Stiffness Coefficients of Mortise and Tenon Joints used on Wooden Window Profiles

Abstract

Samples of corner joints of wooden rectangular windows, with widths of 78 and 92 mm, were used to determine the stiffness of tenon and mortise joints. Two series of samples were loaded statically in the angular plane of compression and tension, so that the bending moment could be derived. The objective of the experiment was to determine the existing correlations between the stiffness in maximum strength and the stiffness in the elastic area for both types of tests. After strength tests were carried out, the annual ring width of the samples was measured to determine whether this factor affects the stiffness of the joints. The results showed that there was a relatively strong correlation between the stiffness in the elastic area and the maximum load. A two-factor analysis of variance confirmed that the type of load did not affect the stiffness of the joint, but the type of joint (width) does significantly affect the stiffness. Therefore, the width of annual rings was positively correlated with the stiffness of the joints.

Effects of Geometric Parameters of Structural Elements on Joint Stiffness

“…The steel clamp that was used in the work of Podlena and Borůvka (2016) was also used hereto perform the experiment. Figure 6a shows the experimental testing of the corner joint and its mounting on the device.…”

“…The perpendicular corner joint is shown in black, whereas the deformed state is shown in purple. The change in distance was recorded between the pins of the device (L  L´), which was used to calculate the angle arcsin function ´ (Podlena and Borůvka 2016). The change in the angle between the joint rails in degrees was calculated using Eq.…”

Evaluation of corner joint strength of composite panels bonded with modified starch

“…Therefore, it is important to consider such forces so that raw material and finished products could be designed with an acceptable property (Eckelman and Rabiej 1985, doi:/10.37763/wr.1336-4561/65. 4.675686 Smardzewski 1993, Erdil et al 2005, Zhang et al 2005, Podlena and Borůvka 2016, Záborský et al 2017a. Wood and wood-based materials are important components of furniture design and furniture construction design.…”

Determination of the Bending Moment of a Dowel and Tenon Joint on Window Profile IV 92 of a Wooden Window

“…However, the values of the joints can also be measured in the elastic area, such as in Podlena and Borůvka (2016), wherein it was determined, when comparing profiles IV 78 and IV 92, that the values of stiffness from the elastic area (10% and 40%) correlate (0.69 to 0.84) to the values from the maximum stiffness. During the testing of the corner joints, the progressions of forces derived from the moving crosshead of the testing machines are recorded depending on the displacement.…”