OPTIMIZATION AND IDENTIFICATION OF A BIAXIAL TENSILE TEST BASED UPON SENSITIVITY TO MATERIAL PARAMETERS

Abstract : The objective of the present study is to propose a protocol and a criterion to guide the design of specimen shape but also loading history to lower the sensitivity of the identified parameters to the measurement uncertainties. The identification quality of constitutive parameters is both related to the experimental procedures and the identification methods. In the measurement work, the identification quality is estimated by the covariance matrix of the identified material parameters [1, 2]. It accounts for different aspects of the problem, namely, the geometry of the studied structure, the chosen constitutive law, the set of parameters, the boundary conditions, the measurement uncertainties, the identification method and to a lesser extent the numerical simulation method. It is written relatively to the two identification techniques followed herein (i.e., Finite Element Updating Method (FEMU) and Integrated Digital Image Correlation (I-DIC) [3]). The first one consists of computing the set of constitutive parameters that minimize the displacement error χ
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Morgan Bertin, François Hild, Stéphane Roux, Florent Mathieu, Hugo Leclerc. OPTIMIZATION AND IDENTIFICATION OF A BIAXIAL TENSILE TEST BASED UPON SENSITIVITY TO MATERIAL PARAMETERS. European Solid Mechanics Conference, Jul 2015, Madrid, Spain. ⟨hal-01168070⟩

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