Shear Strength of Wood Linear Friction Welded Joints: Experimental Study and Numerical Analysis

Abstract

Wood linear friction welding can be regarded as an environment-friendly and efficient wood connection technology. In this study, the welding depth, instead of welding time, was selected to control the whole welding process. The combination of welding amplitude of 1.7 mm, welding depth of 0.8 mm and welding pressure of 8 MPa was shown to be optimal by orthogonal experiments. Then the single factor tests were carried out to study the influence of welding amplitude, welding depth, and welding pressure on the shear strength of the welded joints. Finally, the effect of joint form and lap length on shear strength of welded joints was simulated and predicted with Cohesive Zone Models (CZM). It was found that the double lap joint had the greatest maximum shear strength compared with other three kinds of joints and shear strength of double lap joints would be enhanced with the increase of lap length almost linearly from 5 to 25 mm.