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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Petrov, R. H. | Madrid |
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| Bih, L. |
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| Casati, R. |
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| Kočí, Jan | Prague |
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| Azam, Siraj |
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| Ali, M. A. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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Zhang, Bing
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Publications (5/5 displayed)
- 2018COUPON SCALE MODELLING OF THE BRIDGING MECHANICS OF HIGH-RATE LOADED Z-PINS
- 2016An Experimental Investigation into Multi-Functional Z-pinned Composite Laminatescitations
- 2016On the delamination self-sensing function of Z-pinned composite laminatescitations
- 2015Through-thickness sensing of single Z-pin reinforced composite laminates
- 2015Micro-mechanical finite element analysis of Z-pins under mixed-mode loadingcitations
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article
An Experimental Investigation into Multi-Functional Z-pinned Composite Laminates
Abstract
This paper investigates the feasibility of monitoring progressive delamination growth in Z-pinned composite laminates via the measurement of through-thickness electrical resistance. This novel health monitoring technique is based on connecting Z-pins both in series and in parallel by means of arrays of electrodes arranged on the laminate surfaces. This creates a multi-functional (through-thickness reinforcing and sensing) laminated structure. Experimental results on double-cantilever beam coupons demonstrate that the entire Mode I bridging response of Z-pins can be monitored, from the arrival of the delamination front to the complete pull-out of the through-thickness reinforcement. Hence the extent of delamination can be inferred from the through-thickness resistance. This is proved for both conductive (carbon fibre-reinforced) and non-conductive (glass fibre-reinforced) laminates. The premature Z-pin failure during progressive pull-out corresponds to an abrupt increase of through-thickness electrical resistance. The delamination sensing/suppression method presented in this paper can be readily applied to Z-pinned composites at structural level.