Frictional Behavior of Chestnut ( Castanea sativa Mill.) Sawn Timber for Carpentry and Mechanical Joints in Service Class 2

José Ramón Villar-García, Manuel Moya Ignacio, Pablo Vidal-López and Desirée Rodríguez-Robles ()
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José Ramón Villar-García: Forest Research Group, Department of Forest and Agricultural Engineering, Universitary Center of Plasencia, University of Extremadura, Av. Virgen del Puerto 2, 10600 Plasencia, Spain
Manuel Moya Ignacio: Forest Research Group, Department of Forest and Agricultural Engineering, Universitary Center of Plasencia, University of Extremadura, Av. Virgen del Puerto 2, 10600 Plasencia, Spain
Pablo Vidal-López: Mechanical and Fluid Engineering Research Group, Department of Forest and Agricultural Engineering, School of Agricultural Engineering, University of Extremadura, Av. Adolfo Suarez s/n, 06071 Badajoz, Spain
Desirée Rodríguez-Robles: Mechanical and Fluid Engineering Research Group, Department of Forest and Agricultural Engineering, School of Agricultural Engineering, University of Extremadura, Av. Adolfo Suarez s/n, 06071 Badajoz, Spain

Sustainability, 2024, vol. 16, issue 10, 1-17

Abstract: Wood is poised to become a material of choice for future construction. When appropriately managed, it is a renewable material with unique mechanical properties. Thus, there has been a growing demand for hardwoods, including Castanea sativa Mill., the focal point of this investigation, for structural applications. Albeit in a limited capacity, Eurocode 5-2 offers friction coefficients for softwoods, but it falls short for hardwoods. These coefficients play a critical role in numerical simulations involving friction, enabling the optimization of joints and, by extension, the overall structural integrity. Test samples were evaluated at 15% and 18% moisture content (Service Class 2) for various orientations of timber-to-timber and timber-to-steel friction. The results provide an experimental database for numerical simulations and highlight the influence of moisture on the stick–slip phenomenon, which was absent for the timber-to-timber tests, as well as on the rising friction values. At 18%, the static and kinetic coefficients were 0.70 and 0.48 for timber-to-timber and 0.5 and 0.50 for timber-to-steel. The increase was around 50% for timber-to-timber friction and over 170% for timber-to-steel pairs. Moreover, the findings proved a relationship between both coefficients and the validity of the linear estimation approach within the 12–18% moisture commonly applied to softwoods.

Keywords: friction coefficient; tribology; mechanical properties; contact simulation; Eurocode 5 (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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