Wood welding rotational of Brazilian native species

Abstract

Wood welding is a relatively new technique in Brazil, especially when using native wood species. This research aims to determine the shear strength of joints made using the friction stir welding process with two native Brazilian species: Hymenaea courbaril L. (jatobá) and Trattinnickia burserifolia Mart. (amescla). Ten specimens were divided into two groups: five with welded dowels and five with glued dowels. The dowels were made of jatobá wood and the pieces were made of amescla wood. After welding and gluing the dowels, the shear strength of the joints was determined by mechanical tests. The taper of the dowels was also measured in the specimens with welded dowels. The results showed that the mean shear strength of the glued dowel joints was 4.878 MPa, while the mean shear strength of the welded dowel joints was 1.718 MPa. The mean taper of the dowels was 6.20%. The welded region of the dowel had a dark color due to the increase in temperature at the piece/dowel interface during the welding process. It was concluded that welding occurred between the pieces and dowels, demonstrating the potential of the technique using native wood species.