MATEC Web Conf.
Volume 165, 201812th International Fatigue Congress (FATIGUE 2018)
|Number of page(s)||6|
|Section||Fatigue of Polymers and Elastomers|
|Published online||25 May 2018|
Effect of UV Ageing on the fatigue life of bulk polyethylene
Universite de Lille, FRE 3723 - LML - Laboratoire de Mécanique de Lille, 59000 Lille, France
2 Mechanical Engineering Program, Texas A&M University at Qatar, Education City, Qatar
3 Industrial and Manufacturing System Engineering department, University of Michigan Dearborn, 48128 Dearborn, USA
4 Université de Lille, Unité Matériaux Et Transformations (UMET), UMR CNRS 8207, F-59650 Villeneuve d’Ascq, France
* Corresponding author: firstname.lastname@example.org
Polymers operating in various weathering conditions must be assessed for lifetime performance. Particularly, ultraviolet (UV) radiations alters the chemical structure and therefore affect the mechanical and fatigue properties. The UV irradiation alters the polymer chemical structure, which results into a degradation of the mechanical and fatigue behavior of the polymer. The polymer properties degradation due to UV irradiation is the result of a competitive process of chain scission versus post-crosslinking. Although few studied investigated the effect of UV irradiation on the mechanical behaviour of thermoplastics, fewer examined the UV irradiation effect on the fatigue life of polymers. This study focuses on investigating the effect of UV irradiation on the fatigue properties of bulk semi-crystalline polymer; the low density Polyethylene (LDPE). Tensile specimens were exposed to different dose values of UV irradiation then subjected to fatigue loading. The fatigue tests were achieved under constant stress amplitude at a frequency of 1Hz. The results show an important decrease of the fatigue limit with increasing absorbed UV irradiation dose.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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