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Micromechanically Motivated Model for Oxidation Ageing of Elastomers

Beurle, Darcy ; André, Markus ; Nackenhorst, Udo ; Desmorat, Rodrigue

Virtual Design and Validation, 2020, Vol.93, p.271-290

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Título:
Micromechanically Motivated Model for Oxidation Ageing of Elastomers
Autor: Beurle, Darcy ; André, Markus ; Nackenhorst, Udo ; Desmorat, Rodrigue
Assuntos: Mechanics ; Mechanics of materials ; Physics
É parte de: Virtual Design and Validation, 2020, Vol.93, p.271-290
Descrição: The oxidative ageing behaviour of elastomers is of concern for product lifetime analysis and the prediction of degradation effects such as stress-softening and permanent set. Two main reactions occur during oxidative ageing; chain scission and cross-link formation which result in stress-softening, stiffening and the permanent set effect. In this model, a network dynamics model is introduced to capture the changes in polymer network topology due to chain scission and cross-link formation. The network dynamics are coupled through the shear modulus to a micro-mechanically motivated constitutive model based on the micro-sphere model using a multiplicative decomposition to capture secondary network effects. A novel mapping technique allows the degradation of both the primary and secondary networks to be efficiently handled. Numerical results indicate agreement with experimental results and show improvements over current computational approaches.
Títulos relacionados: Lecture Notes in Applied and Computational Mechanics
Editor: Cham: Springer International Publishing
Idioma: Inglês

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