechanisms. This mechanism is studied herein using in-situ indentation experiments performed at two different scales. The first test was carried out in a lab tomograph. The second test was conducted on the high resolution synchrotron ID19 beamline at ESRF. Very early damage is revealed. The basic mechanism of pore collapse and its gradual development is detected in contrast with mesoscale observations where compaction appears very abrupt.