Failure Mechanisms of Plasterboard in Nail Pull Test Determined by X-ray Microtomography and Digital Volume Correlation

• Published in: Experimental mechanics Vol. 56; no. 8; pp. 1427 - 1437
• Main Authors: Bouterf, A., Adrien, J., Maire, E., Brajer, X., Hild, F., Roux, S.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-10-2016; Springer Nature B.V; Society for Experimental Mechanics
• Subjects: Bearing strength; Biomedical Engineering and Bioengineering; Characterization and Evaluation of Materials; Compressive strength; Control; Design optimization; Drywall; Dynamical Systems; Engineering; Failure mechanisms; Kinematics; Lasers; Lightweight; Limiting factors; Load carrying capacity; Mechanics; Mechanics of materials; Optical Devices; Optics; Phenomenology; Photonics; Physics; Porosity; Roller coating; Solid Mechanics; Thermal resistance; Vibration; X ray microtomography; Digital volume correlation; X-ray tomography; Nail pull test; Lightweight plasterboard; lightweight plasterboard; nail pull test
• ISSN: 0014-4851; 1741-2765
• DOI: 10.1007/s11340-016-0168-8

To design lightweight plasterboard and optimize the compromise between thermal resistance and mechanical strength, it is important to characterize its strength as assessed with the normative “Nail pull” test. Understanding the phenomenology of this test is the key to identifying the limiting factor in terms of load carrying capacity. In this work, the degradation mechanisms of lightweight plasterboard are analyzed via tests conducted
in situ
in a laboratory tomograph. Through the analysis of the kinematics by digital volume correlation, the different mechanisms at play up to failure mechanism have been identified, i.e., quasi-elastic regime, failure of the roller coating layer, core compaction and core failure. The compaction of the core by the collapse of porosity in compression is recognized as the limiting factor in terms of compressive strength and tearing resistance.