Details
| Original language | English |
|---|---|
| Title of host publication | Constitutive Models for Rubber XI |
| Subtitle of host publication | Proceedings of the 11th European Conference on Constitutive Models for Rubber, 2019 |
| Editors | Bertrand Huneau, Jean-Benoit Le Cam, Yann Marco, Erwan Verron |
| Place of Publication | London |
| Pages | 566-571 |
| Number of pages | 6 |
| Edition | 1. |
| ISBN (electronic) | 9780429324710 |
| Publication status | Published - 2019 |
| Event | 11th European Conference on Constitutive Models for Rubber, 2019 - Nantes, France Duration: 25 Jun 2019 → 27 Jun 2019 |
Abstract
Elastomer degradation occurs in several critical engineering components such as seals and mounts. Chemical ageing is classified as the irreversible change in material properties caused by microstructural changes to the underlying polymer network. In this work we present a micromechanically motivated model for predicting the response of elastomers during chemical ageing. Splitting the polymer into an active and inactive chain set leads to a system of non-linear coupled differential equations describing the network degradation dynamics and the corresponding effect on the cross-link density and average polymer length. During ageing two main effects occur; stress softening due to chain scission and permanent set caused by stress free secondary network formation. Stress softening is modelled using the relationship between the shear modulus and the cross-link density as obtained from the network degradation dynamics. Stress free secondary network formation is modelled through the use of intermediate configurations where new chains are created. The resulting stresses are pushed forward to the current configuration and integrated over time. This model is then placed into the finite element framework with the aid of the microsphere model. Stress relaxation, stress free secondary network formation and the permanent set effect are observed in numerical experiments of a uniaxial test specimen and an industrially relevant automotive component.
ASJC Scopus subject areas
- Materials Science(all)
- Polymers and Plastics
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Constitutive Models for Rubber XI: Proceedings of the 11th European Conference on Constitutive Models for Rubber, 2019. ed. / Bertrand Huneau; Jean-Benoit Le Cam; Yann Marco; Erwan Verron. 1. ed. London, 2019. p. 566-571.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Micro-mechanically based modelling of homogeneous ageing of elastomers
AU - Beurle, Darcy
AU - André, Markus
AU - Nackenhorst, Udo
AU - Desmorat, Rodrigue
PY - 2019
Y1 - 2019
N2 - Elastomer degradation occurs in several critical engineering components such as seals and mounts. Chemical ageing is classified as the irreversible change in material properties caused by microstructural changes to the underlying polymer network. In this work we present a micromechanically motivated model for predicting the response of elastomers during chemical ageing. Splitting the polymer into an active and inactive chain set leads to a system of non-linear coupled differential equations describing the network degradation dynamics and the corresponding effect on the cross-link density and average polymer length. During ageing two main effects occur; stress softening due to chain scission and permanent set caused by stress free secondary network formation. Stress softening is modelled using the relationship between the shear modulus and the cross-link density as obtained from the network degradation dynamics. Stress free secondary network formation is modelled through the use of intermediate configurations where new chains are created. The resulting stresses are pushed forward to the current configuration and integrated over time. This model is then placed into the finite element framework with the aid of the microsphere model. Stress relaxation, stress free secondary network formation and the permanent set effect are observed in numerical experiments of a uniaxial test specimen and an industrially relevant automotive component.
AB - Elastomer degradation occurs in several critical engineering components such as seals and mounts. Chemical ageing is classified as the irreversible change in material properties caused by microstructural changes to the underlying polymer network. In this work we present a micromechanically motivated model for predicting the response of elastomers during chemical ageing. Splitting the polymer into an active and inactive chain set leads to a system of non-linear coupled differential equations describing the network degradation dynamics and the corresponding effect on the cross-link density and average polymer length. During ageing two main effects occur; stress softening due to chain scission and permanent set caused by stress free secondary network formation. Stress softening is modelled using the relationship between the shear modulus and the cross-link density as obtained from the network degradation dynamics. Stress free secondary network formation is modelled through the use of intermediate configurations where new chains are created. The resulting stresses are pushed forward to the current configuration and integrated over time. This model is then placed into the finite element framework with the aid of the microsphere model. Stress relaxation, stress free secondary network formation and the permanent set effect are observed in numerical experiments of a uniaxial test specimen and an industrially relevant automotive component.
UR - http://www.scopus.com/inward/record.url?scp=85079245371&partnerID=8YFLogxK
U2 - 10.1201/9780429324710-100
DO - 10.1201/9780429324710-100
M3 - Conference contribution
AN - SCOPUS:85079245371
SN - 9780367342586
SP - 566
EP - 571
BT - Constitutive Models for Rubber XI
A2 - Huneau, Bertrand
A2 - Le Cam, Jean-Benoit
A2 - Marco, Yann
A2 - Verron, Erwan
CY - London
T2 - 11th European Conference on Constitutive Models for Rubber, 2019
Y2 - 25 June 2019 through 27 June 2019
ER -