The off-axis IBII test for composites
The off-axis IBII test for composites
Composite components regularly experience dynamic loads in service. Despite this, it is still difficult to obtain accurate mechanical properties of composite materials under high strain rate conditions. In this study, a new application of the Image-Based Inertial Impact (IBII) test methodology was developed, to generate an accurate in-plane transverse and shear moduli dataset from unidirectional (UD) off-axis composite specimens. The obtained dataset was consistent across different sample configurations, where results from the UD45^{\circ } off-axis specimens agreed well with the UD90^{\circ } values. Validation of the shear modulus identification was also undertaken by comparing the results from the UD90^{\circ } and UD45^{\circ } specimens with a multi-directional (MD) configuration. Here, it was found that MD±45^{\circ } specimen shear modulus values where marginally lower than that from the UD specimens, in accordance with the lower fibre volume fraction of the MD laminate. Low strain rate sensitivities in the 0.5-2\times10^{3} \hbox {s}^{-1} regime evidenced in this work suggest previously published data (often from split-Hopkinson bar tests) may include both a material and system i.e. testing apparatus response.
127–155
Parry, Samuel Laurence
b9af8a54-fb0e-4a8e-ae2e-7a77f60ce1b1
Fletcher, Lloyd
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Pierron, Fabrice
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Parry, Samuel Laurence
b9af8a54-fb0e-4a8e-ae2e-7a77f60ce1b1
Fletcher, Lloyd
48dca64b-f93c-4655-9205-eaf4e74be90c
Pierron, Fabrice
a1fb4a70-6f34-4625-bc23-fcb6996b79b4
Parry, Samuel Laurence, Fletcher, Lloyd and Pierron, Fabrice
(2020)
The off-axis IBII test for composites.
Journal of Dynamic Behavior of Materials, 7, .
(doi:10.1007/s40870-020-00271-7).
Abstract
Composite components regularly experience dynamic loads in service. Despite this, it is still difficult to obtain accurate mechanical properties of composite materials under high strain rate conditions. In this study, a new application of the Image-Based Inertial Impact (IBII) test methodology was developed, to generate an accurate in-plane transverse and shear moduli dataset from unidirectional (UD) off-axis composite specimens. The obtained dataset was consistent across different sample configurations, where results from the UD45^{\circ } off-axis specimens agreed well with the UD90^{\circ } values. Validation of the shear modulus identification was also undertaken by comparing the results from the UD90^{\circ } and UD45^{\circ } specimens with a multi-directional (MD) configuration. Here, it was found that MD±45^{\circ } specimen shear modulus values where marginally lower than that from the UD specimens, in accordance with the lower fibre volume fraction of the MD laminate. Low strain rate sensitivities in the 0.5-2\times10^{3} \hbox {s}^{-1} regime evidenced in this work suggest previously published data (often from split-Hopkinson bar tests) may include both a material and system i.e. testing apparatus response.
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modulusPaper_verFinalJournal_Rev2
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Accepted/In Press date: 3 September 2020
e-pub ahead of print date: 20 October 2020
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Local EPrints ID: 443868
URI: http://eprints.soton.ac.uk/id/eprint/443868
ISSN: 2199-7446
PURE UUID: fb0f58df-2b49-481d-8a32-458315752b02
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Date deposited: 15 Sep 2020 16:32
Last modified: 17 Mar 2024 03:20
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Author:
Samuel Laurence Parry
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