Dependence on mean stress and stress amplitude of fatigue life of EPDM elastomers

Authors: Abraham, F.¹; Alshuth, T.²; Jerrams, S.³

Source: Plastics, Rubber and Composites, Volume 30, Number 9, September 2001 , pp. 421-425(5)

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Abstract:

This paper describes the dependence on test parameters of the fatigue resistance of EPDM. Fatigue was investigated using dumbbell specimens under load control at 1 Hz until failure. Tests were made in order to create a common Wöhler (S–N) curve while increasing the stress amplitude and also to show the influence of increasing minimum stress at constant stress amplitude on fatigue properties. The results of these tests confirmed the well known amplitude dependence of fatigue life in filled rubbers. An additional significant influence on fatigue life is seen to be the minimum stress applied during each cycle to these materials. Fatigue life is not dependent on strain crystallisation in EPDM as it is for natural rubber. The results of this research give component designers the opportunity to increase the fatigue lives of components made from this material.

Document Type: Regular Paper

DOI: http://dx.doi.org/10.1179/146580101101541822

Affiliations: 1: The Deutsches Institut f�r Kautschuktechnologie e.V. and Coventry University 2: The Department of Elastomeric Physics, Deutsches Institut f�r Kautschuktechnologie e.V., Eupener Stra�e 33, D-30519 Hannover, Germany 3: The Faculty of Engineering, Dublin Institute of Technology, Bolton Street, Dublin 1, Ireland

Publication date: 2001-09-01

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