Modelling and experiments of glassy polymers using biaxial loading and digital image correlation
Engqvist, Jonas LU ; Wallin, Mathias LU ; Ristinmaa, Matti LU
and Hall, Stephen
LU
(2016)
In International Journal of Solids and Structures
102-103.
p.100-111
- Abstract
- Experimental data are needed to evaluate constitutive models. The richer the experimental data, in terms of different deformation modes for example, the better the constraints on the model. To this end, the mechanical response of glassy polycarbonate (PC) is studied using biaxial tension experiments with novel sample geometries. Deformation fields are measured using full-field digital image correlation (DIC) to reveal a large difference in the strain localisation behaviour of the material depending on the amount of lateral deformation. The difference in the localisation behaviour is also reflected in the macroscopic force-displacement response. The experimental data acquired in the experiments are used to examine the ability of a... (More)
- Experimental data are needed to evaluate constitutive models. The richer the experimental data, in terms of different deformation modes for example, the better the constraints on the model. To this end, the mechanical response of glassy polycarbonate (PC) is studied using biaxial tension experiments with novel sample geometries. Deformation fields are measured using full-field digital image correlation (DIC) to reveal a large difference in the strain localisation behaviour of the material depending on the amount of lateral deformation. The difference in the localisation behaviour is also reflected in the macroscopic force-displacement response. The experimental data acquired in the experiments are used to examine the ability of a physically-motivated constitutive model to predict the mechanical response of the material during biaxial deformation. To improve the numerical predictions, the elastic part of the constitutive model is modified such that the initial non-linear response due to volumetric deformation is accurately captured. This new elastic model is motivated by the experimental results, which show that the commonly used quadratic form of the elastic free energy results in a too stiff response during biaxial tension. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/bc4a2e24-dbd6-4fc4-8af6-66d5db790e67
- author
- Engqvist, Jonas
LU
; Wallin, Mathias
LU
; Ristinmaa, Matti
LU
and Hall, Stephen
LU
- organization
- publishing date
- 2016
- type
- Contribution to journal
- publication status
- published
- subject
- in
- International Journal of Solids and Structures
- volume
- 102-103
- pages
- 12 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:84995588325
- wos:000389390200010
- ISSN
- 0020-7683
- DOI
- 10.1016/j.ijsolstr.2016.10.013
- language
- English
- LU publication?
- yes
- id
- bc4a2e24-dbd6-4fc4-8af6-66d5db790e67
- date added to LUP
- 2016-11-18 09:27:49
- date last changed
- 2022-04-09 00:45:47
@article{bc4a2e24-dbd6-4fc4-8af6-66d5db790e67,
abstract = {{Experimental data are needed to evaluate constitutive models. The richer the experimental data, in terms of different deformation modes for example, the better the constraints on the model. To this end, the mechanical response of glassy polycarbonate (PC) is studied using biaxial tension experiments with novel sample geometries. Deformation fields are measured using full-field digital image correlation (DIC) to reveal a large difference in the strain localisation behaviour of the material depending on the amount of lateral deformation. The difference in the localisation behaviour is also reflected in the macroscopic force-displacement response. The experimental data acquired in the experiments are used to examine the ability of a physically-motivated constitutive model to predict the mechanical response of the material during biaxial deformation. To improve the numerical predictions, the elastic part of the constitutive model is modified such that the initial non-linear response due to volumetric deformation is accurately captured. This new elastic model is motivated by the experimental results, which show that the commonly used quadratic form of the elastic free energy results in a too stiff response during biaxial tension.}},
author = {{Engqvist, Jonas and Wallin, Mathias and Ristinmaa, Matti and Hall, Stephen}},
issn = {{0020-7683}},
language = {{eng}},
pages = {{100--111}},
publisher = {{Elsevier}},
series = {{International Journal of Solids and Structures}},
title = {{Modelling and experiments of glassy polymers using biaxial loading and digital image correlation}},
url = {{http://dx.doi.org/10.1016/j.ijsolstr.2016.10.013}},
doi = {{10.1016/j.ijsolstr.2016.10.013}},
volume = {{102-103}},
year = {{2016}},
}