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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
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
2199-7446
65-92
Fletcher, L.
48dca64b-f93c-4655-9205-eaf4e74be90c
Van-Blitterswyk, J.
d113eca6-6ee0-4f0e-a983-b5636fadbd71
Pierron, F.
a1fb4a70-6f34-4625-bc23-fcb6996b79b4
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), 65-92. (doi:10.1007/s40870-019-00186-y).

Record type: Article

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.

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Fletcher 2019 Article A Novel Image-Based Inertial Impact - Version of Record
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More information

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

Identifiers

Local EPrints ID: 428369
URI: http://eprints.soton.ac.uk/id/eprint/428369
ISSN: 2199-7446
PURE UUID: 0306501b-d4d4-4784-804d-5931284a65f1
ORCID for F. Pierron: ORCID iD orcid.org/0000-0003-2813-4994

Catalogue record

Date deposited: 22 Feb 2019 17:30
Last modified: 15 Sep 2021 01:56

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