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An XFEM/CZM based inverse method for identification of composite failure parameters
Lyazid Bouhala, Ahmed Makradi, Salim Belouettar, Anis Younes,
Published in Elsevier Ltd
2015
Volume: 153
   
Pages: 91 - 97
Abstract
Abstract An experimental-numerical methodology for identification of mode I failure parameters, namely the critical strain energy release rate (GIc) and the strength (σc) of unidirectional carbon/epoxy composite is proposed. Using an inverse procedure, the experimental results of a double cantilever beam (DCB) test are used in conjunction with a counterpart extended finite element method (XFEM) cohesive zone model (CZM). In the developed numerical model, the notch and the crack path are located and enriched implicitly by a level set function and the crack propagation is controlled by a bi-linear cohesive law. The cost function accounts for the error between the numerical and the experimental results, and it is minimised in a least squares sense by updating the values of the two independent parameters. The determined critical strain energy release rate is then compared with the one obtained using the corrected beam theory (CBT), and the identified strength is compared with the one estimated experimentally. Globally, the results are very well in agreement and the proposed methodology seems to be efficient to determine accurately the composite failure parameters. © 2015 Elsevier Ltd. All rights reserved.
About the journal
JournalData powered by TypesetComputers and Structures
PublisherData powered by TypesetElsevier Ltd
ISSN00457949
Open AccessNo
Concepts (25)
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    Cantilever beams
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    Carbon
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    Carbon fibers
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    Computation theory
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    Cost functions
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    Crack propagation
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    Cracks
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    Energy release rate
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    Failure (mechanical)
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    Finite element method
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    Identification (control systems)
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    Inverse problems
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    Mechanical properties
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    Mechanical testing
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    Strain energy
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    Strain rate
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    CARBON/EPOXY COMPOSITES
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    Computational modelling
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    CRITICAL STRAIN ENERGY RELEASE RATES
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    DOUBLE CANTILEVER BEAM
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    EXTENDED FINITE ELEMENT METHOD
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    IDENTIFICATION OF MODES
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    Independent parameters
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    Numerical methodologies
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    Parameter estimation