Investigation of accumulated laser fluence and bondline thickness effects on adhesive joint performance of CFRP composites

In the present study, both the effects of accumulated laser fluence as surface treatment and bondline thickness on adhesive bonding of carbon fiber reinforced polymer (CFRP) composite materials were investigated. Proper CFRP composite surfaces for adhesive bonding were obtained by a laser treatment...

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Bibliographic Details
Published in:International journal of adhesion and adhesives 2019-03, Vol.89, p.109-116
Main Authors: Akman, Erhan, Erdoğan, Yalçın, Bora, Mustafa Özgür, Çoban, Onur, Oztoprak, Belgin Genc, Demir, Arif
Format: Article
Language:English
Subjects:
Adhesion tests
Adhesive bonding
Adhesive joints
Adhesive strength
Bonding strength
Bondline thickness
Carbon dioxide
Carbon dioxide lasers
Carbon fiber reinforced plastics
CFRP
CO2 laser
Composite materials
Contact angle
Fiber composites
Fiber reinforced polymers
Fluence
Lasers
Polymer matrix composites
Shear strength
Shear tests
Surface pre-treatment
Surface treatment
Thickness
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Summary:In the present study, both the effects of accumulated laser fluence as surface treatment and bondline thickness on adhesive bonding of carbon fiber reinforced polymer (CFRP) composite materials were investigated. Proper CFRP composite surfaces for adhesive bonding were obtained by a laser treatment process using pulsed CO2 laser. Laser treatments were obtained with different accumulated laser fluences and then surfaces were analyzed with roughness and contact angle measurements. Adhesive bonding was performed with various bondline thicknesses ranged between 30–500 µm using two component structural epoxy based paste adhesive (Loctite Hysol ® EA 9396TM). Adhesive bonding strength of bonded samples was determined with single lap shear tests. It is worthy to note that if the accumulated laser fluence which has significant effect on shear strength does not optimize, it causes ineffective adhesion.
ISSN:0143-7496
1879-0127
DOI:10.1016/j.ijadhadh.2018.12.003