Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 144, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2021.106334
Keywords
Polymer-matrix composites (PMCs); Thermoplastic resin; Thermosetting resin; Joints/joining
Funding
- European Union [690802]
- H2020 Societal Challenges Programme [690802] Funding Source: H2020 Societal Challenges Programme
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This study assessed the sensitivity of ultrasonic welding process for joining different composites, revealing that dissimilar composite welded joints are more sensitive to heating time. However, a relatively wide processing interval could still be obtained when the coupling layer had sufficient thickness.
This study aims at assessing the sensitivity of the ultrasonic welding process for joining epoxy- to thermoplastic-based composites sensitivity to the heating time. For that, carbon fibre (CF)/epoxy adherends with a co-cured PEI coupling layer were ultrasonically welded to CF/polyetheretherketone (PEEK) adherends at different heating times. Process-induced changes in the meso and microstructure of these welds were identified and correlated to the weld strength. Subsequently, a processing interval, i.e., a range of heating times resulting in less than 10% decrease of weld strength, was defined. As, expected, the dissimilar composite welded joints were more sensitive to the heating time than the CF/PEEK to CF/PEEK welded joints. However, this effect was less pronounced than expected, since a relatively wide processing interval could be obtained provided that the coupling layer had a sufficient thickness.
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