Abstract
The aim of this study is to build a new numerical model of a mortise-and-tenon joint based on the finite element method (FEM) considering glue line and friction coefficient to analyze the semi-rigid wood joint. Firstly, the friction coefficient, glue distributions and strengths of the mortise-and-tenon joint were determined by experimental methods. Secondly, these parameters were specified to a T-shaped mortise-and-tenon joint model to build a finite element model of joint by FEM. Finally, both withdrawal and bending load capacity of T-shaped specimens were investigated by experimental and numerical methods. The results showed that the testing methods used to determine the coefficient, distributions and strengths of the glued mortise-and-tenon joint were all effective enough to determine the mechanical properties of the wood mortise-and-tenon joint, and the finite element model of joint can be applied to analyze the semi-rigid mortise-and-tenon joint with consistency beyond 85%. These methods and finite element models will contribute to the analysis of wood products and wood constructions.
Highlights
Mortise-and-tenon joint is widely used in wood products and wooden constructions engineering [1, 2]
The aim of this study was to further investigate the distributions of glue and friction coefficient of joint considering the real-time condition of joint by experimental methods, and build a finite element model of mortise-and-tenon joint based on the results determined by experiments
Friction coefficient of joint According to the testing method shown in Fig. 4, the friction coefficient was figured out by Eq 1
Summary
Mortise-and-tenon joint is widely used in wood products and wooden constructions engineering [1, 2]. It is well known that the joints are critical part of wood frameworks [3,4,5] It is a typical semi-rigid joint manufactured by wood. It was first introduced into stiffness evaluation of furniture joint by Eckelman [6]. With the development of computer technique, the finite element method (FEM) has been popular with engineers and applied to structure design of wooden constructions and wood products. A number of studies have focused on this topic, the methods of modeling a reasonable semi-rigid mortise-and-tenon joint by FEM has not been figured out
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