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Effect of UV Ageing on the fatigue life of bulk polyethylene

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submitted on 2024-07-09, 11:56 and posted on 2024-07-09, 11:57 authored by Hamza Lamnii, Moussa Nait-Abdelaziz, Georges Ayoub, Jean-Michel Gloaguen, Ulrich Maschke, Bilal Mansoor

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.

Other Information

Published in: MATEC Web of Conferences
License: http://creativecommons.org/licenses/by/4.0/
See article on publisher's website: https://dx.doi.org/10.1051/matecconf/201816508002

Additional institutions affiliated with: Mechanical Engineering Program - TAMUQ

Funding

Qatar National Research Fund (NPRP 7 - 1562 - 2 - 571), Durability of Semicrystalline Polymers under Extreme Environments: Characterization and Modeling.

History

Language

  • English

Publisher

EDP Sciences

Publication Year

  • 2018

License statement

This Item is licensed under the Creative Commons Attribution 4.0 International License.

Institution affiliated with

  • Texas A&M University at Qatar

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