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Direct identification of the damage behaviour of composite materials using the virtual fields method

Direct identification of the damage behaviour of composite materials using the virtual fields method
Direct identification of the damage behaviour of composite materials using the virtual fields method
In the present work the virtual fields method (VFM) has been used to extract the whole set of material parameters governing a nonlinear behaviour law for composite materials. The nonlinearity considered here is due to the damage inherent to the in-plane shear response. The identification method is performed by applying the principle of virtual work knowing the whole strain field onto the surface of a tested specimen. The test chosen here is a shear bending test using a rectangular coupon loaded in a Iosipescu fixture. To illustrate the capabilities of the method, the identification is performed on data provided by finite element simulations. First, the nonlinear finite element model is described. Then, numerical aspects of the VFM are discussed, in particular the stability of the technique with respect to noise in the data. Finally, first elements of test optimisation are given by studying the effect of the length of the active area and the effect of the material anisotropy. This work contributes to the development of the VFM as a tool adapted to the processing of full-field measurement to identify parameters from general constitutive equations.

1359-835X
841-848
Chalal, H.
ac4c29d0-300b-4597-a4ed-4c1a64963468
Meraghni, F.
36f601a6-e7ba-4020-9d67-bf18e6e9ade0
Pierron, F.
a1fb4a70-6f34-4625-bc23-fcb6996b79b4
Grédiac, M.
fa87acbc-25a4-4275-99fd-97d838e9f60e
Chalal, H.
ac4c29d0-300b-4597-a4ed-4c1a64963468
Meraghni, F.
36f601a6-e7ba-4020-9d67-bf18e6e9ade0
Pierron, F.
a1fb4a70-6f34-4625-bc23-fcb6996b79b4
Grédiac, M.
fa87acbc-25a4-4275-99fd-97d838e9f60e

Chalal, H., Meraghni, F., Pierron, F. and Grédiac, M. (2004) Direct identification of the damage behaviour of composite materials using the virtual fields method. Composites Part A: Applied Science and Manufacturing, 35 (7-8), 841-848. (doi:10.1016/j.compositesa.2004.01.011).

Record type: Article

Abstract

In the present work the virtual fields method (VFM) has been used to extract the whole set of material parameters governing a nonlinear behaviour law for composite materials. The nonlinearity considered here is due to the damage inherent to the in-plane shear response. The identification method is performed by applying the principle of virtual work knowing the whole strain field onto the surface of a tested specimen. The test chosen here is a shear bending test using a rectangular coupon loaded in a Iosipescu fixture. To illustrate the capabilities of the method, the identification is performed on data provided by finite element simulations. First, the nonlinear finite element model is described. Then, numerical aspects of the VFM are discussed, in particular the stability of the technique with respect to noise in the data. Finally, first elements of test optimisation are given by studying the effect of the length of the active area and the effect of the material anisotropy. This work contributes to the development of the VFM as a tool adapted to the processing of full-field measurement to identify parameters from general constitutive equations.

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Published date: 2004
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 210667
URI: https://eprints.soton.ac.uk/id/eprint/210667
ISSN: 1359-835X
PURE UUID: 23edd2f3-de3e-4dd2-8d3d-915e00cbca37
ORCID for F. Pierron: ORCID iD orcid.org/0000-0003-2813-4994

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Date deposited: 21 Feb 2012 11:58
Last modified: 06 Jun 2018 12:34

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Contributors

Author: H. Chalal
Author: F. Meraghni
Author: F. Pierron ORCID iD
Author: M. Grédiac

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