Abstract
Secondary adhesive bonding of carbon fiber-reinforced polymer laminates is of great interest for the aerospace and automotive industries. However, joint reliability is still a major concern because of fabrication-induced or service-related cracks that are difficult to monitor and can lead to catastrophic failure. In this work, we propose a patterning strategy where the careful design of spatially varying interface properties enables the formation of an adhesive ligament that acts as a crack-arrest feature. Bi-dimensional finite element models of adhesively bonded double cantilever beams were employed to investigate the role of the main parameters of the pattern (i.e., geometrical parameters and interfacial properties) under mode I loading. The results show that an adhesive ligament can either bridge the separating arms, largely enhancing the dissipated energy, or fail, thereby limiting the attainment of a R-curve-like response. The precise scenario is heavily dependent on the contrast in interfacial properties rather than the geometrical details of the pattern.
Recommended Citation
R. Tao et al., "On Controlling Interfacial Heterogeneity to Trigger Bridging in Secondary Bonded Composite Joints: An Efficient Strategy to Introduce Crack-Arrest Features," Composites Science and Technology, vol. 188, article no. 107964, Elsevier, Mar 2020.
The definitive version is available at https://doi.org/10.1016/j.compscitech.2019.107964
Department(s)
Mechanical and Aerospace Engineering
Publication Status
Full Text Access
Keywords and Phrases
Adhesive joints; CFRP; Cohesive zone model; Crack-arrest feature; Interface
International Standard Serial Number (ISSN)
0266-3538
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2025 Elsevier, All rights reserved.
Publication Date
01 Mar 2020
Comments
Office of Research and Sponsored Programs, Marquette University, Grant OSR-2017-CRG6-3388.01