The University of Southampton
University of Southampton Institutional Repository

Experimental identification of a nonlinear model for composites using the grid technique coupled to the virtual fields method

Experimental identification of a nonlinear model for composites using the grid technique coupled to the virtual fields method
Experimental identification of a nonlinear model for composites using the grid technique coupled to the virtual fields method
The present paper shows some experimental results of the identification of the full set of parameters driving a nonlinear model for the inplane behaviour of a unidirectional composite laminate. The strain field at the surface of a rectangular coupon submitted to a shear/bending loading is measured using the grid technique. The strain fields are then processed by the virtual fields method to retrieve the six constitutive parameters: the linear elastic orthotropic in-plane stiffnesses Qxx, Qyy, Qxy, Qss and softening parameters K and ?0s driving the shear nonlinearity. It is shown that the shear response is correctly identified, with coefficients of variation similar to the ones of standard tests. The other parameters are identified with larger errors and higher coefficients of variation because their identification is affected by the lower normal strain levels in the specimen. It is therefore necessary to design new tests providing balanced strain levels for improving the identification procedure.
optical techniques, damage mechanics, mechanical testing, virtual fields method
1359-835X
315-325
Chalal, H.
ac4c29d0-300b-4597-a4ed-4c1a64963468
Avril, S.
6c8490e9-2ae9-41c3-9bf8-bfbb3836c097
Pierron, F.
a1fb4a70-6f34-4625-bc23-fcb6996b79b4
Meraghni, F.
36f601a6-e7ba-4020-9d67-bf18e6e9ade0
Chalal, H.
ac4c29d0-300b-4597-a4ed-4c1a64963468
Avril, S.
6c8490e9-2ae9-41c3-9bf8-bfbb3836c097
Pierron, F.
a1fb4a70-6f34-4625-bc23-fcb6996b79b4
Meraghni, F.
36f601a6-e7ba-4020-9d67-bf18e6e9ade0

Chalal, H., Avril, S., Pierron, F. and Meraghni, F. (2006) Experimental identification of a nonlinear model for composites using the grid technique coupled to the virtual fields method. Composites Part A: Applied Science and Manufacturing, 37 (2), 315-325. (doi:10.1016/j.compositesa.2005.04.020).

Record type: Article

Abstract

The present paper shows some experimental results of the identification of the full set of parameters driving a nonlinear model for the inplane behaviour of a unidirectional composite laminate. The strain field at the surface of a rectangular coupon submitted to a shear/bending loading is measured using the grid technique. The strain fields are then processed by the virtual fields method to retrieve the six constitutive parameters: the linear elastic orthotropic in-plane stiffnesses Qxx, Qyy, Qxy, Qss and softening parameters K and ?0s driving the shear nonlinearity. It is shown that the shear response is correctly identified, with coefficients of variation similar to the ones of standard tests. The other parameters are identified with larger errors and higher coefficients of variation because their identification is affected by the lower normal strain levels in the specimen. It is therefore necessary to design new tests providing balanced strain levels for improving the identification procedure.

Full text not available from this repository.

More information

e-pub ahead of print date: 8 August 2005
Published date: February 2006
Keywords: optical techniques, damage mechanics, mechanical testing, virtual fields method
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 210651
URI: http://eprints.soton.ac.uk/id/eprint/210651
ISSN: 1359-835X
PURE UUID: 72ea9d0b-3298-43b5-bd97-4a5e83eaabfa
ORCID for F. Pierron: ORCID iD orcid.org/0000-0003-2813-4994

Catalogue record

Date deposited: 09 Mar 2012 16:42
Last modified: 10 Dec 2019 01:39

Export record

Altmetrics

Contributors

Author: H. Chalal
Author: S. Avril
Author: F. Pierron ORCID iD
Author: F. Meraghni

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×