Plastic wave propagation in Hopkinson bar - revisited

• Autorzy: Mićunović M. , Baltov A.
• Języki publikacji: EN

Abstrakty

EN

The subject of this paper is an analysis of the experimental Hopkinson bar technique when such a device consists of a short tensile or shearing specimen surrounded by two very long elastic bars [1]. Unlike the commonly applied by-pass analysis which attempts to draw conclusions from the behaviour of elastic bars, we attempt to take into account real plastic waves inside the specimen with several hundreds of reflections. A quasi rate-independent as well as a more general, rate-dependent tensor function model for AISI 316H calibrated in [19] are applied. Some special slightly perturbed elastic incident and reflected waves in elastic bars served to simulate the starting solutions. The numerical results have shown a good agreement with experimentally observed homogeneous strain state throughout the specimen during the process. Lindholm's procedure for finding specimen stress and strain by such a by-pass procedure is criticized.

Słowa kluczowe

EN

Hopkinson bar technique; plastic wave propagation; experimental analysis; numerical simulation; Lindholm's procedure

PL

propagacja fali plastycznej; analiza eksperymentalna; analiza numeryczna

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Archives of Mechanics
• Rocznik: 2002
• Tom: Vol. 54, nr 5-6
• Strony: 577--602
• Opis fizyczny: Bibliogr. 29 poz., rys.

Twórcy

autor

Mićunović M.

• Faculty of Mechanical Engineering, University of Kragujevac, Sestre Janjica 6a, 34000 Kragujevac, Yugoslavia

autor

Baltov A.

• Institute of Mechanics, Bulgarian Academy of Sciences bl. 4, Acad. G. Bontchev str., 1113 Sofia, Bulgaria

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