Recent Enhancements to Determine Flow Stress Data in High Speed Compression Tests

Kopp, R.; Rehrmann, T.

Recent Enhancements to Determine Flow Stress Data in High Speed Compression Tests

dc.contributor.author	Kopp, R.	de
dc.contributor.author	Rehrmann, T.	de
dc.date.accessioned	2010-04-08T08:37:16Z
dc.date.available	2010-04-08T08:37:16Z
dc.date.issued	2004	de
dc.description.abstract	The accuracy in numerical simulation and physical models is increasing continually. For this reason, the attention to the measurement of flow stress fields at hot forming conditions rises presently. The determination of flow curves at small and middle strain rates up to 100/s has become a standard procedure. In the wide range between strain rates of 100/s up to 500/s no accurate experimental data of compression tests by the use of servo-hydraulic testing systems exists to date. In this context, the IBF investigated how compression tests especially on servo hydraulic testing-machines can be developed in order to expand the range of flow-curve fields clearly above 100/s with strains up to phi = 0.7. The maximum tool speed of the IBF testing machine is 3000 mm/s. This presentation shows the advances realised in this field. During the research activities, the existing servo-hydraulic high-speed testing machine has been optimised and new post processing techniques have been developed. Hence, valid flow stress values can now be determined up to strain rates of 300/s in compression tests on the utilised servo hydraulic testing system. Present investigations have the aim to determine absolutely reliably flow stress data even for strain rates up to 500 /s.	en
dc.identifier.uri	http://hdl.handle.net/2003/27049
dc.identifier.uri	http://dx.doi.org/10.17877/DE290R-12985
dc.language.iso	en	de
dc.publisher	Institut für Umformtechnik - Technische Universität Dortmund	de
dc.relation.ispartof	1st International Conference on High Speed Forming, March 31, April 1, 2004, Dortmund, Germany	de
dc.subject	flow stress	en
dc.subject	forming	en
dc.subject	measuring instrument	en
dc.subject	metal	en
dc.subject.ddc	620	de
dc.subject.ddc	670	de
dc.title	Recent Enhancements to Determine Flow Stress Data in High Speed Compression Tests	en
dc.type	Text	de
dc.type.publicationtype	conferenceObject	de
dcterms.accessRights	open access

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