Software Implementation of the Virtual Fields Method


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The virtual fields method is a tool dedicated to the identification of the mechanical properties of materials from full-field deformation measurements. It is now validated in elasticity and plasticity but one of the remaining problems is the fact that researchers wanting to use the method must invest significant time in order to programme the routines. To help them, a software called CamFit has been developed. The purpose of this paper is to present this software. It is based on MATLAB® and uses a graphical pre-processing interface to produce the geometry, the conditions on the virtual fields, to choose the type of behaviour etc... Then, series of displacement maps are uploaded and the identification is launched. Since no iterative solution of the direct problem is required, computation times are very small compared to updating techniques. An important step in the procedure is the smoothing of the displacement measurements to produce strains. FE based approximations are presently available in the software. The final purpose is to introduce the software onto the market. This will be done in the very near future.



Edited by:

J. Quinta da Fonseca




V. Tran et al., "Software Implementation of the Virtual Fields Method ", Applied Mechanics and Materials, Vols. 7-8, pp. 57-62, 2007

Online since:

August 2007




[1] Rastogi, P.K. Photomechanics. Springer, (2000).

[2] Grédiac, M. Principe des travaux virtuels et identification. Comptes Rendus de l'Académie des Sciences, 309: 1-5, (1989).

[3] Grédiac M., Pierron F., Avril S., Toussaint E., The virtual fields method for extracting constitutive parameters from full-field measurements: a review', Strain, 42: 233-253, (2006).

DOI: 10.1111/j.1475-1305.2006.00283.x

[4] Chalal H., Avril S., Pierron F., Meraghni F., Experimental identification of a damage model for composites using the grid technique coupled to the virtual fields method. Composites Part A: Applied Science and Manufacturing, 37: 315-325, (2006).

DOI: 10.1016/j.compositesa.2005.04.020

[5] Moulart R., Avril S., Pierron F., Identification of the through-thickness rigidities of a thick laminated composite tube, Composites Part A: Applied Science and Manufacturing, 37: 326-336, (2006).

DOI: 10.1016/j.compositesa.2005.05.050

[6] Pannier Y., Avril S., Rotinat R., Pierron F., Identification of elasto-plastic constitutive parameters from statically undetermined tests using the virtual fields method, Experimental Mechanics, 46(6): 735-755, (2006).

DOI: 10.1007/s11340-006-9822-x

[7] Avril, S., Grédiac, M., and Pierron, F. Sensitivity of the virtual fields method to noisy data. Computational Mechanics, 34(6): 439-452, (2004).

DOI: 10.1007/s00466-004-0589-6

[8] Avril, S., Pierron, F., General framework for the identification of constitutive parameters from full-field measurements in linear elasticity, International Journal of Solids and Structures, 44: 4978-5002, (2007).

DOI: 10.1016/j.ijsolstr.2006.12.018

[9] Avril, S., Pierron, F., Yan, J., Sutton, M., Identification of strain-rate sensitivity with the virtual fields method. In Gdoutos E., editor, Proceedings of ICEM13, Alexandoupolis (Greece), 2007. 6.

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