On the notch fatigue strength of additively manufactured polylactide (PLA)

Abstract

The strength and cracking behaviour under fatigue loading of additively manufactured polylactide (PLA) was investigated experimentally to quantify and model the role of notches. These tests were run under load ratios equal to -1 and to 0. Being supported by the experimental evidence, 3Dprinted PLA was treated as a linear-elastic, isotropic, and homogenous material. This allowed the use of the Theory of Critical Distances to be extended also to the fatigue assessment of notched 3D-printed PLA. This theory was seen to return accurate estimates. This confirms that it can be used also to estimate fatigue lifetime of notched 3D-printed polymers.

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Item Type:	Article
Authors/Creators:	Ezeh, O.H. Susmel, L. https://orcid.org/0000-0001-7753-9176
Copyright, Publisher and Additional Information:	© 2020 Published by Elsevier Ltd. This is an author produced version of a paper subsequently published in International Journal of Fatigue. Uploaded in accordance with the publisher's self-archiving policy. Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/).
Keywords:	Additive manufacturing; PLA; notch; fatigue; critical distance
Dates:	Published: July 2020 Published (online): 7 March 2020 Accepted: 6 March 2020
Institution:	The University of Sheffield
Academic Units:	The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Civil and Structural Engineering (Sheffield)
Depositing User:	Symplectic Sheffield
Date Deposited:	06 Mar 2020 12:13
Last Modified:	03 Dec 2021 17:04
Status:	Published
Publisher:	Elsevier
Refereed:	Yes
Identification Number:	10.1016/j.ijfatigue.2020.105583
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:158161

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On the notch fatigue strength of additively manufactured polylactide (PLA)

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