Investigation of thermo-oxidative ageing effects on the fatigue design of automotive anti-vibration parts

Type Article
Date 2018
Language English
Author(s) Broudin Morgane1, Marco Yann1, Le Saux Vincent1, Charrier Pierre2, Hervouet Wilfried2, Le Gac Pierre YvesORCID3
Affiliation(s) 1 : ENSTA Bretagne, Institut de Recherche Dupuy de Lôme (IRDL), UMR CNRS 6027, 2 Rue François Verny, 29200, Brest, France
2 : Vibracoustic, CAE & Durability Prediction, 1 Rue du Tertre, 44474, Carquefou, France
3 : IFREMER (French Ocean Research Institute), Centre de Brest, Materials and Structures Group, BP 70, F-29280, Plouzané, France
Meeting 12th International Fatigue Congress (FATIGUE 2018). May, 27th to June, 1st 2018., Poitiers
Source MATEC Web of Conferences (2261-236X) (EDP Sciences), 2018 , Vol. 165 , N. 08004 , P. 6p.
DOI 10.1051/matecconf/201816508004
WOS© Times Cited 2
Note Section : Fatigue of Polymers and Elastomers

Elastomeric parts found in automotive anti-vibration systems are usually massive. Ageing therefore leads to heterogeneous properties, usually induced by several mechanisms due to the availability, or not, of oxygen in the part’s bulk. To better understand the effects of oxygen in the degradation process and on the fatigue properties, this paper aims at studying the ageing of a rubber material (semi-efficient vulcanization system) in aerobic (with oxygen) and anaerobic (without oxygen) conditions for a wide range of temperatures, relevant for under hood applications. The material studied here is a fully formulated compound NR/IR blend reinforced with carbon black. A specific protocol to perform ageing under anaerobic conditions was set up and validated. Numerous tests have been carried out to evaluate the consequences of ageing on monotonic tension and fatigue properties. A comparison of these consequences and of their kinetics is finally presented for ageing with or without oxygen.

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