Effect of Two Different Epoxy‐Adhesives on the Bond Strength of Single‐Lap, Butt and Scarf Joints of Sisal‐Jute Fiber Composites

ABSTRACT Sisal and jute woven mat epoxy composites offer uniform fiber distribution and ease of fabrication, with the mat structure significantly enhancing wear resistance. This study compares the adhesive bond strength of these composites using sisal, jute, and hybrid mats joined with single lap, butt, and scarf configurations (ASTM D5868‐01R14) and two epoxy adhesives: LY‐556/HY951 and XIN‐100 IN/XIN‐900. Results demonstrate that enhanced fiber/matrix interfacial bonding increases joint strength, with both fibers exhibiting superior adhesion to XIN‐100 IN/XIN‐900. The hybrid mat achieved the highest tensile strength in both matrices compared to sisal or jute alone. Tensile tests and Field Emission Scanning Electron Microscopy (FE‐SEM) conducted at room temperature revealed the failure mechanisms of the bonded laminates.