Abstract
In this work, the carbon fibres (CFs) surfaces were modified via sizing and coated with a very thin layer of a complex formulation including carbon nanotubes (CNTs). A push-out method was developed based on nanoindentation to assess the interfacial shear strength of the fibre/matrix. The mechanical properties such as indentation hardness, reduced modulus, indentation displacement and indentation creep of the composite were evaluated by means of the Oliver-Pharr method. The critical load of different composites was measured and the interfacial shear strength (IFSS) was calculated to compare the effect of the CNTs concentration in the sizing solution. Wettability evaluation of the sized fibres was performed prior to nanoindentation to investigate the adhesion of the resin. After push-out testing, characterisation by optical microscopy/SEM was carried out to ratify the results. It was found sizing with a small amount of evenly distributed nano-inclusion on CFs can increase the interfacial shear strength but large amount of sizing could lead to a decrease of the interfacial bonding due to the agglomeration of CNTs on CFs.
Original language | English |
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Title of host publication | 6th International Conference of Engineering Against Failure (ICEAF-VI 2021) |
Publisher | EDP Sciences |
DOIs | |
Publication status | Published - 15 Nov 2021 |
Event | 6th International Conference of Engineering Against Failure (ICEAF-VI 2021) - Spetses island, Greece Duration: 23 Jun 2021 → 25 Jun 2021 Conference number: 6th https://www.fems.org/event/iceaf-vi-6th-international-conference-engineering-against-failure |
Publication series
Name | MATEC Web of Conferences |
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Volume | 349 |
ISSN (Electronic) | 2261-236X |
Conference
Conference | 6th International Conference of Engineering Against Failure (ICEAF-VI 2021) |
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Abbreviated title | ICEAF-VI 2021 |
Country/Territory | Greece |
Period | 23/06/21 → 25/06/21 |
Internet address |
Bibliographical note
AcknowledgmentsThis work was supported by the EU H2020 Project ‘Smart by Design and Intelligent by Architecture for turbine blade fan and structural components systems’ (SMARTFAN) under Grant no. 760779.
Keywords
- push-out y
- CNT
- carbon fibre reinforced composite
- nano-indentation
- wettability