Effect of Mechanical Fastening Versus Adhesively Bonded Joints of Polymer Composites on Lap Joint Strength

Abstract

To examine the viability of combining pine needle fiber-reinforced polylactic acid composites, galvanized iron sheet and aluminum sheet via the use of mechanical fastening and adhesive bonding methods was investigated. The study included the preparation of three distinct kinds of joints, namely, adhesive, nut-bolt, and rivet joints, with the purpose of assessing their tensile and flexural strength. The findings indicated that the use of both mechanical fastening and adhesive bonding methods yielded successful outcomes in the bonding of these materials, with the strength of the joints changing based on the approach employed. The adhesive bonding approach exhibited superior tensile and flexural strength in comparison to the mechanical fastening technique. The microstructural examination demonstrated that the adhesive bonding approach yielded a consistent and uninterrupted contact between the materials, while the mechanical fastening technique exhibited some surface imperfections and deformations. The results indicated that both approaches were effective in producing robust and long-lasting joints.