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Application of the Virtual Fields Method to determine dynamic properties at intermediate strain rates

Application of the Virtual Fields Method to determine dynamic properties at intermediate strain rates
Application of the Virtual Fields Method to determine dynamic properties at intermediate strain rates

Crash analysis simulation is now very important in automotive industry to assess automotive crashworthiness and safety. In order to acquire reliable crash simulation results, precise material behaviors at intermediate strain rates should be used as input data. To determine the stress-strain curves at various strain rates, the number of expensive and complicated experiments is large. The present study aims at determining the stress-strain curves of sheet metals at various strain rates from a single dynamic experiment. A new type of high speed tensile tester for sheet metal specimens was built and high speed tensile tests were carried out. Full-field heterogeneous strain fields were measured by a digital image correlation technique using a high-speed camera. The load data was acquired from strain gauges attached to the elastic deformation region on the specimen. Then, an inverse identification scheme with a rate dependent hardening law was applied to retrieve dynamic parameters. The stress-strain curves of advanced high strength steel at intermediate strain rates (100/s - 300/s) were successfully obtained from a single experiment.

1742-6588
Kim, J. H.
218ef786-b44c-435c-a659-45606094070d
Park, J. S.
905823a6-e5de-4a50-9965-4eb14d40a757
Barlat, F.
48bfc27a-f489-42b4-987c-76c6f84d0714
Pierron, F.
a1fb4a70-6f34-4625-bc23-fcb6996b79b4
Kim, J. H.
218ef786-b44c-435c-a659-45606094070d
Park, J. S.
905823a6-e5de-4a50-9965-4eb14d40a757
Barlat, F.
48bfc27a-f489-42b4-987c-76c6f84d0714
Pierron, F.
a1fb4a70-6f34-4625-bc23-fcb6996b79b4

Kim, J. H., Park, J. S., Barlat, F. and Pierron, F. (2018) Application of the Virtual Fields Method to determine dynamic properties at intermediate strain rates. Journal of Physics: Conference Series, 1063 (1), [12041]. (doi:10.1088/1742-6596/1063/1/012041).

Record type: Article

Abstract

Crash analysis simulation is now very important in automotive industry to assess automotive crashworthiness and safety. In order to acquire reliable crash simulation results, precise material behaviors at intermediate strain rates should be used as input data. To determine the stress-strain curves at various strain rates, the number of expensive and complicated experiments is large. The present study aims at determining the stress-strain curves of sheet metals at various strain rates from a single dynamic experiment. A new type of high speed tensile tester for sheet metal specimens was built and high speed tensile tests were carried out. Full-field heterogeneous strain fields were measured by a digital image correlation technique using a high-speed camera. The load data was acquired from strain gauges attached to the elastic deformation region on the specimen. Then, an inverse identification scheme with a rate dependent hardening law was applied to retrieve dynamic parameters. The stress-strain curves of advanced high strength steel at intermediate strain rates (100/s - 300/s) were successfully obtained from a single experiment.

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e-pub ahead of print date: 6 August 2018
Published date: 6 August 2018

Identifiers

Local EPrints ID: 424425
URI: http://eprints.soton.ac.uk/id/eprint/424425
ISSN: 1742-6588
PURE UUID: 25eb7dcb-73ad-4af8-90c0-4afe3cbd890d
ORCID for F. Pierron: ORCID iD orcid.org/0000-0003-2813-4994

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Date deposited: 05 Oct 2018 11:37
Last modified: 20 Jul 2019 00:47

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Contributors

Author: J. H. Kim
Author: J. S. Park
Author: F. Barlat
Author: F. Pierron ORCID iD

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