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Verification of the Exploitation Possibility of Tensile Strain during the Hopkinson´s Test

By Ivo Dohnal

Abstract

The PhD thesis deals with the possibility of performing dynamic tensile tests. For this purpose, Split Hopkinson Pressure Bar Test (hereinafter SHPBT) is used. The basic construction of SHPBT device is designed to perform dynamic compression tests on materials (metals, plastics, and ceramics). The obtained results are deformation stress – strain and strain rate – strain dependences. SHPBT is capable of testing materials at high strain rates up to 10^2 – 10^3 s-1. It was created a special device for dynamic tensile tests of materials at high strain rates. The created device uses the basic construction of SHPBT. The special device is used for testing flat specimens with 2 mm thickness. It was recognized by the Industrial Property Office of the Czech Republic as a utility model with number 23703. The specimens used for dynamic tensile testing were made of austenitic stainless steel (WNr. 1.4301) with 2 mm thickness. The verification of created device was carried out by numerical simulation. The numerical simulation was performed by ANSYS LS – Dyna software

Topics: korozivzdorná ocel 1.4301 (ČSN 41 7240); Split Hopkinson Pressure Bar Test (SHPBT) – Split Hopkinson Tensile Bar Test (SHTBT); metoda konečných prvků.; dynamic tensile test; ploché vzorky; Hopkinsonův kompresní test (SHPBT); stainless steel 1.4301 (ČSN 41 7240); flat specimens; finite element method.; dynamická tahová zkouška
Publisher: Vysoké učení technické v Brně. Fakulta strojního inženýrství
Year: 2014
OAI identifier: oai:invenio.nusl.cz:234205
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