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Image-based inertial impact test for composite interlaminar tensile properties

Image-based inertial impact test for composite interlaminar tensile properties
Image-based inertial impact test for composite interlaminar tensile properties
In this work an image-based inertial impact test is proposed to measure the interlaminar tensile stiffness and strength of fibre-reinforced polymer composite materials at high strain rates. The principle is to combine ultra-high-speed imaging and full-field measurements to capture the dynamic kinematic fields and exploit the inertial effects generated under high strain rate loading. The kinematic fields are processed using the virtual fields method to reconstruct stress averages from maps of acceleration. In this way, the specimen acts like a dynamic load cell, with no gripping or external force measurement required. Stress averages are combined with strain measurements to construct stress–strain curves and identify the interlaminar stiffness and tensile strength. Special optimised virtual fields are also implemented to identify interlaminar stiffness parameters from complete maps of strain and acceleration. Interlaminar stiffness and tensile strength are successfully identified at average, peak strain rates on the order 3500 s −1 and 5000 s −1 , respectively. Results show an increase in stiffness between 30 and 35%, and an increase in strength of 125% compared to quasi-static values.
2199-7446
1-30
Van Blitterswyk, Jared
d113eca6-6ee0-4f0e-a983-b5636fadbd71
Fletcher, Lloyd
48dca64b-f93c-4655-9205-eaf4e74be90c
Pierron, Fabrice
a1fb4a70-6f34-4625-bc23-fcb6996b79b4
Van Blitterswyk, Jared
d113eca6-6ee0-4f0e-a983-b5636fadbd71
Fletcher, Lloyd
48dca64b-f93c-4655-9205-eaf4e74be90c
Pierron, Fabrice
a1fb4a70-6f34-4625-bc23-fcb6996b79b4

Van Blitterswyk, Jared, Fletcher, Lloyd and Pierron, Fabrice (2018) Image-based inertial impact test for composite interlaminar tensile properties. Journal of Dynamic Behavior of Materials, 1-30. (doi:10.1007/s40870-018-0175-1).

Record type: Article

Abstract

In this work an image-based inertial impact test is proposed to measure the interlaminar tensile stiffness and strength of fibre-reinforced polymer composite materials at high strain rates. The principle is to combine ultra-high-speed imaging and full-field measurements to capture the dynamic kinematic fields and exploit the inertial effects generated under high strain rate loading. The kinematic fields are processed using the virtual fields method to reconstruct stress averages from maps of acceleration. In this way, the specimen acts like a dynamic load cell, with no gripping or external force measurement required. Stress averages are combined with strain measurements to construct stress–strain curves and identify the interlaminar stiffness and tensile strength. Special optimised virtual fields are also implemented to identify interlaminar stiffness parameters from complete maps of strain and acceleration. Interlaminar stiffness and tensile strength are successfully identified at average, peak strain rates on the order 3500 s −1 and 5000 s −1 , respectively. Results show an increase in stiffness between 30 and 35%, and an increase in strength of 125% compared to quasi-static values.

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Accepted/In Press date: 1 September 2018
e-pub ahead of print date: 11 September 2018

Identifiers

Local EPrints ID: 423771
URI: http://eprints.soton.ac.uk/id/eprint/423771
ISSN: 2199-7446
PURE UUID: a723c5c6-d8eb-416f-9c65-6e2f25d5c2ec
ORCID for Fabrice Pierron: ORCID iD orcid.org/0000-0003-2813-4994

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Date deposited: 01 Oct 2018 16:30
Last modified: 17 Dec 2019 01:41

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Contributors

Author: Jared Van Blitterswyk
Author: Lloyd Fletcher
Author: Fabrice Pierron ORCID iD

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