Title: LASER SURFACE ENGINEERING FOR ADHESIVELY BONDED CFRP LAP JOINTS

Authors: Kartikey Shahi, Rushikesh Suresh Ambekar, Digvijay Pratap Singh, Darshan H R, Debiprosad Roy Mahapatra

DOI: https://doi.org/10.33599/GL.2026.INCOMAT.TP26-0014

Abstract: This study investigates laser‑based surface texturing as a method for improving the lap-shear strength of lap joints. The work begins with a review of the state of the art in surface preparation techniques to improve joint efficiency. Conventional and modern approaches, including mechanical, chemical, and non-contact methods, are discussed to establish their benefits and limitations. Based on this background, bidirectional woven carbon-fiber-reinforced polymer (CFRP) laminate was fabricated and used as adherends for single lap joints. Laser surface texturing was applied to the bonding region using a cross-hatch scanning strategy to generate controlled surface features prior to adhesive bonding. Single-lap joints were prepared in accordance with ASTM D5868 and tested under monotonic loading using a universal testing machine. Load–displacement response and lap-shear strength were recorded for untreated and laser-textured specimens. The experimental results show a significant improvement in the shear strength of laser-textured joints compared with untreated joints. Overall, this study provides a structured experimental basis for assessing laser surface texturing as a surface preparation method for CFRP adhesive bonding.

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Conference: INCOMAT 2026

Publication Date: 2026/03/13

SKU: INCOMAT.TP26-0014

Pages: 14

Price: $28.00