Deakin University
Browse

File(s) under permanent embargo

Investigating the impact of laser treatment on fracture modes and strength of CFRP/AL 6061 single lap joint

Version 2 2024-06-03, 16:07
Version 1 2017-12-18, 13:23
conference contribution
posted on 2024-06-03, 16:07 authored by S Khaleel, Bernard RolfeBernard Rolfe, Riyadh Al-AmeriRiyadh Al-Ameri, Tim HilditchTim Hilditch
The mechanical performance of the adhesively bonded joint can be improved by enhancing the surface properties with laser. The laser treatment is fast, safe and practicable method for a wide range of materials including carbon fiber reinforced polymers (CFRP). In the current research, different power to speed combinations of a CO2 laser beam was used to modify the surface of the CFRP side of a CFRP/AL6061-T6 lap joint specimens prior to adhesive bonding. The adhesively bonded single lap joint (SLJ) specimens were tested in tension to investigate the influence of the laser treatment on shear strength, elongation and fracture mode. The roughness of the treated surfaces was measured using a non-contact profilometer and post failure modes were identified using optical microscopy and scanning electron microscopy (SEM). The results show a noticeable impact of the power to speed ratio of the laser beam on the roughness of the prepared surfaces. Moreover, a significant joint strength increase of 62% was measured over the untreated joint when the laser power and speed were 50 watts and 100 m/s respectively. An extended adhesive curing time also increased the joint strength. These changes in joint strength were accompanied by a change in the failure mode.

History

Volume

6

Pagination

18-22

Location

Singapore

Start date

2017-07-19

End date

2017-07-21

Language

eng

Publication classification

E Conference publication, E1 Full written paper - refereed

Copyright notice

[2017, International Institute for FRP in Construction]

Editor/Contributor(s)

Yue QR, Xian G

Title of proceedings

APFIS2017 : Proceedings of the 6th Asia-Pacific Conference on FRP in Structures

Event

FRP Application Committee of Chinese Civil Engineering Society. Conference (6th : 2017 : Singapore)

Issue

1

Publisher

International Institute for FRP in Construction

Place of publication

Singapore

Series

FRP Application Committee of Chinese Civil Engineering Society Conference