Abstract
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.
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Acknowledgments
The authors wish to thank Saint-Gobain Recherche for supporting this research project, and particularly René Gy for insightful discussions. AB is also financially supported by ANRT through contract no. 2010/567. The authors would also like to thank Dr. S. Meille for helpful discussions.
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Bouterf, A., Adrien, J., Maire, E. et al. Failure Mechanisms of Plasterboard in Nail Pull Test Determined by X-ray Microtomography and Digital Volume Correlation. Exp Mech 56, 1427–1437 (2016). https://doi.org/10.1007/s11340-016-0168-8
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DOI: https://doi.org/10.1007/s11340-016-0168-8