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Full-field strain measurement and identification of composites moduli at high strain rate with the virtual fields method

Full-field strain measurement and identification of composites moduli at high strain rate with the virtual fields method
Full-field strain measurement and identification of composites moduli at high strain rate with the virtual fields method
The present paper deals with full-field strain measurement on glass/epoxy composite tensile specimens submitted to high strain rate loading through a split Hopkinson pressure bar (SHPB) device and with the identification of their mechanical properties. First, the adopted methodology is presented: the device, including an Ultra-High Speed camera, and the experimental procedure to obtain relevant displacement maps are described. The different full-field results including displacement, strain and acceleration maps for two mechanical tests are then addressed. The last part of the paper deals with an original procedure to identify stiffnesses on this dynamic case only using the actual strain and acceleration maps (without the applied force) by using the Virtual Fields Method. The results provide very promising values of Young’s modulus and Poisson’s ratio on a quasi-isotropic glass-epoxy laminate. The load reconstructed from the moduli and strains compares favourably with that from the readings
full-field measurement, high strain rate, UHS camera, grid method, SHPB, virtual fields method, fibre composites
1741-2765
509-536
Moulart, R.
de193fb9-540d-4d36-a519-4f48eb2fc616
Pierron, F.
a1fb4a70-6f34-4625-bc23-fcb6996b79b4
Hallett, S. R.
0174ab05-eb51-40b6-9974-1d622be4a592
Wisnom, M. R.
655f9d97-0d4c-4654-9b0e-3e5150991e42
Moulart, R.
de193fb9-540d-4d36-a519-4f48eb2fc616
Pierron, F.
a1fb4a70-6f34-4625-bc23-fcb6996b79b4
Hallett, S. R.
0174ab05-eb51-40b6-9974-1d622be4a592
Wisnom, M. R.
655f9d97-0d4c-4654-9b0e-3e5150991e42

Moulart, R., Pierron, F., Hallett, S. R. and Wisnom, M. R. (2011) Full-field strain measurement and identification of composites moduli at high strain rate with the virtual fields method. Experimental Mechanics, 51 (4), 509-536. (doi:10.1007/s11340-010-9433-4).

Record type: Article

Abstract

The present paper deals with full-field strain measurement on glass/epoxy composite tensile specimens submitted to high strain rate loading through a split Hopkinson pressure bar (SHPB) device and with the identification of their mechanical properties. First, the adopted methodology is presented: the device, including an Ultra-High Speed camera, and the experimental procedure to obtain relevant displacement maps are described. The different full-field results including displacement, strain and acceleration maps for two mechanical tests are then addressed. The last part of the paper deals with an original procedure to identify stiffnesses on this dynamic case only using the actual strain and acceleration maps (without the applied force) by using the Virtual Fields Method. The results provide very promising values of Young’s modulus and Poisson’s ratio on a quasi-isotropic glass-epoxy laminate. The load reconstructed from the moduli and strains compares favourably with that from the readings

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More information

e-pub ahead of print date: 13 November 2010
Published date: April 2011
Keywords: full-field measurement, high strain rate, UHS camera, grid method, SHPB, virtual fields method, fibre composites
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 210593
URI: https://eprints.soton.ac.uk/id/eprint/210593
ISSN: 1741-2765
PURE UUID: 3e0f0268-524b-423d-83d4-ce6a43ab86c5
ORCID for F. Pierron: ORCID iD orcid.org/0000-0003-2813-4994

Catalogue record

Date deposited: 10 Feb 2012 15:33
Last modified: 24 Sep 2019 00:41

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