Micromechanically Motivated Model for Oxidation Ageing of Elastomers

  • Darcy BeurleEmail author
  • Markus André
  • Udo Nackenhorst
  • Rodrigue Desmorat
Part of the Lecture Notes in Applied and Computational Mechanics book series (LNACM, volume 93)


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.



The authors would like to kindly acknowledge the funding by the DFG (Deutsche Forschungs Gemeinschaft) in the IRTG1627 framework.


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© Springer Nature Switzerland AG 2020

Authors and Affiliations

  • Darcy Beurle
    • 1
    Email author
  • Markus André
    • 2
  • Udo Nackenhorst
    • 1
  • Rodrigue Desmorat
    • 3
  1. 1.Institute for Mechanical and Computational MechanicsLeibniz Universität HannoverHannoverGermany
  2. 2.Faculty for Mechanical Engineering and BiotechnologyHochschule HannoverHannoverGermany
  3. 3.LMT, ENS CachanCNRS Université Paris SaclayCachanFrance

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