Analysis of energy release rate of laser-induced cohesive bonding of carbon fiber-reinforced polyetherketoneketone thermoplastic compositesopen access
- Authors
- Roh, Hyung Doh; Choi, Insung; Jeong, Woo Nam; Lee, Jungwan; Kim, Jung-soo; Yi, Jin-Woo; Um, Moon-Kwang; Lee, Kwang-Hyeon; Oh, Youngseok
- Issue Date
- Dec-2023
- Publisher
- Elsevier BV
- Keywords
- Polymer-matrix composites; Thermal properties
- Citation
- Polymer Testing, v.129, pp 1 - 9
- Pages
- 9
- Indexed
- SCIE
SCOPUS
- Journal Title
- Polymer Testing
- Volume
- 129
- Start Page
- 1
- End Page
- 9
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/118603
- DOI
- 10.1016/j.polymertesting.2023.108271
- ISSN
- 0142-9418
1873-2348
- Abstract
- In this study, laser joining of carbon fiber/polyetherketoneketone composites with several patterns was inves-tigated to achieve weight reduction without any mechanical fasteners. The laser beam concentrated the energy, and heat conduction in the through-thickness direction of heterogeneous carbon fiber-reinforced thermoplastics caused molecular diffusion at the joining interface. According to the double-beam cantilever test results, the maximum energy release rate (ERR) was 2.01 J/mm2, which was 900 % higher than that of epoxy adhesive joining using laser power densities in the range of 1.05-1.34 W/mm2. A higher ERR was achieved because the optimized laser joining pattern secured repetitive cohesive joining at the interface. Thus, a complicated and step-wise crack opening was observed, which interfered with the propagation.
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