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Influence of electrospun Nylon 6,6 nanofibrous mats on the interlaminar properties of Gr-epoxy composite laminates |
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| Authors: | R. Palazzetti A. Zucchelli C. Gualandi M.L. Focarete |
| Affiliation: | a University of Bologna, Mechanical Engineering Department DIEM, viale del Risorgimento 2, 40136 Bologna, Italy b Advanced Applications in Mechanical Engineering and Materials Technology, Interdepartmental Center for Industrial Research, Italy c Department of Chemistry ’Giacomo Ciamician’ and National Consortium of Materials Science and Technology (INSTM, Bologna RU) University of Bologna, via Selmi 2, 40132 Bologna, Italy d Department of Mechanical Engineering, National University of Singapore, v21 Lower Kent Ridge Road, Singapore 119077, Singapore e King Saud University, Saudi Arabia |
| 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. |
| Keywords: | Polymer electrospinning Composite laminates Delamination Mechanical tests |
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