Influence of electrospun Nylon 6,6 nanofibrous mats on the interlaminar properties of Gr–epoxy composite laminates

R. Palazzetti, A. Zucchelli, C. Gualandi, M. L. Focarete, L. Donati, G. Minak, S. Ramakrishna

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Abstract

The present work aims at investigating the influence of electrospun Nylon 6,6 nanofibrous mat to interlaminar strength. Mode I and the Mode II fracture mechanics of virgin and nanomodified laminates are investigated. Nanomodified laminates are fabricated by interleaving an electrospun nanofibrous mats in laminate mid-plane. Double Cantilever Beam (DCB) and End Notched Flexure (ENF) tests are performed on both virgin and nanomodified configuration. Results show that electrospun nanofibrous mat is able to increase by 23.2% the mechanical energy absorbing capability and by about 5% the GIC. ENF tests reveal that the nanofibrous mats contribute to improve the maximum stress before the material crisis (6.5% of increment) and a measurable increment of (8.1%) the maximum mechanical energy that can be absorbed by the material during the crack propagation is registered. The acoustic emission (AE) technique is used to monitor both DCB and ENF tests. The AE information highlight that the nanofibrous mats mitigate the interlaminar matrix failure on both the fracture modes
Original languageEnglish
Pages (from-to)571-579
Number of pages9
JournalComposite Structures
Volume94
Issue number2
Early online date22 Aug 2011
DOIs
Publication statusPublished - Jan 2012
Event16 th International Conference on Composite Structures - Porto, Portugal
Duration: 28 Jun 201130 Jun 2011

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Keywords

  • composite laminates
  • delamination
  • mechanical tests
  • polymer electrospinning
  • electrospun nylon 6,6 nanofibrous mats
  • Gr–epoxy composite laminates
  • interlaminar properties

Cite this

Palazzetti, R., Zucchelli, A., Gualandi, C., Focarete, M. L., Donati, L., Minak, G., & Ramakrishna, S. (2012). Influence of electrospun Nylon 6,6 nanofibrous mats on the interlaminar properties of Gr–epoxy composite laminates. Composite Structures, 94(2), 571-579. https://doi.org/10.1016/j.compstruct.2011.08.019