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Multi-scale in-situ experiments as basis for continuum modelling of polymers

Engqvist, Jonas LU ; Ristinmaa, Matti LU ; Wallin, Mathias LU and Hall, Stephen LU (2018) 6th European Conference on Computational Mechanics (ECCM 6)/7th European Conference on Computational Fluid Dynamics (ECFD 7)
Abstract
A firm understanding of the coupling between the deformation on different scales within a material is key when formulating multi-scale constitutive models. In many polymers, the macroscopic deformation is, to a large extent, dictated by the underlying molecular structure and how this evolves during loading. To gain information ab out the behaviour of the molecular structure during deformation, non-destructive methods such as X-ray scattering can be utilised. However, scattering experiments give indirect information about the microstructure and appropriate modelling tools are required to interpret the data. Moreover, many polymer materials often exhibit heterogeneous de formation phenomena at different length scales, rendering boundary... (More)
A firm understanding of the coupling between the deformation on different scales within a material is key when formulating multi-scale constitutive models. In many polymers, the macroscopic deformation is, to a large extent, dictated by the underlying molecular structure and how this evolves during loading. To gain information ab out the behaviour of the molecular structure during deformation, non-destructive methods such as X-ray scattering can be utilised. However, scattering experiments give indirect information about the microstructure and appropriate modelling tools are required to interpret the data. Moreover, many polymer materials often exhibit heterogeneous de formation phenomena at different length scales, rendering boundary measures insufficient to fully describe the material behaviour and full-field measuring techniques, such as digit al image correlation (DIC) and spatially resolved -ray scattering are required. This work will present an experimental protocol combining in-situ mechanical loading and full-field deformation measurements using DIC with X-ray scattering that enables deformation to be measured simultaneously over a wide range of length-scales, cf. [1]. It will be shown that using this technique it is possible to investigate the coupling of deformation phenomena observed at different scales. Moreover, the work will present modelling tools that utilise the information from the advanced multi-scale experimental technique to formulate constitutive models for polymers on the continuum scale. (Less)
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author
organization
publishing date
type
Contribution to conference
publication status
published
subject
keywords
Multi-scale experiment, X-ray scattering, Digital image correlation, continuum modelling
conference name
6th European Conference on Computational Mechanics (ECCM 6)/7th European Conference on Computational Fluid Dynamics (ECFD 7)
conference location
Glasgow, United Kingdom
conference dates
2018-06-11 - 2018-06-15
language
English
LU publication?
yes
id
fe089e7c-261c-4f68-b886-443276635b0c
date added to LUP
2018-06-19 17:51:22
date last changed
2018-11-21 21:40:27
@misc{fe089e7c-261c-4f68-b886-443276635b0c,
  abstract     = {A firm understanding of the coupling between the deformation on different scales within a material is key when formulating multi-scale constitutive models. In many polymers, the macroscopic deformation is, to a large extent, dictated by the underlying molecular structure and how this evolves during loading. To gain information ab out the behaviour of the molecular structure during deformation, non-destructive methods such as X-ray scattering can be utilised. However, scattering experiments give indirect information about the microstructure and appropriate modelling tools are required to interpret the data. Moreover, many polymer materials often exhibit heterogeneous de formation phenomena at different length scales, rendering boundary measures insufficient to fully describe the material behaviour and full-field measuring techniques, such as digit al image correlation (DIC) and spatially resolved -ray scattering are required. This work will present an experimental protocol combining in-situ mechanical loading and full-field deformation measurements using DIC with X-ray scattering that enables deformation to be measured simultaneously over a wide range of length-scales, cf. [1]. It will be shown that using this technique it is possible to investigate the coupling of deformation phenomena observed at different scales. Moreover, the work will present modelling tools that utilise the information from the advanced multi-scale experimental technique to formulate constitutive models for polymers on the continuum scale.  },
  author       = {Engqvist, Jonas and Ristinmaa, Matti and Wallin, Mathias and Hall, Stephen},
  keyword      = {Multi-scale experiment,X-ray scattering,Digital image correlation,continuum modelling},
  language     = {eng},
  location     = {Glasgow, United Kingdom},
  title        = {Multi-scale in-situ experiments as basis for continuum modelling of polymers},
  year         = {2018},
}