Manuscript (3).pdf (1.29 MB)
Theory of dynamic mode-II delamination in end-notched flexure tests
journal contribution
posted on 2021-06-30, 09:11 authored by Tianyu Chen, Christopher HarveyChristopher Harvey, Simon WangSimon Wang, Vadim SilberschmidtVadim SilberschmidtThe dynamic mode-II energy release rate of the end-notched flexure (ENF) test with applied time-dependent displacement is derived for the first time with the effect of vibration included. A dynamic Euler-Bernoulli beam theory is employed together with a deflection condition to simulate contact. To investigate the dynamic effect and the relative dynamic contribution from each vibration mode, a dynamic factor and a spatial factor are defined. It is found that the contribution of the ith vibration mode is dependent on the spatial factor (which is a function of the delamination length and the total length of the ENF specimen) and that certain vibration modes are dominant (depending on the delamination-length ratio). In addition, for a given spatial factor, there may be a certain vibration mode with a zero contribution to the ERR. The developed theory is verified against results from finite-element-method simulation for two cases of ENF tests and they are in excellent agreement. This work now allows the loading ratedependent mode-II delamination toughness of layered materials to be determined using ENF tests. In addition, it provides understanding of the structural dynamic response in the presence of mode-II delamination and can guide the design of structures to mitigate the vibration-driven delamination.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Aeronautical and Automotive Engineering
Published in
Composite StructuresVolume
274Publisher
ElsevierVersion
- AM (Accepted Manuscript)
Rights holder
© ElsevierPublisher statement
This paper was accepted for publication in the journal Composite Structures and the definitive published version is available at https://doi.org/10.1016/j.compstruct.2021.114332Acceptance date
2021-06-29Publication date
2021-07-03Copyright date
2021ISSN
0263-8223Publisher version
Language
- en
Depositor
Dr Christopher Harvey. Deposit date: 30 June 2021Article number
114332Usage metrics
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