Multi-mode failure of form-fitting timber connections – Experimental and numerical studies on the tapered tenon joint

Koch, Heiko; Eisenhut, Lars; Seim, Werner

doi:10.1016/j.engstruct.2012.12.002

Cited by 33 publications

(22 citation statements)

References 4 publications

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“…McKenzie and Karpovich (1968) provided a static coefficient of friction of 0.6 and a kinetic one of 0.45 without specifying either directions or species, which would result in higher values than those obtained here. In addition, the values provided here were within the range suggested by Koch et al (2013) for dry spruce: 0.3 to 0.8 for μ s and 0.3 to 0.6 for μ k .…”

Section: Ta B L E 4 Coefficients For Friction Between Transverse Cutsupporting

confidence: 83%

“…While for cuts perpendicular to the fibre and oak timber, Kollmann (1959) provided values of 0.54 and 0.34 for μ s and μ k (Table 2), which are similar to those values obtained here. Koch et al (2013) provided values of 0.45 for μ s for surfaces perpendicular to the fibre rubbing against surfaces at 45º for spruce, which may be related to a certain affinity with the surfaces that this point refers to, thus observing that the value provided herein is similar. Finally, for softwoods in general and moisture contents lower or equal than 12%, with friction perpendicular to the fibre, the Standard Eurocode 5-Part 2: Bridges (CEN EN 1995-2:2016) states a design value for the static coefficient of 0.30 (Table 1), which may be considered as a conservative value.…”

Section: Ta B L E 8 Friction Coefficients Between Tangential Surfacementioning

confidence: 60%

“…The presence of friction is also significant in timber couplings, pulleys or bearings for conveyor belts, rolling mills and other kinetic systems in agroindustrial facilities and farm equipment. Several works (Villar et al, 2007(Villar et al, , 2008(Villar et al, , 2018(Villar et al, , 2019Koch et al, 2013;Aira et al, 2016) show the importance of knowing these coefficients in order to obtain both a deeper knowledge of the load transmission mechanisms and a suitable numerical simulation in timber joints. This is because load transmission is partially caused by friction forces, especially in the case of carpentry joints.…”

Section: Introductionmentioning

confidence: 99%

“…Aira et al (2014) also studied radial surfaces and the sliding parallel to the grain for Scots pine, obtaining a value of 0.12 for µ s and 0.08 for m k , and values of 0.24 for µ s and 0.17 for µ k , for transverse surfaces with a tangential sliding direction. Finally, Koch et al (2013) stated that the range of values for the static friction of dry spruce ranged between 0.3 and 0.8, while it ranged between 0.3 to 0.6 for the kinetic friction coefficient. When this author studied a tapered tenon joint, he considered a value of 0.45 for the static coefficient of friction in cuts perpendicular to the fibre against cuts at 45º to the fibre, and 0.4 for cuts at 45º with the grain frictioning against cuts parallel to the fibre.…”

Section: Introductionmentioning

confidence: 99%

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Determination of the friction coefficients of chestnut (Castanea sativa Mill.) sawn timber

et al. 2020

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A b s t r a c t. This work provides the values of both the static and the kinetic friction coefficients for chestnut (Castanea sativa Mill.) of Spanish origin. Knowledge concerning 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 anisotropy of the timber. A good correlation was obtained between both coefficients, thus allowing for the estimation of the kinetic coefficient from the static one.K e y w o r d s: wood, mechanical properties, friction coefficient, direct shear test

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Section: Ta B L E 4 Coefficients For Friction Between Transverse Cutsupporting

confidence: 83%

Section: Ta B L E 8 Friction Coefficients Between Tangential Surfacementioning

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Determination of the friction coefficients of chestnut (Castanea sativa Mill.) sawn timber

et al. 2020

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show abstract

“…Each part (i) or (i 0 ) of the surfaces in contact is checked in compression at an angle to the grain. Kock et al have developed guidelines for design that are suitable for skewed tenon joints, under axial and shear loading [28].…”

Section: Tenon Jointsmentioning

confidence: 99%