Characterization and modeling of filled rubber submitted to thermal aging

Bouaziz, Rami; Ahose, Komla Dela; Lejeunes, Stéphane; Eyheramendy, Dominique; Sosson, Franck

doi:10.1016/j.ijsolstr.2019.04.013

Cited by 24 publications

(8 citation statements)

References 29 publications

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“…This confirms that E continuously increases with ageing and that this increase is more pronounced at higher temperatures of exposure for a given ageing time. Similar trends have been obtained on a carbon black filled butadiene in [ 19 ]. Since modulus is driven by the crosslink density, it is thus possible to follow chemical modification through this quantity.…”

Section: Resultssupporting

confidence: 86%

Elastic Properties of Polychloroprene Rubbers in Tension and Compression during Ageing

Bouaziz

Truffault

Borisov³

et al. 2020

Polymers

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Being able to predict the lifetime of elastomers is fundamental for many industrial applications. The evolution of both tensile and compression behavior of unfilled and filled neoprene rubbers was studied over time for different ageing conditions (70 °C, 80 °C and 90 °C). While Young’s modulus increased with ageing, the bulk modulus remained almost constant, leading to a slight decrease in the Poisson’s ratio with ageing, especially for the filled rubbers. This evolution of Poisson’s ratio with ageing is often neglected in the literature where a constant value of 0.5 is almost always assumed. Moreover, the elongation at break decreased, all these phenomena having a similar activation energy (~80 kJ/mol) assuming an Arrhenius or pseudo-Arrhenius behavior. Using simple scaling arguments from rubber elasticity theory, it is possible to relate quantitatively Young’s modulus and elongation at break for all ageing conditions, while an empirical relation can correlate Young’s modulus and hardness shore A. This suggests the crosslink density evolution during ageing is the main factor that drives the mechanical properties. It is then possible to predict the lifetime of elastomers usually based on an elongation at break criterion with a simple hardness shore measurement.

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Section: Resultssupporting

confidence: 86%

Elastic Properties of Polychloroprene Rubbers in Tension and Compression during Ageing

Bouaziz

Truffault

Borisov³

et al. 2020

Polymers

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“…Moreover, the time-dependent deformation (viscohyperelastic behaviour) will be studied and included on both volumetric and isochoric responses. (Bouaziz, Ahose, Lejeunes, Eyheramendy, & Sosson 2019)…”

Section: Discussionmentioning

confidence: 99%

A constitutive model for rubber bearings subjected to combined compression and shear

Bouaziz¹,

Ovalle²,

Laiarinandrasana³

2019

Constitutive Models for Rubber XI

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This paper focuses on the finite strain thermo-mechanical modelling of the dynamical behaviour of filled rubbers under combined compression and shear using a multiphysics coupling approach. The mechanical behaviour of such materials depends on the network evolution due to thermo-mechanical loadings and the external environmental conditions (oxidation, ageing ...). An experimental campaign including tensile, compression/shear and compression/torsion tests allows the study of the impact of thermal ageing on the material properties, namely the bulk modulus and the shear modulus. This experimental investigation is dedicated to characterize the relationship between the hydrostatic pressure versus the volume change and the isochoric visco-hyperelastic behaviour as a function of ageing.

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“…The development of constitutive laws for rubber materials are based upon the mechanics of continuous media and the thermodynamics framework under the assumption of finite strain. Hyperelasticity is the general framework which is used to build constitutive models allowing the derivation of stresses and strains for such materials (Bouaziz et al, 2019;Rosendahl et al, 2019;Zhong et al, 2019). It postulates the existence of a strain energy density function W which corresponds to the Helmholtz free energy ψ.…”

Section: Energy Limiter Approachmentioning

confidence: 99%

A unified mechanical based approach to fracture properties estimates of rubbers subjected to aging

Kadri

Naït-Abdelaziz

Fayolle

et al. 2022

International Journal of Solids and Structures

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Characterization and modeling of filled rubber submitted to thermal aging

Cited by 24 publications

References 29 publications

Elastic Properties of Polychloroprene Rubbers in Tension and Compression during Ageing

Elastic Properties of Polychloroprene Rubbers in Tension and Compression during Ageing

A constitutive model for rubber bearings subjected to combined compression and shear

A unified mechanical based approach to fracture properties estimates of rubbers subjected to aging

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