Identification of elastic/visco-plastic material constants under impact loading
(2003) IUTAM Symposium on Field Analyses for Determination of Material Parameters - Experimental and Numerical Aspects In Solid Mechanics and its Applications 109. p.63-80- Abstract
- A numerical simulation is performed to identify the material parameters of an elastic/visco-plastic material under tensile impact loading. The identification is based on an inverse analysis using the Kaiman filter technique and the finite element method. The input data to the inverse analysis are the time histories of the strains on specimens. The measurement errors can be treated reasonably by the Kaiman filter technique, and the finite element method enables us to employ arbitrarily shaped specimens. Notched specimens are employed to obtain high strain rates at the notch root. It is found that an additional test under a relatively low strain rate is needed together with a test under a high strain rate to increase the accuracy of... (More)
- A numerical simulation is performed to identify the material parameters of an elastic/visco-plastic material under tensile impact loading. The identification is based on an inverse analysis using the Kaiman filter technique and the finite element method. The input data to the inverse analysis are the time histories of the strains on specimens. The measurement errors can be treated reasonably by the Kaiman filter technique, and the finite element method enables us to employ arbitrarily shaped specimens. Notched specimens are employed to obtain high strain rates at the notch root. It is found that an additional test under a relatively low strain rate is needed together with a test under a high strain rate to increase the accuracy of identification. The optimum strain rate in the additional test is determined by minimizing the largest eigen value of the covariance matrix of the estimated parameters. (Less)
- Abstract (Swedish)
- A numerical simulation is performed to identify the material parameters of an elastic/visco-plastic material under tensile impact loading. The identification is based on an inverse analysis using the Kalman filter technique and the finite element method. The input data to the inverse analysis are the time histories of the strains on specimens. The measurement errors can be treated reasonably by the Kalman filter technique, and the finite element method enables us to employ arbitrarily shaped specimens. Notched specimens are employed to obtain high strain rates at the notch root. It is found that an additional test under a relatively low strain rate is needed together with a test under a high strain rate to increase the accuracy of... (More)
- A numerical simulation is performed to identify the material parameters of an elastic/visco-plastic material under tensile impact loading. The identification is based on an inverse analysis using the Kalman filter technique and the finite element method. The input data to the inverse analysis are the time histories of the strains on specimens. The measurement errors can be treated reasonably by the Kalman filter technique, and the finite element method enables us to employ arbitrarily shaped specimens. Notched specimens are employed to obtain high strain rates at the notch root. It is found that an additional test under a relatively low strain rate is needed together with a test under a high strain rate to increase the accuracy of identification. The optimum strain rate in the additional test is determined by minimizing the largest eigen value of the covariance matrix of the estimated parameters. (Less)
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https://lup.lub.lu.se/record/0b2f495a-15c4-4123-a4df-dc0131a3c95f
- author
- Aoki, S. ; Amaya, K. ; Noguchi, T. ; Ståhle, P. LU and Sundin, K.G.
- publishing date
- 2003
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- IUTAM Symposium on Field Analyses For Determination of Materials Parameters - Experimental and Numerical Aspects
- series title
- Solid Mechanics and its Applications
- editor
- Ståhle, P. and Sundin, K. G.
- volume
- 109
- pages
- 18 pages
- publisher
- Springer
- conference name
- IUTAM Symposium on Field Analyses for Determination of Material Parameters - Experimental and Numerical Aspects
- conference location
- Kiruna, Sweden
- conference dates
- 2000-07-31 - 2000-08-04
- external identifiers
-
- wos:000183488300008
- ISSN
- 0925-0042
- ISBN
- 1-4020-1283-7
- DOI
- 10.1007/978-94-010-0109-0_8
- language
- English
- LU publication?
- no
- additional info
- Aoki, S Amaya, K Noguchi, T Stahle, P Sundin, KG IUTAM Symposium on Field Analyses for Determination of Material Parameters - Experimental and Numerical Aspects Jul 31-aug 04, 2000 Kiruna, sweden Int Union Theoret & Appl Mech, Volvo Aero Corp Sweden, Knowledge Fdn Stahle, Per/J-3590-2014 0925-0042
- id
- 0b2f495a-15c4-4123-a4df-dc0131a3c95f
- date added to LUP
- 2019-06-25 18:46:11
- date last changed
- 2020-01-29 15:16:44
@inproceedings{0b2f495a-15c4-4123-a4df-dc0131a3c95f,
abstract = {{A numerical simulation is performed to identify the material parameters of an elastic/visco-plastic material under tensile impact loading. The identification is based on an inverse analysis using the Kaiman filter technique and the finite element method. The input data to the inverse analysis are the time histories of the strains on specimens. The measurement errors can be treated reasonably by the Kaiman filter technique, and the finite element method enables us to employ arbitrarily shaped specimens. Notched specimens are employed to obtain high strain rates at the notch root. It is found that an additional test under a relatively low strain rate is needed together with a test under a high strain rate to increase the accuracy of identification. The optimum strain rate in the additional test is determined by minimizing the largest eigen value of the covariance matrix of the estimated parameters.}},
author = {{Aoki, S. and Amaya, K. and Noguchi, T. and Ståhle, P. and Sundin, K.G.}},
booktitle = {{IUTAM Symposium on Field Analyses For Determination of Materials Parameters - Experimental and Numerical Aspects}},
editor = {{Ståhle, P. and Sundin, K. G.}},
isbn = {{1-4020-1283-7}},
issn = {{0925-0042}},
language = {{eng}},
pages = {{63--80}},
publisher = {{Springer}},
series = {{Solid Mechanics and its Applications}},
title = {{Identification of elastic/visco-plastic material constants under impact loading}},
url = {{http://dx.doi.org/10.1007/978-94-010-0109-0_8}},
doi = {{10.1007/978-94-010-0109-0_8}},
volume = {{109}},
year = {{2003}},
}