Identification of Local Elastic Parameters in Heterogeneous Materials Using a Parallelized Femu Method
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Photomechanics & Experimental Mechanics (PEM) team, Dept. Génie Mécanique et Systèmes Complexes (GMSC), Institut P’ UPR 3346 CNRS - , Université de Poitiers – ENSMA, SP2MI – Téléport 2, 11 Boulevard Marie et Pierre Curie, BP 30179, F86962 Futuroscope Chasseneuil Cedex, France
Online publication date: 2019-12-04
Publication date: 2019-12-01
International Journal of Applied Mechanics and Engineering 2019;24(4):140-156
In this work, we explore the possibilities of the widespread Finite Element Model Updating method (FEMU) in order to identify the local elastic mechanical properties in heterogeneous materials. The objective function is defined as a quadratic error of the discrepancy between measured fields and simulated ones. We compare two different formulations of the function, one based on the displacement fields and one based on the strain fields. We use a genetic algorithm in order to minimize these functions. We prove that the strain functional associated with the genetic algorithm is the best combination. We then improve the implementation of the method by parallelizing the algorithm in order to reduce the computation cost. We validate the approach with simulated cases in 2D.
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