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Title: Behaviour model identification based on inverse modeling and using Optical Full Field Measurements (OFFM): application on rubber and steel

Abstract

Biaxial properties of materials (polymer or steel) used in many industrial processes are often difficult to measure. However, these properties are useful for the numerical simulations of plastic-processing operations like blow moulding or thermoforming for polymers and superplastic forming or single point incremental forming for steels. Today, Optical Full Field Measurements (OFFM) are promising tools for experimental analysis of materials. Indeed, they are able to provide a very large amount of data (displacement or strain) spatially distributed. In this paper, a mixed numerical and experimental investigation is proposed in order to identify multi-axial constitutive behaviour models. The procedure is applied on two different materials commonly used in forming processes: polymer (rubber in this first approach) and steel. Experimental tests are performed on various rubber and steel structural specimens (notched and open-hole plate samples) in order to generate heterogeneous displacement field. Two different behaviour models are considered. On the one hand, a Money-Rivlin hyperelastic law is investigated to describe the high levels of strain induced in tensile test performed on a rubber open-hole specimen. On the other hand, Ramberg-Osgood law allows to reproduce elasto-plastic behaviour of steel on a specimen that induces heterogeneous strain fields. Each parameter identification is based onmore » a same Finite Element Model Updated (FEMU) procedure which consists in comparing results provided by the numerical simulation (ABAQUS) with full field measurements obtained by the DISC (Digital Image Stereo-Correlation) technique (Vic-3D)« less

Authors:
; ; ; ;  [1]
  1. Research Centre on Tools Materials and Processes (CROMeP), Ecole des mines d'Albi-Carmaux, 81013 ALBI Cedex 9 (France)
Publication Date:
OSTI Identifier:
21057030
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 907; Journal Issue: 1; Conference: 10. ESAFORM conference on material forming, Zaragoza (Spain), 18-20 Apr 2007; Other Information: DOI: 10.1063/1.2729484; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; A CODES; COMPUTERIZED SIMULATION; CORRELATIONS; ELASTICITY; FINITE ELEMENT METHOD; IMAGE PROCESSING; IMAGES; MATERIALS TESTING; MOLDING; PLASTICITY; PLATES; RUBBERS; STEELS; STRAINS

Citation Formats

Velay, V., Robert, L., Schmidt, F., Hmida, S., and Vallet, T. Behaviour model identification based on inverse modeling and using Optical Full Field Measurements (OFFM): application on rubber and steel. United States: N. p., 2007. Web. doi:10.1063/1.2729484.
Velay, V., Robert, L., Schmidt, F., Hmida, S., & Vallet, T. Behaviour model identification based on inverse modeling and using Optical Full Field Measurements (OFFM): application on rubber and steel. United States. doi:10.1063/1.2729484.
Velay, V., Robert, L., Schmidt, F., Hmida, S., and Vallet, T. Sat . "Behaviour model identification based on inverse modeling and using Optical Full Field Measurements (OFFM): application on rubber and steel". United States. doi:10.1063/1.2729484.
@article{osti_21057030,
title = {Behaviour model identification based on inverse modeling and using Optical Full Field Measurements (OFFM): application on rubber and steel},
author = {Velay, V. and Robert, L. and Schmidt, F. and Hmida, S. and Vallet, T.},
abstractNote = {Biaxial properties of materials (polymer or steel) used in many industrial processes are often difficult to measure. However, these properties are useful for the numerical simulations of plastic-processing operations like blow moulding or thermoforming for polymers and superplastic forming or single point incremental forming for steels. Today, Optical Full Field Measurements (OFFM) are promising tools for experimental analysis of materials. Indeed, they are able to provide a very large amount of data (displacement or strain) spatially distributed. In this paper, a mixed numerical and experimental investigation is proposed in order to identify multi-axial constitutive behaviour models. The procedure is applied on two different materials commonly used in forming processes: polymer (rubber in this first approach) and steel. Experimental tests are performed on various rubber and steel structural specimens (notched and open-hole plate samples) in order to generate heterogeneous displacement field. Two different behaviour models are considered. On the one hand, a Money-Rivlin hyperelastic law is investigated to describe the high levels of strain induced in tensile test performed on a rubber open-hole specimen. On the other hand, Ramberg-Osgood law allows to reproduce elasto-plastic behaviour of steel on a specimen that induces heterogeneous strain fields. Each parameter identification is based on a same Finite Element Model Updated (FEMU) procedure which consists in comparing results provided by the numerical simulation (ABAQUS) with full field measurements obtained by the DISC (Digital Image Stereo-Correlation) technique (Vic-3D)},
doi = {10.1063/1.2729484},
journal = {AIP Conference Proceedings},
number = 1,
volume = 907,
place = {United States},
year = {Sat Apr 07 00:00:00 EDT 2007},
month = {Sat Apr 07 00:00:00 EDT 2007}
}