A novel image-based inertial impact test (IBII) for the transverse properties of composites at high strain rates
A novel image-based inertial impact test (IBII) for the transverse properties of composites at high strain rates
Current methods for testing the high strain rate properties of composites require multiple assumptions that limit achievable strain rates. Therefore, this study presents a new method for testing the transverse properties of composites at high strain rates using ultra-high speed imaging. The image-based inertial impact test developed here uses the reflection of a compressive stress wave to generate tensile stress in the specimen. Throughout the test, full-field displacement measurements are taken. The acceleration and strain fields are then derived from the displacement fields. The acceleration is then used to calculate the average stress in the specimen. This paper describes the optimisation of the experimental configuration using simulations and the experimental validation of the technique. The elastic modulus and tensile strength were identified at strain rates of ∼ 2000 s−1 . The results showed an increase of 8% in elastic modulus and an increase of 57% in strength compared to quasi-static values.
Composites, Full-field measurement, High strain rate, Tensile strength, Virtual fields method
65-92
Fletcher, L.
48dca64b-f93c-4655-9205-eaf4e74be90c
Van-Blitterswyk, J.
d113eca6-6ee0-4f0e-a983-b5636fadbd71
Pierron, F.
a1fb4a70-6f34-4625-bc23-fcb6996b79b4
1 March 2019
Fletcher, L.
48dca64b-f93c-4655-9205-eaf4e74be90c
Van-Blitterswyk, J.
d113eca6-6ee0-4f0e-a983-b5636fadbd71
Pierron, F.
a1fb4a70-6f34-4625-bc23-fcb6996b79b4
Fletcher, L., Van-Blitterswyk, J. and Pierron, F.
(2019)
A novel image-based inertial impact test (IBII) for the transverse properties of composites at high strain rates.
Journal of Dynamic Behavior of Materials, 5 (1), .
(doi:10.1007/s40870-019-00186-y).
Abstract
Current methods for testing the high strain rate properties of composites require multiple assumptions that limit achievable strain rates. Therefore, this study presents a new method for testing the transverse properties of composites at high strain rates using ultra-high speed imaging. The image-based inertial impact test developed here uses the reflection of a compressive stress wave to generate tensile stress in the specimen. Throughout the test, full-field displacement measurements are taken. The acceleration and strain fields are then derived from the displacement fields. The acceleration is then used to calculate the average stress in the specimen. This paper describes the optimisation of the experimental configuration using simulations and the experimental validation of the technique. The elastic modulus and tensile strength were identified at strain rates of ∼ 2000 s−1 . The results showed an increase of 8% in elastic modulus and an increase of 57% in strength compared to quasi-static values.
Text
Fletcher 2019 Article A Novel Image-Based Inertial Impact
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Accepted/In Press date: 23 January 2019
e-pub ahead of print date: 6 February 2019
Published date: 1 March 2019
Keywords:
Composites, Full-field measurement, High strain rate, Tensile strength, Virtual fields method
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Local EPrints ID: 428369
URI: http://eprints.soton.ac.uk/id/eprint/428369
ISSN: 2199-7446
PURE UUID: 0306501b-d4d4-4784-804d-5931284a65f1
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Date deposited: 22 Feb 2019 17:30
Last modified: 16 Mar 2024 04:02
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Author:
J. Van-Blitterswyk
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