Qualification tests of adhesive systems, the assessment of the durability of glued wooden structures

Abstract

The question of the use of qualification tests of adhesive systems to determine their residual life is considered. The purpose of the study. Testing the hypothesis about the possibility of applying qualification tests of adhesive systems and regression equations to predict the residual life. Methods. Experimental studies of water resistance of adhesive joints, tensile strength along fibers, heat and frost resistance of adhesive joints, and resistance of adhesive joints to delamination were carried out. Results. Based on the test results, data were obtained on the water resistance of adhesive joints, the tensile strength along fibers, the heat and frost resistance of adhesive joints and the resistance of adhesive joints to delamination. The dependences of the limit on the strength of time are obtained. The residual life was calculated using the obtained equations. Discussion. Based on the studies, it was found that the qualification test data of adhesive systems can be used to determine their durability (residual life). In the future, the results of these studies can be applied for widespread implementation and for inclusion in regulatory documents.

Experimental Studies of Nodal Joints of Wooden Elements in Trusses and Geodesic Domes

“…The study was based on the science behind wood utilization as a structural material produced as a result of sawing tree trunks (Chernykh et al, 2020(Chernykh et al, , 2022. In the course of the study, we used analytical, experimental, and statistical methods to process the results of the strength tests involving new types of LVL joints in plane trusses and geodesic domes, performed in a laboratory environment.…”

“…LVL is made of high-density veneer, where all soft wood layers have fibers in longitudinal direction (Chernykh et al, 2020;Zhivotov, 2009b).…”

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“…The study was based on the science behind wood utilization as a structural material produced as a result of sawing tree trunks (Chernykh et al, 2020(Chernykh et al, , 2022. In the course of the study, we used analytical, experimental, and statistical methods to process the results of the strength tests involving new types of LVL joints in plane trusses and geodesic domes, performed in a laboratory environment.…”

“…LVL is made of high-density veneer, where all soft wood layers have fibers in longitudinal direction (Chernykh et al, 2020;Zhivotov, 2009b).…”