Crack initiation from a clinically relevant notch in a highly-crosslinked UHMWPE subjected to static and cyclic loading.
Crosslink density
Fatigue
Fatigue crack initiation
Frequency
Notch root
Polymer
R-ratio
Journal
Journal of the mechanical behavior of biomedical materials
ISSN: 1878-0180
Titre abrégé: J Mech Behav Biomed Mater
Pays: Netherlands
ID NLM: 101322406
Informations de publication
Date de publication:
03 2019
03 2019
Historique:
received:
14
08
2018
revised:
05
12
2018
pubmed:
19
1
2019
medline:
1
7
2020
entrez:
19
1
2019
Statut:
ppublish
Résumé
Crosslinked Ultra High Molecular Weight Polyethylene (UHMWPE), which is used as a bearing material in total joint replacement components, is subjected to static and cyclic loads in vivo. Resistance to crack initiation from a notch as a function of static and cyclic loads is not well understood for crosslinked UHMWPE. This study estimated the resistance of crosslinked UHMWPE (crosslinked with 100 kGy gamma radiation and remelted to extinguish free radicals) to crack initiation for a clinically relevant notch under both static and cyclic loading conditions. For cyclic loading, four frequencies were applied with a sine waveform and two frequencies were applied with a square waveform to independently estimate the effect of frequency and rate of loading on crack initiation. Crack initiation time and cycles to crack initiation were determined. Crack initiation time for fatigue loading conditions was substantially lower compared to static loading conditions. Crack initiation time decreased with an increase in test frequency. A square wave resulted in shorter crack initiation time compared to a sine wave. The results suggest that crosslinked UHMWPE is more resistant to crack initiation from a notch under static loading conditions compared to fatigue loading conditions.
Identifiants
pubmed: 30658250
pii: S1751-6161(18)31186-X
doi: 10.1016/j.jmbbm.2018.12.032
pmc: PMC6409198
mid: NIHMS1518819
pii:
doi:
Substances chimiques
Polyethylenes
0
ultra-high molecular weight polyethylene
0
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Langues
eng
Sous-ensembles de citation
IM
Pagination
366-372Subventions
Organisme : NIAMS NIH HHS
ID : R01 AR047192
Pays : United States
Organisme : NIAMS NIH HHS
ID : T32 AR007505
Pays : United States
Informations de copyright
Copyright © 2018 Elsevier Ltd. All rights reserved.
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