Elasto-plastic material parameter identification by inverse methods: Sensitivity matrix calculation

Steven Cooreman; Chantal Bouffioux; David Lecompte; Dimitri Debruyne; Hugo Sol; John Vantomme

Elasto-plastic material parameter identification by inverse methods: Sensitivity matrix calculation

Steven Cooreman, Chantal Bouffioux, David Lecompte, Dimitri Debruyne, Hugo Sol, John Vantomme

Structuren en Effecten van Explosies

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Samenvatting

Inverse methods offer a powerful tool for the determination of the elasto-plastic material properties. Contrary to standard tests, these methods can deal with heterogeneous stress and strain-fields which have a larger information contents and hence allow the simultaneous identification of several material parameters. Moreover, it is expected that the obtained material parameters are more accurate, since these heterogeneous deformation fields are much closer to those occurring in real (metal) forming operations. The principle of the inverse method for the identification of material parameters presented in this paper is to compare an experimentally measured strain field to that computed by a Finite Element (FE) model. The material parameters in the FE model are iteratively tuned in such a way that both strain fields match each other as close as possible. One of the building blocks in this identification procedure is the updating algorithm for the material parameters in the FE model. The key problem of this updating algorithm is the determination of the sensitivity matrix, which expresses the sensitivities of the strains with respect to the material parameters. This paper presents an analytical method for the calculation of this sensitivity matrix in case of simple tensile tests.

Originele taal-2	Engels
Titel	Proceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006
Pagina's	987-1000
Aantal pagina's	14
Status	Gepubliceerd - 2006
Evenement	SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006 - Saint Louis, MO, Verenigde Staten van Amerika Duur: 4 jun. 2006 → 7 jun. 2006

Publicatie series

Naam	Proceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006
Volume	2

Congres

Congres	SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006
Land/Regio	Verenigde Staten van Amerika
Stad	Saint Louis, MO
Periode	4/06/06 → 7/06/06

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Cooreman, S., Bouffioux, C., Lecompte, D., Debruyne, D., Sol, H., & Vantomme, J. (2006). Elasto-plastic material parameter identification by inverse methods: Sensitivity matrix calculation. In Proceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006 (blz. 987-1000). (Proceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006; Vol. 2).

Cooreman, Steven ; Bouffioux, Chantal ; Lecompte, David et al. / Elasto-plastic material parameter identification by inverse methods : Sensitivity matrix calculation. Proceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006. 2006. blz. 987-1000 (Proceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006).

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title = "Elasto-plastic material parameter identification by inverse methods: Sensitivity matrix calculation",

abstract = "Inverse methods offer a powerful tool for the determination of the elasto-plastic material properties. Contrary to standard tests, these methods can deal with heterogeneous stress and strain-fields which have a larger information contents and hence allow the simultaneous identification of several material parameters. Moreover, it is expected that the obtained material parameters are more accurate, since these heterogeneous deformation fields are much closer to those occurring in real (metal) forming operations. The principle of the inverse method for the identification of material parameters presented in this paper is to compare an experimentally measured strain field to that computed by a Finite Element (FE) model. The material parameters in the FE model are iteratively tuned in such a way that both strain fields match each other as close as possible. One of the building blocks in this identification procedure is the updating algorithm for the material parameters in the FE model. The key problem of this updating algorithm is the determination of the sensitivity matrix, which expresses the sensitivities of the strains with respect to the material parameters. This paper presents an analytical method for the calculation of this sensitivity matrix in case of simple tensile tests.",

keywords = "Elasto-plastic material properties, FEM, Heterogeneous fields, Inverse methods, Sensitivity matrix",

author = "Steven Cooreman and Chantal Bouffioux and David Lecompte and Dimitri Debruyne and Hugo Sol and John Vantomme",

year = "2006",

language = "English",

isbn = "091205395X",

series = "Proceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006",

pages = "987--1000",

booktitle = "Proceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006",

note = "SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006 ; Conference date: 04-06-2006 Through 07-06-2006",

}

Cooreman, S, Bouffioux, C, Lecompte, D, Debruyne, D, Sol, H & Vantomme, J 2006, Elasto-plastic material parameter identification by inverse methods: Sensitivity matrix calculation. in Proceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006. Proceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006, vol. 2, blz. 987-1000, SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006, Saint Louis, MO, Verenigde Staten van Amerika, 4/06/06.

Elasto-plastic material parameter identification by inverse methods: Sensitivity matrix calculation. / Cooreman, Steven; Bouffioux, Chantal; Lecompte, David et al.
Proceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006. 2006. blz. 987-1000 (Proceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006; Vol. 2).

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/Congresprocedure › Conferentiebijdrage › peer review

TY - GEN

T1 - Elasto-plastic material parameter identification by inverse methods

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AU - Cooreman, Steven

AU - Bouffioux, Chantal

AU - Lecompte, David

AU - Debruyne, Dimitri

AU - Sol, Hugo

AU - Vantomme, John

PY - 2006

Y1 - 2006

N2 - Inverse methods offer a powerful tool for the determination of the elasto-plastic material properties. Contrary to standard tests, these methods can deal with heterogeneous stress and strain-fields which have a larger information contents and hence allow the simultaneous identification of several material parameters. Moreover, it is expected that the obtained material parameters are more accurate, since these heterogeneous deformation fields are much closer to those occurring in real (metal) forming operations. The principle of the inverse method for the identification of material parameters presented in this paper is to compare an experimentally measured strain field to that computed by a Finite Element (FE) model. The material parameters in the FE model are iteratively tuned in such a way that both strain fields match each other as close as possible. One of the building blocks in this identification procedure is the updating algorithm for the material parameters in the FE model. The key problem of this updating algorithm is the determination of the sensitivity matrix, which expresses the sensitivities of the strains with respect to the material parameters. This paper presents an analytical method for the calculation of this sensitivity matrix in case of simple tensile tests.

AB - Inverse methods offer a powerful tool for the determination of the elasto-plastic material properties. Contrary to standard tests, these methods can deal with heterogeneous stress and strain-fields which have a larger information contents and hence allow the simultaneous identification of several material parameters. Moreover, it is expected that the obtained material parameters are more accurate, since these heterogeneous deformation fields are much closer to those occurring in real (metal) forming operations. The principle of the inverse method for the identification of material parameters presented in this paper is to compare an experimentally measured strain field to that computed by a Finite Element (FE) model. The material parameters in the FE model are iteratively tuned in such a way that both strain fields match each other as close as possible. One of the building blocks in this identification procedure is the updating algorithm for the material parameters in the FE model. The key problem of this updating algorithm is the determination of the sensitivity matrix, which expresses the sensitivities of the strains with respect to the material parameters. This paper presents an analytical method for the calculation of this sensitivity matrix in case of simple tensile tests.

KW - Elasto-plastic material properties

KW - FEM

KW - Heterogeneous fields

KW - Inverse methods

KW - Sensitivity matrix

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T3 - Proceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006

SP - 987

EP - 1000

BT - Proceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006

Y2 - 4 June 2006 through 7 June 2006

ER -

Cooreman S, Bouffioux C, Lecompte D, Debruyne D, Sol H, Vantomme J. Elasto-plastic material parameter identification by inverse methods: Sensitivity matrix calculation. In Proceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006. 2006. blz. 987-1000. (Proceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006).

Elasto-plastic material parameter identification by inverse methods: Sensitivity matrix calculation

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