Experimental investigation of the effect of different surface treatment on mode I fracture behavior of composite/aluminum adhesive joint

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Kariman Moghadam Amir; Rahnama Saeed

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Journal Paper

Paper Information

Journal: Journal of Science and Technology of Composites Year:2023 | Volume:9 | Issue:4 Page(s): 2116-2127

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Information Journal Paper

Title

Experimental investigation of the effect of different surface treatment on mode I fracture behavior of composite/aluminum adhesive joint

Author(s)

Kariman Moghadam Amir | Rahnama Saeed | Issue Writer Certificate

Keywords

Surface TreatmentQ4

Adhesive JointQ4

CompositeQ4

Mod I FractureQ4

Abstract

Compared to mechanical joining methods, adhesive bonded joints have uniform stress distribution, good fatigue performance and better weight reduction effect. Some failures in the adhesive bonded joints are caused by the presence of contamination and inappropriate roughness in the joint surfaces. In this study, the effect of different Surface Treatment on the mechanical behavior of the Composite/aluminum Adhesive Joint in the mode I of fracture is investigated by using Double-cantilever beam specimen. Surface Treatment has been done with three methods of Peel Ply Processing, Sanding and Laser for Composite adherent and two methods of Sanding and Laser for aluminum adherent. In the laser Surface Treatment method, the transverse distance of the grooves and the spots diameter are fixed, and the scanning speed and power of the machine are variable. The surface roughness measurement of the adherents shows the increase of the surface roughness up to a certain value of the laser energy density, but after that the roughness has decreased due to the melting of the adherent surface. The results show an increase of 13. 43% and 7. 46% in the critical strain energy release rate of the mode I of fracture using the laser Surface Treatment method compared to the Sanding method and the Peel Ply Processing method, respectively. Also, examination of the fracture surface of the joint shows an increase in the failure mode of fiber tearing at the joint surface with the correct selection of laser parameters, which has improved the strength of the joint.

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