Abstract
The ability to prevent catastrophic failures in secondary bonded CFRP adhesive joints is important for reliable automotive and aerospace structures. In a previous study, we proposed an innovative damage-tolerant interfacial design concept for adhesively bonded composite joints, which relied on the extrinsic dissipation of bridging adhesive ligaments enabled by controlling the adhesion at CFRP/epoxy interfaces. In this work, we experimentally validate this strategy by combining laser processing and mechanical testing using double cantilever beam (DCB) joints. Mechanical tests indicate that the pattern geometry, i.e., number and spacing of the areas with different adhesion, controls the formation of either single or multiple bridging adhesive ligaments. Therefore, the proposed strategy increases the overall work of fracture, and delay crack propagation by the associated tractions in the crack's wake, paving a promising route to design more reliable and safer CFRP adhesive joints.
Recommended Citation
R. Tao et al., "Laser-Based Interfacial Patterning Enables Toughening of CFRP/epoxy Joints through Bridging of Adhesive Ligaments," Composites Part A Applied Science and Manufacturing, vol. 139, article no. 106094, Elsevier, Dec 2020.
The definitive version is available at https://doi.org/10.1016/j.compositesa.2020.106094
Department(s)
Mechanical and Aerospace Engineering
Publication Status
Full Text Access
Keywords and Phrases
Bonding; Bridging; CFRP; Laser; Toughening strategy
International Standard Serial Number (ISSN)
1359-835X
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2025 Elsevier, All rights reserved.
Publication Date
01 Dec 2020
Comments
King Abdullah University of Science and Technology, Grant OSR-2017-CRG6-3388.01