Determination of the friction coefficients of chestnut (Castanea sativa Mill.) sawn timber
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Department of Forest and Agricultural Engineering, University of Extremadura, Spain
Final revision date: 2019-06-20
Acceptance date: 2019-09-11
Publication date: 2020-01-14
Corresponding author
José Ramón Villar-García   

Department of Forest and Agricultural Engineering, University of Extremadura, University Centre, Avda. Virgen del Puerto, 2, 10600, Plasencia, Spain
Int. Agrophys. 2020, 34(1): 65-77
This work provides the values of both the static and the kinetic friction coefficients for chestnut (Castanea sativa Mill.) of Spanish origin. The knowledge of these coefficients has its main application in the study of agroindustrial structures and machinery with timber members in contact. This determination was developed taking into account the timber anisotropy to establish surfaces and directions of slipping. A modified direct shear test device was used to conduct the tests and reproduce the tribological system. This procedure was functional and reliable and considered suitable for standardizing the friction measurement between timber surfaces, since this device is widely distributed in geotechnical and materials laboratories and the European codes do not specify a procedure or device to carry it out. The average values obtained were 0.46 for the static coefficient and 0.33 for the kinetic one, without considering the surfaces and directions of slipping. These values ranged between 0.36 and 0.55 for the static friction coefficient and between 0.28 and 0.39 for the kinetic friction coefficient depending on the direction considered and also taking into account the the timber anisotropy. A good correlation was obtained between both coefficients, thus estimating the kinetic coefficient from the static one.
Aira J.R., Arriaga F., Iniguez-Gonzalez G., and Crespo J., 2014. Static and kinetic friction coefficients of Scots pine (Pinus sylvestris L.), parallel and perpendicular to grain direction. Mater. Constr., 64(315).
Aira J.R., Íñiguez-González G., Guaita M., and Arriaga F., 2016. Load carrying capacity of halved and tabled tenoned timber scarf joint. Mater. Struct., 49(12), 5343-5355.
Argüelles R., Arriaga F., Esteban M., Iñíguez G., and Argüelles Bustillo R., 2013. Timber Structures. Basis for Calculation (in Spanish). AITIM. Technical Research Association of the Wood and Cork Industries, Madrid, Spain.
ASTM G115-10(2018), 2018. Standard Guide for Measuring and Reporting Friction Coefficients. Am. Soc. Testing Materials, West Conshohocken, PA, USA.
Bejo L., Lang E.M., and Fodor T., 2000. Friction coefficients of wood-based structural composites. For. Prod. J., 50(3), 39-43.
CEN EN 1995-1-1:2016, 2016. Eurocode 5: Design of timber structures – Part. 1.1 General. Common rules and rules for buildings. European Committee for Standardisation, Brussels, Belgium.
CEN EN 1995-2:2016, 2016. Eurocode 5: Design of timber structures – Part. 2. Bridges. European Committee for Standardisation, Brussels, Belgium.
CEN EN 408:2011+A1 2012, 2012. Timber structures - Structural timber and glued laminated timber - Determination of some physical and mechanical properties. European Committee for Standardization, Brussels, Belgium.
Crespo J., Regueira R., Soilan A., Díez M.R., and Guaita M., 2011. Methodology to determine the coefficients of both static and dynamic friction apply to different species of wood. In: Proc. 1st Ibero-Latin American Congr. Wood in Construction. CIMAD 11, June 7-9, Coimbra, Portugal.
Keller F.J., Gettys W.E., and Skove M.J., 1993. Physics, classical and modern. McGraw-Hill, New York, USA.
Koch H., Eisenhut L., and Seim W., 2013. Multi-mode failure of form-fitting timber connections – Experimental and numerical studies on the tapered tenon joint. Eng. Struct., 48, 727-738.
Kollmann F., 1959. Wood technology and its applications. Forestry Institute for Research, Experiences and Wood Service. Department of Agriculture, Madrid, Spain.
McKenzie W.M. and Karpovich H., 1968. The frictional behaviour of wood. Wood Sci. Technol., 2(2), 139-152.
Molenda M., Stasiak M., Moya M., Ramirez A., Horabik J., and Ayuga F., 2006. Testing mechanical properties of food powders in two laboratories – degree of consistency of results. Int. Agrophysics, 20, 37-45.
Moya M., Aguado P.J., and Ayuga F., 2013. Mechanical properties of some granular agricultural materials used in silo design. Int. Agrophys, 27(2), 181-193.
Serway R.A. and Jewett J.W., 2013. Physics for Scientists and Engineers with Modern Physics. Cengage Learning, New York, USA.
Soilán A., Arriaga F., Baño V., Crespo J., and Guaita M., 2011. Analysis of the behavior of the dovetail connection by numerical simulation with the finite element method., in: Proceeding of the 1er Ibero-Latin American Congress on Wood in Construction. CIMAD 11, June 7-9, Coimbra, Portugal.
Tipler P.A., 2008. Physics for scientists and engineers. W.H. Freeman-Worth, 1999 4th ed., New York, USA.
USDA Forest Products Laboratory, 2010. Wood handbook: wood as an engineering material. General Technical Report FPL-GTR-190. Madison, WI, USA.
Villar J.R., Guaita M., Vidal P., and Argüelles R., 2008. Numerical simulation of framed joints in sawn-timber roof trusses. Spanish J. Agric. Res., 6(4), 508-520.
Villar J.R., Guaita M., Vidal P., and Arriaga F., 2007. Analysis of the stress state at the cogging joint in timber structures. Biosyst. Eng., 96(1), 79-90.
Villar-García J.R., Crespo J., Moya M., and Guaita M., 2018. Experimental and numerical studies of the stress state at the reverse step joint in heavy timber trusses. Mater. Struct., 51(1), 17.
Villar-García J.R., Vidal-López P., Crespo J., and Guaita M., 2019. Analysis of the stress state at the double-step joint in heavy timber structures. Mater. Constr., 69(335), e196.
Young H.D. and Freedman R.A., 2016. University Physics with Modern Physics. Pearson Education, San Francisco, USA.
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