Study of the End-grain Butt Joints Obtained by Friction Welding of Moso Bamboo
Résumé
End-grain-to-end-grain welding has been the object of considerable study
in the authors’ laboratory, but successful experiments have been hindered
by wood defibration. End-grain butt joints obtained by friction welding with
moso bamboo showed relatively good experimental results compared to
beech, oak, and spruce. The average compression shear strength of the
welded joints reached 5.81 MPa, and the departure of the bamboo fibers
could not be observed during the welding process. A study of the
microstructure of the welded surface revealed that during the welding
process, hard vascular bundles within the fibers became prominent on the
welded surface and acted similarly to a brush. These bundles dissipated
lateral friction and protected the bamboo from cracking in the process