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Jeong, Hu Young
UCRF Electron Microscopy group
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Laser-assisted joining of carbon fiber reinforced polyetherketoneketone thermoplastic composite laminates

Author(s)
Choi, InsungRoh, Hyung DohJeong, Woo NamJeong, Hu YoungSuh, JeongYi, Jin-WooUm, Moon-KwangOh, YoungseokLee, Kwang-Hyeon
Issued Date
2022-12
DOI
10.1016/j.compositesa.2022.107228
URI
https://scholarworks.unist.ac.kr/handle/201301/60002
Citation
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING, v.163
Abstract
Carbon-fiber-reinforced thermoplastic (CFRTP) materials have drawn considerable interest owing to their high strength-to-weight ratio. Laser joining technologies have been reported to join CFRTP to metals or plastic ma-terials. However, the direct laser joining of CFRTP/CFRTP is challenging. Herein, we demonstrated the feasibility of laser direct joining of 2.2-mm-thick CFRTP/CFRTP by laser heat conduction. A thulium fiber laser (1940 nm) was used under the optimal joining conditions of 20 W power (beam diameter = 5.5 mm, approximately) and 3 min laser irradiation time. We observed that an increase in the laser irradiation spots per unit area results in a higher joining strength. The joining strengths of carbon fiber (CF)-polyetherketoneketone (PEKK)/CF-PEKK composites were evaluated by single lap shear tests, and the highest average interlaminar shear strength result was 30.9 MPa. Our study indicates that the laser-assisted joining of CF-PEKK/CF-PEKK laminates is viable and worthy of further exploration for industrial applications.
Publisher
ELSEVIER SCI LTD
ISSN
1359-835X
Keyword (Author)
APolymer-matrix composites (PMCs)BThermal propertiesEHeat treatmentLaser joining
Keyword
LIGHTWEIGHT DESIGNCFRPJOINTSPERFORMANCEPARAMETERSPOLYMERSQUALITY

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