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

Title data

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. Vol. 3 (2010) Issue 4 . - pp. 331-338.
ISSN 1878-0180
DOI: https://doi.org/10.1016/j.jmbbm.2010.01.004

Official URL: Volltext

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
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
Institutions of the University: Faculties
Faculties > Faculty of Engineering Science > Chair Metals and Alloys > Chair Metals and Alloys - Univ.-Prof. Dr.-Ing. Uwe Glatzel
Profile Fields
Profile Fields > Advanced Fields
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Metals and Alloys
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences
600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 23 Sep 2015 06:24
Last Modified: 23 Sep 2015 06:24
URI: https://eref.uni-bayreuth.de/id/eprint/5253