The double cantilever beam (DCB) tests are widely used to assess the interfacial delamination properties of laminated composites. For quasi-static loads, the DCB tests are standardized based on the beam mechanics; for dynamic loads, however, such as high-loading-rate impact and cyclic loads, there is no established analytical theory. This presents a significant obstacle preventing the research community from assessing the delamination behavior of composites or adhesives for their application under complex in-service loads. In this paper, the theory of evaluating dynamic mode-I delamination driving force for DCBs under general displacement loads is developed for the first time, accounting for structural vibration effects. The developed theory is demonstrated by two examples: high-loading-rate split Hopkinson bar impact and cyclic fatigue loads. The analytical solutions are validated by published experiment results and in-house tests. This work provides a fundamental analytical tool to study and assess the fracture behavior of fiber reinforced-polymer composite and adhesive materials under various loading conditions.
Bibliographical note© 2022, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ 10.1016/j.compscitech.2022.109632
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FunderThis work was supported by the National Natural Science Foundation of China (Grant No. 51401028 , No. 51271193 , No. 11790292 ), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB22040303 ), and the Innovation Program ( 237099000000170004 ).
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- Cyclic loads
- Double cantilever beam test
- Dynamic energy release rate
- General displacement loads
- High loading rate and impact
ASJC Scopus subject areas
- Ceramics and Composites