Fatigue strength of adhesively bonded joints of CFRP with laser surface treatment

Tomohiro Yokozeki, Keigo Sato, Masaru Ishibashi, Hideyasu Shamoto, Yutaka Iwahori

Research output: Contribution to conferencePaper

Abstract

Pulsed laser surface treatment was applied to carbon fiber reinforced plastics (CFRPs) to enhance the work efficiency as well as to establish the stable clean process of surface pre-treatment during the bonding process of CFRP structures. Surface analyses were conducted to CFRP treated by various laser conditions in order to find the optimal laser process. Adhesively bonded specimens were fabricated using CFRPs subjected to laser treatment, and adhesive lap shear strength of CFRPs bonded with adhesive films was evaluated compared with the abrasive paper treatment. Surface conditions, adhesive strength, and adhesive fracture mode depended on the treatment parameters, and adhesive strength similar to abrasive paper treatment could be obtained in the specimens with appropriate laser treatment. Debond fracture toughness and fatigue lap shear strength were also evaluated to confirm the long-term durability and reliability of laser treated CFRP bonded joints. It was concluded that laser surface treatment can be applied to the surface treatment process of CFRP bonded structures.

Original languageEnglish
Pages367-374
Number of pages8
Publication statusPublished - 1 Jan 2015
Event34th Conference and the 28th Symposium of the International Committee on Aeronautical Fatigue and Structural Integrity, ICAF 2015 - Helsinki, Finland
Duration: 1 Jun 20155 Jun 2015

Conference

Conference34th Conference and the 28th Symposium of the International Committee on Aeronautical Fatigue and Structural Integrity, ICAF 2015
CountryFinland
CityHelsinki
Period1/06/155/06/15

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    Yokozeki, T., Sato, K., Ishibashi, M., Shamoto, H., & Iwahori, Y. (2015). Fatigue strength of adhesively bonded joints of CFRP with laser surface treatment. 367-374. Paper presented at 34th Conference and the 28th Symposium of the International Committee on Aeronautical Fatigue and Structural Integrity, ICAF 2015, Helsinki, Finland.