Overview of Identification Methods of Mechanical Parameters Based on Full-field Measurements

Avril, Stéphane; Bonnet, Marc; Bretelle, Anne Sophie; Grédiac, Michel; Hild, François; Ienny, Patrick; Latourte, Félix; Lemosse, Didier; Pagano, Stéphane; Pagnacco, Emmanuel; Pierron, Fabrice

doi:10.1007/s11340-008-9148-y

Cited by 620 publications

(390 citation statements)

References 59 publications

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“…based on full-field measurements have been proposed in the past. It is beyond the scope of the present paper to recall the details of these methods, information can be found in the following review paper [14]. FEMU has been applied in the past to identify the constitutive parameters of materials from full-field measurements at high strain rates [15].…”

Section: Introductionmentioning

confidence: 99%

Exploration of Saint-Venant’s Principle in Inertial High Strain Rate Testing of Materials

Zhu

Pierron

2015

Exp Mech

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Current high strain rate testing procedures of materials are limited by poor instrumentation which leads to the requirement for stringent assumptions to enable data processing and constitutive model identification. This is the case for instance for the well known Split Hopkinson Pressure Bar (SHPB) apparatus which relies on strain gauge measurements away from the deforming sample. This paper is a step forward in the exploration of novel tests based on time and space resolved kinematic measurements obtained through ultra-high speed imaging. The underpinning idea is to use acceleration fields obtained from temporal differentiation of the full-field deformation maps measured through techniques like Digital Image Correlation (DIC) or the grid method. This information is then used for inverse identification with the Virtual fields Method. The feasibility of this new methodology has been verified in the recent past on a few examples. The present paper is a new contribution towards the advancement of this idea. Here, inertial impact tests are considered. They consist of firing a small steel ball impactor at rectangular free standing quasi-isotropic composite specimens. One of the main contributions of the work is to investigate the issue of through-thickness heterogeneity of the kinematic fields through both numerical simulations (3D finite element model) and actual tests. The results show that the parasitic effects arising from non-uniform through-the-thickness loading can successfully be mitigated by the use of longer specimens, making use of Saint-Venant's principle in dynamics.

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Section: Introductionmentioning

confidence: 99%

Exploration of Saint-Venant’s Principle in Inertial High Strain Rate Testing of Materials

Zhu

Pierron

2015

Exp Mech

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“…The objective that the computed forming results coincide with measured data from experiments leads to the inverse problem of parameter identification, which in general renders a nonlinear least-squares formulation. A couple of strategies exist to tackle this task, see Avril et al [13] for an overview. The approach we follow in this contribution is the Finite Element Model Updating (FEMU) strategy with respect to a minimization of the displacement differences, see [14].…”

Section: Parameter Identification Methodsmentioning

confidence: 99%

On gradient‐based optimization strategies for inverse problems in metal forming

Landkamer¹,

Söhngen²,

Steinmann³

et al. 2017

GAMM-Mitteilungen

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In the context of metal forming, optimization issues typically lead to inverse problems with a least-squares minimization as the objective. Due to the nonlinearities in forming simulations, iterative optimization approaches have to be considered. Gradient-based solution strategies for two inverse problems are proposed and compared to each other. Firstly, the identification of elasto-plastic material parameters is regarded. Secondly, a recently developed approach for the determination of an optimal workpiece design is investigated. As a special feature, both approaches can be coupled in a non-invasive fashion to arbitrary external finite element software via subroutines.

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“…In this case, an inverse solution tool becomes highly desirable. There have been various inverse solution tools suitable for parameter identification as reviewed by Avril et al (2008), for instance, finite element model updating (FEMU) (Farhat and Hemez, 1993;Güner et al, 2012;Roux and Bouchard, 2015;Zhang et al, 2014) and the virtual fields method (VFM) (Chalal et al, 2006;Grédiac and Pierron, 2006;Notta-Cuvier et al, 2013;Pierron and Grediac, 2012;Pierron et al, 2010b). These methods take advantage of the full-field deformation measurement techniques such as digital image correlation (DIC) (Sutton et al, 2009), the grid method (Grédiac et al, 2016), moiré and speckle interferometry (Creath, 1985;Post and Baracat, 1981), from which more comprehensive information of material behavior can be extracted from a greater number of measurement points on the specimen surface.…”

Section: Introductionmentioning

confidence: 99%

Identification of nonlinear kinematic hardening constitutive model parameters using the virtual fields method for advanced high strength steels

Barlat

Kim

et al. 2016

International Journal of Solids and Structures

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In this work, the nonlinear kinematic hardening combined with Voce isotropic hardening was selected to characterize the material behavior of advanced high strength steel sheet samples subjected to a few reverse loading cycles. Multi-components of backstress were considered for the combined nonlinear kinematical hardening model, namely, one, two, and three backstress components. To calibrate the model, an inverse problem solution tool, so-called virtual fields method, which takes full advantage of full-field deformation measurement, was applied to identify the material constitutive parameters. First, finite element simulations of forward-reverse simple shear were performed to validate the proposed identification method. The influence of strain noise on the identification accuracy was also evaluated. Then, the proposed method was applied to three kinds of sheet metals (DP600, TRIP780 and TWIP980) tested under two cycles of forward-reverse simple shear for parameter identification. The identification results obtained with different number of backstress components were critically discussed.

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Overview of Identification Methods of Mechanical Parameters Based on Full-field Measurements

Cited by 620 publications

References 59 publications

Exploration of Saint-Venant’s Principle in Inertial High Strain Rate Testing of Materials

Exploration of Saint-Venant’s Principle in Inertial High Strain Rate Testing of Materials

On gradient‐based optimization strategies for inverse problems in metal forming

Identification of nonlinear kinematic hardening constitutive model parameters using the virtual fields method for advanced high strength steels

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