Low‐pressure additive manufacturing of continuous fiber‐reinforced polymer composites

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Title: Low‐pressure additive manufacturing of continuous fiber‐reinforced polymer composites
Authors: O'Connor, HeatherDowling, Denis P.
Permanent link: http://hdl.handle.net/10197/12012
Date: Nov-2019
Online since: 2021-03-08T12:15:17Z
Abstract: Continuous fibre reinforced polymer composites have found a wide range of applications in the automotive and aerospace industry, due to their lightweight properties. Recently the use of additive manufacturing (AM) has been developed for the fabrication of these composites. This study investigates the use of both atmospheric and for the first time, low-pressure (1 Pa) processing conditions, for the AM of continuous carbon, glass and Kevlar fibre reinforced nylon composites. DSC was used to compare the thermal properties of the three types of fibre reinforced filament, prior to printing. It was found that the melting peak was dependent on filament type, which can be related to the polymer processing conditions used during their fabrication. Based on computed tomography measurements, it was found that the use of low-pressure printing conditions yielded a reduction in porosity for the carbon, glass and Kevlar printed composites of 5.7, 1.0 and 1.7 % respectively. The mechanical properties of the composites were compared, using a short beam shear test, which assisted in the measurement of interlaminar properties. An increase in interlaminar shear strength of 33, 22 and 12% was obtained for the carbon, glass and Kevlar fibre reinforced polymer composites respectively, when printed under low-pressure, compared with that obtained at atmospheric pressure.
Funding Details: Science Foundation Ireland
Type of material: Journal Article
Publisher: Wiley
Journal: Polymer Composites
Volume: 40
Issue: 11
Start page: 4329
End page: 4339
Copyright (published version): 2019 Society of Plastics Engineers
Keywords: 3D printingAdditive manufacturingFiber-reinforced polymeric compositeLow pressureVacuum
DOI: 10.1002/pc.25294
Language: en
Status of Item: Peer reviewed
This item is made available under a Creative Commons License: https://creativecommons.org/licenses/by-nc-nd/3.0/ie/
Appears in Collections:Mechanical & Materials Engineering Research Collection
Chemical and Bioprocess Engineering Research Collection
I-Form Research Collection

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