Dynamic analysis of multilayer GFRP sandwich slabs with interlayer delaminations
Paper
Paper/Presentation Title | Dynamic analysis of multilayer GFRP sandwich slabs with interlayer delaminations |
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Presentation Type | Paper |
Authors | Jayatilake, Indunil N. (Author), Karunasena, Warna (Author) and Lokuge, Weena (Author) |
Editors | Sabu, John and Das, Raj |
Journal or Proceedings Title | Proceedings of the 8th Australasian Congress on Applied Mechanics (ACAM 8) |
ERA Conference ID | 42491 |
Number of Pages | 9 |
Year | 2014 |
Place of Publication | Australia |
ISBN | 9781922107350 |
Conference/Event | 8th Australasian Congress on Applied Mechanics (ACAM 8) |
Australasian Congress on Applied Mechanics | |
Event Details | Australasian Congress on Applied Mechanics Rank A A A A A A A A A A A A A A A |
Event Details | 8th Australasian Congress on Applied Mechanics (ACAM 8) Event Date 24 to end of 28 Nov 2014 Event Location Melbourne, Australia |
Abstract | A structural composite multilayer slab can be manufactured by gluing two or more composite sandwiches together to form a laminated composite. The dynamic behaviour of these multilayer composite structures is an important technological area to be investigated and understood if these materials are to be used efficiently. Interlayer delamination is one of the major failure modes which endanger the reliability of composite structures. Delamination can grow in size under increasing loads and with time and hence render the laminate structurally useless. In particular, delamination may reduce the natural frequency which in turn may result in resonance. The current research study concentrates on investigating the free vibration behaviour of fibre composite multilayer sandwich slabs with interlayer delaminations. A parametric investigation is carried out to assess the influence of various parameters of concern on the free vibration behaviour, using the finite element package Strand7. Furthermore, selected points in the delaminated region are connected appropriately to simulate bolting as a remedial measure to reduce the effect of delamination. Layers within the two delaminated regions are connected by 'master slave links' to allow for sliding in a horizontal plane between the two adjacent delaminated regions but in contact with each other in the vertical direction. First order shear deformation theory based plate elements in Strand7 are used to model each sandwich layer. It is observed from analyses that delamination causes reduction in natural frequency and generally the variation becomes more significant as the mode number increases. It is also revealed that bolting the delaminated region can significantly reduce the natural frequency variation due to delamination thus improving the dynamic performance. |
Keywords | fibre composite multilayer slab; dynamic analysis; free vibration behaviour; delamination |
ANZSRC Field of Research 2020 | 400505. Construction materials |
401602. Composite and hybrid materials | |
401702. Dynamics, vibration and vibration control | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Centre of Excellence in Engineered Fibre Composites |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q2xx5/dynamic-analysis-of-multilayer-gfrp-sandwich-slabs-with-interlayer-delaminations
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