Journal article 958 views
Modelling the curing process in magneto-sensitive polymers: Rate-dependence and shrinkage
,
Prashant Saxena
International Journal of Non-Linear Mechanics, Volume: 74, Issue: -, Pages: 108 - 121
Swansea University Author:
Mokarram Hossain
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DOI (Published version): 10.1016/j.ijnonlinmec.2015.04.008
Abstract
This paper deals with a phenomenologically motivated magneto-viscoelastic coupled finite strain framework for simulating the curing process of polymers under the application of a coupled magneto-mechanical load. Magneto-sensitive polymers are prepared by mixing micron-sized ferromagnetic particles i...
| Published in: | International Journal of Non-Linear Mechanics |
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| Published: |
Elsevier-London
Elsevier
2015
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| Online Access: |
https://www.sciencedirect.com/science/article/pii/S0020746215000797#! |
| URI: | https://cronfa.swan.ac.uk/Record/cronfa39635 |
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| Abstract: |
This paper deals with a phenomenologically motivated magneto-viscoelastic coupled finite strain framework for simulating the curing process of polymers under the application of a coupled magneto-mechanical load. Magneto-sensitive polymers are prepared by mixing micron-sized ferromagnetic particles in uncured polymers. Application of a magnetic field during the curing process causes the particles to align and form chain-like structures lending an overall anisotropy to the material. The polymer curing is a viscoelastic complex process where a transformation from fluid to solid occurs in the course of time. During curing, volume shrinkage also occurs due to the packing of polymer chains by chemical reactions. Such reactions impart a continuous change of magneto-mechanical properties that can be modelled by an appropriate constitutive relation where the temporal evolution of material parameters is considered. To model the shrinkage during curing, a magnetic-induction-dependent approach is proposed which is based on a multiplicative decomposition of the deformation gradient into a mechanical and a magnetic-induction-dependent volume shrinkage part. The proposed model obeys the relevant laws of thermodynamics. Numerical examples, based on a generalised Mooney–Rivlin energy function, are presented to demonstrate the model capacity in the case of a magneto-viscoelastically coupled load. |
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| Keywords: |
Magneto-sensitive polymers, Polymer curing, Magneto-mechanical coupled problem, Magneto-viscoelasticity, Curing shrinkage |
| College: |
Faculty of Science and Engineering |
| Issue: |
- |
| Start Page: |
108 |
| End Page: |
121 |