{"title":"Efficient Oxyhydrogen Mixture Determination in Gas Detonation Forming","authors":"Morteza Khaleghi, Babak Seyed Aghazadeh, Hosein Bisadi","volume":80,"journal":"International Journal of Mechanical and Mechatronics Engineering","pagesStart":1748,"pagesEnd":1755,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/17152","abstract":"
Oxyhydrogen is a mixture of Hydrogen (H2<\/sub>) and Oxygen (O2<\/sub>) gases. Detonative mixtures of oxyhydrogens with various combinations of these two gases were used in Gas Detonation Forming (GDF) to form sheets of mild steel. In die forming experiments, three types of conical dies with apex angles of 60, 90 and 120 degrees were used. Pressure of mixtures inside the chamber before detonation was varied from 3 Bar to 5 Bar to investigate the effect of pre-detonation pressure in the forming process. On each conical die, several experiments with different percentages of Hydrogen were carried out to determine the optimum gaseous mixture. According to our results the best forming process occurred when approximately 50-70%. Hydrogen was employed in the mixture. Furthermore, the experimental results were compared to the ones from FEM analysis. The FEM simulation results of thickness strain, hoop strain, thickness variation and deformed geometry are promising.<\/p>\r\n","references":"[1] D.J. Mynors, B. Zhang, \u201cApplication and capabilities of explosive\r\nforming,\u201d J. Mater Process Technol., 125, pp. 1-25, 2002.\r\n[2] H.M. Wen, T.Y. Reddy, S.R. Reid, \u201cDeformation and failure of clamped\r\nbeams under low speed impact loading,\u201d Int. J. Impact Eng., 16, pp.\r\n435-454, 1995.\r\n[3] M. Khaleghi Meybodi, H. Bisadi, \u201cGas Detonation Forming by a\r\nMixture of H2 + O2 Detonation,\u201d World Academy of Science,\r\nEngineering and Technology, 33, pp. 55-58, 2009.\r\n[4] H. Bisadi, M. Khaleghi Meybodi, \u201cExperimental, numerical, and\r\ntheoretical analyses of simultaneous forming\u2013welding of\r\ninhomogeneous plates,\u201d ProcIMechE Part C: Journal of Mechanical\r\nEngineering Science, 225, pp. 2552-2564, 2011.\r\n[5] A. Honda, M. Suzuki, \u201cSheet metal forming by using gas imploding\r\ndetonation,\u201d J. Mater process Technol., 85, pp. 198-203, 1999.\r\n[6] V.J. Vohnout, \u201cA hybrid quasi-static\/dynamic process for forming large\r\nsheet metal parts from aluminum alloy,\u201d Ph.D. Dissertation, Ohio State\r\nUniversity, Columbus, Ohio, USA, 1998.\r\n[7] I. Fukuda, M. Ohmari, M. Fujita, \u201cThe effect of shock pressure on the\r\nmechanical properties of some b.c.c. metals,\u201dJ. Mater Process Technol.,\r\n85, pp. 180-183, 1999.\r\n[8] R.D. Cook, D.S. Malkus, M.E. Plesha, Concepts and applications of\r\nFinite Element Analysis.Wiley, New York, 1989.\r\n[9] G.R. Johnson, W.H. Cook, \u201cA constitutive model and data for metals\r\nsubjected large strains, high strain rates and high temperature,\u201d Proc. of\r\nthe 7th International Symposium on Ballistics, 541-547,1983.\r\n[10] W. Fickett, W.C. Davis, Detonation. University of California press,\r\n1979.\r\n[11] W.M. Beltman, J.E. Shepherd, \u201cLinear elastic response of tubes to\r\ninternal detonation loading,\u201dJ. Sound Vibration, 252, pp. 617-655, 2002.\r\n[12] M. Kleiner, M. Hermes, M. Weber, \u201cTube expansion by gas detonation,\u201d\r\nJ. Prod. Eng. Res. Devel.,1, pp. 9-17,2007.\r\n[13] W.F. Hosford, R.M. Caddell, Metal forming (Mechanics and\r\nmetallurgy). Prentice Hall, 1993.\r\n[14] M.Y.H. Bangash, Impact and explosion, analysis and design. Blackwell\r\nscientific publication, 1993, 212-214.\r\n[15] I. Kadi, \u201cDetonation Events Computer Aided Measurement and\r\nAnalysis,\u201d Ph.D. Thesis, Marmara University, Istanbul, Turkey, 1992.\r\n[16] M. Yasar, \u201cGas detonation forming process and modeling for efficient\r\nspring back prediction,\u201dJ. Mater Process Technol.,150, pp. 270-279,\r\n2004.","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 80, 2013"}