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Gas Detonation Forming by a Mixture of H2+O2 Detonation

Authors: Morteza Khaleghi Meybodi, Hossein Bisadi

Abstract:

Explosive forming is one of the unconventional techniques in which, most commonly, the water is used as the pressure transmission medium. One of the newest methods in explosive forming is gas detonation forming which uses a normal shock wave derived of gas detonation, to form sheet metals. For this purpose a detonation is developed from the reaction of H2+O2 mixture in a long cylindrical detonation tube. The detonation wave goes through the detonation tube and acts as a blast load on the steel blank and forms it. Experimental results are compared with a finite element model; and the comparison of the experimental and numerical results obtained from strain, thickness variation and deformed geometry is carried out. Numerical and experimental results showed approximately 75 – 90 % similarity in formability of desired shape. Also optimum percent of gas mixture obtained when we mix 68% H2 with 32% O2.

Keywords: Explosive forming, High strain rate, Gas detonation, Finite element analysis.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1334253

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References:


[1] Vovk VT (1999) Gasexplosion als ÔÇÿÔÇÿWerkzeug-- in der Fertigungstechnik.Habilitation, Magdeburg Univ., Magdeburg.
[2] A. Honda, M. Suzuki, Sheet metal forming by using gas imploding detonation, J. Mater. Process. Technol. 85 (1999) 198-203.
[3] I. Fukuda, M. Ohmari, M. Fujita, The effect of shock pressure on the mechanical properties of some b.c.c. metals, J. Mater. Process. Technol. 85 (1999) 180-183.
[4] Meyers MA. Dynamic behaviour of materials. New York: John Wiley & Sons, Inc; 1996.
[5] Johnson GR, Cook WH. A constitutive model and data for metals subjected to large strains, high strain rates and high temperatures. In: Presented at the seventh international symposium on ballistics, The Hague, The Netherlands, April 1983.
[6] Johnson GR, Hoegfeldt JM, Lindholm US, Nagy A. ASME J Eng Mater Technol 1983; 105:42.
[7] I. Kadı, Detonasyon Olaylarının Bilgisayar Destekli Ölçme ve Analizi, Ph.D. Thesis, Marmara Üniversitesi Fen Bilimleri Enstitüsü, Istanbul, 1992.
[8] Yasar M. Yuksek H─▒zda Sekillendirilen Aluminyum Alas─▒mlar─▒nda Olusan Deformasyonun. Incelenmesi, PhD Thesis, Marmara Universitesi Fen Bilimleri Enstitusu, Istanbul, 2001.
[9] Sheet metal forming by gas detonation forming; A.A.Pashaei, A.Darvizeh , M.Sc. Thesis, The University of Guilan, Rasht, Iran.