New developments in fracture of rubbers: Predictive tools and influence of thermal aging
TypeArticles dans des revues avec comité de lecture
In this work, the influence of thermal oxidative aging on the ultimate mechanical properties of rubbers is investigated. Two new approaches to predict failure properties are proposed. The first one is the stress limiter approach that uses a “damage” parameter allowing determination of the failure stress and strain of an aged material knowing both the mechanical properties and macromolecular network characteristics of an as-received material. The second one is an extension of the energy limiter approach that suggests capturing the drop of the stress at failure by replacing the strain energy density function of an as-received elastomeric material by a function expressed in terms of an energy limiter. The predictive capabilities of these two approaches are validated using experimental results for two elastomeric materials: an EPDM and a polychloroprene (CR), both of which exhibit a largely predominant post-crosslinking (over chain scissions) during aging. Comparison between the predictions and the experimental results in terms of failure stresses and strains under uniaxial tension showed a good agreement. Consequently, these two approaches are promising tools for designing elastomeric parts subjected to thermal oxidative aging.
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Time to failure prediction in rubber components subjected to thermal ageing: A combined approach based upon the intrinsic defect concept and the fracture mechanics BEN HASSINE, Mouna; NAÏT-ABDELAZIZ, M; ZAÏRI, F; COLIN, Xavier; TOURCHER, C; MARQUE, Gregory (Elsevier, 2014)In this contribution, we attempt to derive a tool allowing the prediction of the stretch ratioat failure in rubber components subjected to thermal ageing. To achieve this goal, the mainidea is to combine the fracture ...
FOKOUA, Georges; GABILLET, Céline; AUBERT, Adrien; COLIN, Catherine (2014)The study is an experimental investigation of the interactions between bubbles, coherent motion and viscous drag in a Taylor Couette flow, for the outer cylinder at rest. The cylinder radii ratio η is 0.91. Bubbles are ...
FOKOUA, Georges; GABILLET, Céline; COLIN, Catherine (2013)This study is an experimental investigation of the interactions between the bubbles, the coherent motion and the viscous drag in a Taylor Couette flow, for the outer cylinder at rest. The cylinder radius ratio is 0.9. ...
NDONGO FOKOUA, Georges; GABILLET, Céline; AUBERT, Adrien; COLIN, Catherine (AIP Publishing, 2015)An experimental investigation of the interactions between bubbles, coherent motion and viscous drag in a Taylor-Couette flow with the outer cylinder at rest is presented. The cylinder radii ratio η is 0.91. Bubbles are ...
TEREKHINA, Svetlana; MILLE, Marion; FAYOLLE, Bruno; COLIN, Xavier (Springer, 2013)The thermal ageing of a neat epoxy matrix has been studied at 200°C in air by three complementary analytical techniques: optical microscopy, mechanical spectrometry and nano-indentation. Thermal oxidation is restricted in ...