A projected finite element update method for inverse identification of material constitutive parameters in transversely isotropic laminates

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dc.contributor.authorSiddiqui, Muhammad Zeeshan
dc.contributor.authorKhan, Sohaib Zia
dc.contributor.authorKhan, Muhammad Ali
dc.contributor.authorKhan, Kamran Ahmed
dc.contributor.authorShahzad, Majid
dc.contributor.authorNisar, Salman
dc.contributor.authorNoman, Danish
dc.date.accessioned2017-03-24T13:22:45Z
dc.date.available2017-03-24T13:22:45Z
dc.date.issued2017-03-09
dc.description.abstractIn this paper, a novel application of Finite Element Update Method (FEUM) is proposed for the inverse identification of material constitutive parameters in transversely isotropic laminates. Two-dimensional Digital Image Correlation (2D–DIC) is used for full-field measurements which is required for the identification process. Instead of measuring the in-plane displacements, which is a well-known application of 2D–DIC, we seek to measure the pseudo-displacements resulting from out-of-plane (towards camera) deflection of plate under a point load. These pseudo-displacements are basically the perspective projection of the three dimensional displacement fields on the image-plane of the image acquisition system. The cost function in this method is defined in terms of these projections instead of the true displacements – and hence the name Projected Finite Element Update Method (PFEUM). In this article, identification of in-plane elastic moduli of Carbon Fiber Reinforced Plastic (CFRP) plate has been performed using plate bending experiments which show pre-dominantly out-of-plane deflection with little contribution from the in-plane displacements. Identification results are validated by direct experimental measurements of the unknown elastic constants as well as theoretical estimates based on volume ratio of constituents. The results show good conformance between estimated and target values for at least three material parameters namely E1, E2 and G12. Effects of experimental noise on parameter estimates has also been evaluated to explain the observed deviation in estimated parameters with current test configuration.en_UK
dc.identifier.citationSiddiqui, M., Khan, S.Z., Khan, M.A. et al. A projected finite element update method for inverse identification of material constitutive parameters in transversely isotropic laminates. Experimental Mechanics, 2017, Vol 57, Iss 5, pp755-772en_UK
dc.identifier.issn0014-4851
dc.identifier.urihttp://dx.doi.org/10.1007/s11340-017-0269-z
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/12442
dc.language.isoenen_UK
dc.publisherSpringeren_UK
dc.subject2D field measurementsen_UK
dc.subjectInverse identificationen_UK
dc.subjectFinite element model update methoden_UK
dc.subjectOut-of-plane motionen_UK
dc.subjectPerspective projectionen_UK
dc.subjectCost function minimizationen_UK
dc.titleA projected finite element update method for inverse identification of material constitutive parameters in transversely isotropic laminatesen_UK
dc.typeArticleen_UK

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