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Modelling multi-scale deformation of amorphous glassy polymers with experimentally motivated evolution of the microstructure

Engqvist, Jonas LU ; Wallin, Mathias LU ; Ristinmaa, Matti LU ; Hall, Stephen LU and Plivelic, Tomás LU (2016) In Journal of the Mechanics and Physics of Solids 96(November). p.497-510
Abstract
Novel experimental data, obtained recently using advanced multi-scale experiments, have been used to develop a micro-mechanically motivated constitutive model for amorphous glassy polymers. Taking advantage of the experiments, the model makes use of a microstructural deformation gradient to incorporate the experimentally obtained deformation of the microstructure, as well as its evolving orientation. By comparing results from the model to experimental data, it is shown that the proposed approach is able to accurately predict glassy polymer deformation over a wide range of length-scales, from the macroscopic response (mm range) down to the deformation of the microstructure (nm range). The proposed model is evaluated by comparing the... (More)
Novel experimental data, obtained recently using advanced multi-scale experiments, have been used to develop a micro-mechanically motivated constitutive model for amorphous glassy polymers. Taking advantage of the experiments, the model makes use of a microstructural deformation gradient to incorporate the experimentally obtained deformation of the microstructure, as well as its evolving orientation. By comparing results from the model to experimental data, it is shown that the proposed approach is able to accurately predict glassy polymer deformation over a wide range of length-scales, from the macroscopic response (mm range) down to the deformation of the microstructure (nm range). The proposed model is evaluated by comparing the numerical response to experimental results on multiple scales from an inhomogeneous cold drawing experiment of glassy polycarbonate. Besides the macroscopic force–displacement response, a qualitative comparison of the deformation field at the surface of the specimen is performed. Furthermore, the predicted evolution of the fabric orientation is compared to experimental results obtained from X-ray scattering experiments. The model shows very good agreement with the experimental data over a wide range of length scales. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of the Mechanics and Physics of Solids
volume
96
issue
November
pages
13 pages
publisher
Elsevier
external identifiers
  • scopus:84983542655
  • wos:000386744600028
ISSN
0022-5096
DOI
10.1016/j.jmps.2016.08.005
language
English
LU publication?
yes
id
a8e62a40-2021-41d7-ac28-88c5408f639f
date added to LUP
2016-09-08 15:31:25
date last changed
2017-09-18 11:29:22
@article{a8e62a40-2021-41d7-ac28-88c5408f639f,
  abstract     = {Novel experimental data, obtained recently using advanced multi-scale experiments, have been used to develop a micro-mechanically motivated constitutive model for amorphous glassy polymers. Taking advantage of the experiments, the model makes use of a microstructural deformation gradient to incorporate the experimentally obtained deformation of the microstructure, as well as its evolving orientation. By comparing results from the model to experimental data, it is shown that the proposed approach is able to accurately predict glassy polymer deformation over a wide range of length-scales, from the macroscopic response (mm range) down to the deformation of the microstructure (nm range). The proposed model is evaluated by comparing the numerical response to experimental results on multiple scales from an inhomogeneous cold drawing experiment of glassy polycarbonate. Besides the macroscopic force–displacement response, a qualitative comparison of the deformation field at the surface of the specimen is performed. Furthermore, the predicted evolution of the fabric orientation is compared to experimental results obtained from X-ray scattering experiments. The model shows very good agreement with the experimental data over a wide range of length scales.},
  author       = {Engqvist, Jonas and Wallin, Mathias and Ristinmaa, Matti and Hall, Stephen and Plivelic, Tomás},
  issn         = {0022-5096},
  language     = {eng},
  number       = {November},
  pages        = {497--510},
  publisher    = {Elsevier},
  series       = {Journal of the Mechanics and Physics of Solids},
  title        = {Modelling multi-scale deformation of amorphous glassy polymers with experimentally motivated evolution of the microstructure},
  url          = {http://dx.doi.org/10.1016/j.jmps.2016.08.005},
  volume       = {96},
  year         = {2016},
}