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An activated energy approach for accelerated testing of the deformation of UHMWPE in artificial joints

Titelangaben

Galetz, Mathias ; Glatzel, Uwe:
An activated energy approach for accelerated testing of the deformation of UHMWPE in artificial joints.
In: Journal of the mechanical behavior of biomedical materials. Bd. 3 (2010) Heft 4 . - S. 331-338.
ISSN 1878-0180
DOI: 10.1016/j.jmbbm.2010.01.004

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Link zum Volltext (externe URL): Volltext

Abstract

The deformation behavior of ultrahigh molecular polyethylene (UHMWPE) is studied in the temperature range of 23-80 degrees C. Samples are examined in quasi-static compression, tensile and creep tests to determine the accelerated deformation of UHMWPE at elevated temperatures. The deformation mechanisms under compression load can be described by one strain rate and temperature dependent Eyring process. The activation energy and volume of that process do not change between 23 degrees C and 50 degrees C. This suggests that the deformation mechanism under compression remains stable within this temperature range. Tribological tests are conducted to transfer this activated energy approach to the deformation behavior under loading typical for artificial knee joints. While this approach does not cover the wear mechanisms close to the surface, testing at higher temperatures is shown to have a significant potential to reduce the testing time for lifetime predictions in terms of the macroscopic creep and deformation behavior of artificial joints.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: Biocompatible Materials/chemistry; Biomechanical Phenomena; Compressive Strength; Hot Temperature; Knee Prosthesis; Materials Testing/methods; Polyethylenes/chemistry; Stress, Mechanical; Surface Properties; Tensile Strength; Weight-Bearing
Institutionen der Universität: Fakultäten
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Metallische Werkstoffe > Lehrstuhl Metallische Werkstoffe - Univ.-Prof. Dr.-Ing. Uwe Glatzel
Profilfelder
Profilfelder > Advanced Fields
Profilfelder > Advanced Fields > Neue Materialien
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Forschungseinrichtungen > Forschungszentren > Bayreuther Materialzentrum - BayMAT
Fakultäten > Fakultät für Ingenieurwissenschaften
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Metallische Werkstoffe
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 600 Technik, Medizin, angewandte Wissenschaften
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Eingestellt am: 23 Sep 2015 06:24
Letzte Änderung: 23 Sep 2015 06:24
URI: https://eref.uni-bayreuth.de/id/eprint/5253