Identification method for the mixed mode interlaminar behavior of a composite thermoset using displacement field measurements and load data

Abstract : To analyze the delamination behavior of a thermoset composite, the parameters of a mixed mode cohesive model are identified by combining experimental displacement fields measured via global digital image correlation and load data in a single cost function written within a Bayesian framework using Finite Element Model Updating. A sensitivity analysis shows that the load data are of prime importance to enable the sought parameters to be tuned. Two delamination tests are analyzed in a single procedure that is first decoupled to find good initial guesses, and then fully coupled to get a set that is compatible with both experiments. The sensitivity of the calibrated parameters to their initial guess is analyzed. A low model error is found thereby validating the proposed approach (enabling to choose the best strategy for identification steps).
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Submitted on : Tuesday, October 25, 2016 - 10:29:45 PM
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Jean-Sébastien Affagard, Florent Mathieu, Jean-Mathieu Guimard, François Hild. Identification method for the mixed mode interlaminar behavior of a composite thermoset using displacement field measurements and load data. Composites Part A: Applied Science and Manufacturing, Elsevier, 2016, 91, pp.238 - 249. ⟨10.1016/j.compositesa.2016.10.007⟩. ⟨hal-01387657⟩

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