Modeling and Investigation of Elongation in Free Explosive Forming of Aluminum Alloy Plate

Because of high ductility, aluminum alloys, have been widely used as an important base of metal forming industries. But the main week point of these alloys is their low strength so in forming them with conventional methods like deep drawing, hydro forming, etc have been always faced with problems like fracture during of forming process. Because of this, recently using of explosive forming method for forming of these plates has been recommended. In this paper free explosive forming of A2024 aluminum alloy is numerically simulated and during it, explosion wave propagation process is studied. Consequences of this simulation can be effective in prediction of quality of production. These consequences are compared with an experimental test and show the superiority of this method to similar methods like hydro forming and deep drawing.

• R. Alipour
• F.Najarian

• Free explosive forming
• CEL
• Johnson cook.

[1] D.J. Mynors, B. Zhang, "Applications and Capabilities of Explosive
Forming", Materials Processing Technology J., vol. 125-126, pp.1-25,
2002.
[2] E. Paul Degarmo and others, "materials and processes of
manufacturing", 3rd ed. McGraw-Hill, pp. 123-138, 2003.
[3] A. A. Akbari Mousavi, G. Joodaki, "Explosive Welding Simulation of
Multilayer Tubes", VIII conference of computational plasticity, 2005,
Barcelona, Spain.
[4] V.N. Wijayathunga, D.C. Webb, "Experimental evaluation and finite
element simulation of explosive forming of a square cup from a brass
plate assisted by a lead plug", Materials Processing Technology J.,
vol.172, pp.139-145, 2006.
[5] R. Alipour, D. Javabvar and A. Alavinia, "Numerical Simulation of
Explosive Forming of Spherical Shells By Charge Geometry
Variations", ISME Conf, 2008, Shahid Bahonar University, Kerman,
Iran.
[6] R. Alipour, "Simulation of explosive forming", M.sc Thesis in
Mechanical Engineering, Islamic Azad university of Dezful, Iran, 2008,
pp.56-86.
[7] D. Javabvar, A. Alavinia, R. Alipour, "Investigation & Proffering a
Suitable Numerical Method to Simulation of Non-Die Explosive
Forming Problems", energetic materials J., vol. 6, pp. 11-20, 2008.
[8] LSTC. Ls_Dyna, "Non-Linear Dynamic Analysis of Structures in Three
Dimensions", Version 971, Theoretical Manual, Live More Software
Technology Corporation, 2004.
[9] G. H. Liaghat, "Production of Multi Layer Tube (Stainless Steel and
Carbon Steel) by Explosive Welding", Energetic Materials J., Vol. 2,
pp. 1 - 11, 2002.
[10] Z. Liang, "Numerical Analysis of Tensile Damage and Blast Crater in
Brittle Rock Due to Under Ground Explosion", Mechanics and Mining
Science J., vol. 44, pp 730-738, 2007.
[11] M. Queen, "The Equation of States of Solid from Shock Wave Studies",
7nd ed., New York: McGraw-Hill, 1970, pp. 242-251.
[12] S.A.A. Akbari Mousavi , M. Riahi and A. Hagh Parast, "Experimental
and numerical analyses of explosive free forming", Materials
Processing Technology J., vol.187-188, pp 512-516, 2007.