Harvey_1-s2.0-S2666682020300554-main.pdf (2.04 MB)
Theory of dynamic mode-II delamination in end-loaded split tests
journal contribution
posted on 2020-11-09, 09:55 authored by Tianyu Chen, Christopher HarveyChristopher Harvey, Simon WangSimon Wang, Vadim SilberschmidtVadim SilberschmidtThe dynamic mode-II energy release rate (ERR) of the end-loaded split (ELS) test with
applied time-dependent displacement is derived for the first time with the effect of vibration
included. Dynamic Euler-Bernoulli beams are used together with a deflection condition to
simulate contact. To understand 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 ELS specimen. Certain vibration modes are
dominant dependent on the spatial factor. In addition, for a given spatial factor, there may be a
certain vibration mode, which makes approximately zero contribution to the ERR. The
developed theory is verified against results from finite-element method (FEM) simulations and
it is in excellent agreement. This work now allows the loading rate-dependent mode-II
delamination toughness of materials to be determined by using ELS 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 against vibration-driven
delamination.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Aeronautical and Automotive Engineering
Published in
Composites Part C: Open AccessVolume
3Publisher
ElsevierVersion
- VoR (Version of Record)
Rights holder
© The authorsPublisher statement
This is an Open Access Article. It is published by Elsevier under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/Acceptance date
2020-10-26Publication date
2020-10-31Copyright date
2020ISSN
2666-6820Publisher version
Language
- en