DFC9-JPCR - Revision.pdf (1.53 MB)
Delamination in adhesively bonded CFRP joints : standard fatigue, impact-fatigue and intermittent impact
journal contribution
posted on 2008-10-17, 11:18 authored by Juan P. Casas-Rodriguez, Ian A. Ashcroft, Vadim SilberschmidtVadim SilberschmidtThe response of adhesive joints to three fatigue regimes, namely; constant amplitude
sinusoidal loading (standard fatigue, SF), cyclic in-plane impacts (impact fatigue, IF)
and a combination of the two (CSIF), has been investigated. The samples used in this
study were carbon fibre reinforced polymer (CFRP) lap-strap joints (LSJs) bonded
with a rubber modified epoxy adhesive. It was observed that fatigue fracture at very
low load amplitudes occurred in IF. Two main patterns of failure were observed in
SF; cohesive failure in the adhesive, which was linked to slow fatigue crack growth
behaviour, and a mixed-mode failure, involving failure in both the adhesive and the
CFRP. In addition, it was observed that the transition from cohesive to mixed mode
failure was accompanied by crack growth acceleration. In IF it was seen that all
failure was of a mixed-mechanism nature. In the combined standard and impact
fatigue it was seen that the introduction of a relatively small number of impacts
between SF blocks drastically changed the dynamics of fatigue crack propagation,
increasing the crack rate. A further observation was that cavitation of rubber particles
in the adhesive, which is seen as evidence of active toughening, was affected by the
addition of impact loading.
History
School
- Mechanical, Electrical and Manufacturing Engineering
Citation
CASAS-RODRIGUEZ, J.P., ASHCROFT, I.A. and SILBERSCHMIDT, V.V., 2008. Delamination in adhesively bonded CFRP joints : standard fatigue, impact-fatigue and intermittent impact. Composites Science and Technology, 68 (12), pp. 2401-2409 [doi:10.1016/j.compscitech.2007.11.006]Publisher
© ElsevierPublication date
2008Notes
This is a journal article. It was published in the journal, Composites and Science Technology [© Elsevier] and the definitive version is available at: http://www.sciencedirect.com/science/journal/02663538ISSN
0266-3538Language
- en