HAL Id: hal-01324423
https://hal-upec-upem.archives-ouvertes.fr/hal-01324423
Submitted on 1 Jun 2016
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Putting Mechanical Content in DVC: Toward 4D Mechanical Correlation
François Hild, Amine Bouterf, Ludovic Chamoin, Hugo Leclerc, Florent Mathieu, Jan Neggers, Florent Pled, Zvonimir Tomičević, Stéphane Roux
To cite this version:
François Hild, Amine Bouterf, Ludovic Chamoin, Hugo Leclerc, Florent Mathieu, et al.. Putting Mechanical Content in DVC: Toward 4D Mechanical Correlation. Worshop New Challenges in Com- putational Mechanics 2016 (NCCM 2016). 2016. �hal-01324423�
Putting Mechanical Content in DVC:
Toward 4D Mechanical Correlation
F. Hild
1, A. Bouterf
1, L. Chamoin
1, H. Leclerc
1, F. Mathieu
1, J. Neggers
1, F. Pled
2, Z. Tomiˇcevi´c
1,3, S. Roux
11LMT,ENSCachan/CNRS/UniversitéParis-Saclay 61avenueduPrésidentWilson,Cachan,France
Email:[email protected]
2UniversitéParis-Est,LaboratoireModélisationetSimulationMultiEchelleMSME UMR8208CNRS,5boulevardDescartes,Marne-la-Vallée,France
Email:[email protected]
3DepartmentofEngineeringMechanics,FacultyofMechanicalEngineeringandNaval Architecture,UniversityofZagreb,Luˇci´ca5,Zagreb,Croatia
Email:[email protected]
Thegoalofthepresentstudyistoillustratethefullintegrationofsensorandimaging dataintonumericalproceduresforthepurposeofidentificationofconstitutivelawsand theirvalidation. Thefeasibilityofsuchapproachesisproveninthecontextofinsitu testsmonitoredbytomography. Thebridgingtoolconsistsofspatiotemporal(i.e.,4D) analyseswithdedicated(integrated)correlationalgorithms.
Atensiletestonnodulargraphitecastironsampleisperformedwithinalabtomo- graph.Thereconstructedvolumesareregisteredbyresortingtointegrateddigitalvolume correlation(DVC)thatincorporatesafiniteelementmodelingofthetest,therebyperform- ingamechanicalintegrationin4Dregistrationofaseriesof3Dimages.Inthepresent caseanon-intrusiveprocedureisdevelopedinwhichthe4Dsensitivityfieldsareobtained withacommercialfiniteelementcode,allowingforalargeversatilityinmeshingandin- corporationofcomplexconstitutivelaws. Convergencestudiescanthusbeperformed inwhichthequalityofthediscretizationiscontrolledbothforthesimulationandthe registration.
IncrementalDVCanalysesarecarriedoutwiththescansacquiredduringtheinsitu mechanicaltest.ForDVC,themeshsizeresultsfromacompromisebetweenmeasure- mentuncertaintiesanditsspatialresolution.Conversely,anumericallygoodmeshmay revealtoofinefortheconsideredmaterialmicrostructure.Withtheintegratedframework proposedherein,4Dregistrationscanbeperformedandmissingboundaryconditionsof thereferencestateaswellasmechanicalparametersofanelastoplasticconstitutivelaw aredeterminedinfairconditionbothforDVCandsimulation.
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