Mechanical Behavior of Laser Engraved Single Lap Joints Adhered by Polymeric Material

Ayad Abid Muhmmed; Mohammed Khazal Hussain; Ahmed Rahman Khudadad; Hassan Hamoodi Mahdi; Mohanad Kadhim Mejbel

doi:10.15866/ireme.v15i12.21278

Mechanical Behavior of Laser Engraved Single Lap Joints Adhered by Polymeric Material

Ayad Abid Muhmmed⁽¹⁾, Mohammed Khazal Hussain⁽²⁾, Ahmed Rahman Khudadad^(3*), Hassan Hamoodi Mahdi⁽⁴⁾, Mohanad Kadhim Mejbel⁽⁵⁾

^(*) Corresponding author

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DOI: https://doi.org/10.15866/ireme.v15i12.21278

Abstract

One of the critical factors affecting the joint’s mechanical properties is surface roughness. The relationship between adhesion and surface roughness is complicated. This work examined different combinations of surface perforations of aluminum substrates and their effect on the adhesion between the two metallic surfaces, this is achieved by modifying the surface of the contact area (single lap joint area) using an engraving process with a fiber laser. Four separate different modified engraved surfaces with a Vertical Line (VL), Horizontal Line (HL), Cross-Line 45° (CL), and Random Dots (RD). The experimental tests of the four types of the modified surface were with (10 N, 20 N, and 30 N) applied loads do the lap joint conduct after using adhesive. The results reported that the surface roughness had a noticeable influence on the bonding strength, which is supposed to be related to the penetration of the adhesive into the micron-sized etching grooves of the metal substrates. The result also indicated that the load applied to the lap joint influences more than the modified surface. The modified surface with cross-line 45° (CL) with 10 N applied load on the lap joint gives a 46.8% increase in the joint shear force compared with an ungraved surface (RF).
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Keywords

Single Lap Joint; Roughness; Adhesives in Bounding Joint; Joint Shear Force; Fiber Laser

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