Numerical Simulation on Effect of Impact Velocity and Target Thickness in Magnesium Alloy AZ31B

Abstract:

Recent research works indicate that magnesium alloy can be used for constructing light weight armor because of its density, which is 35% lower than aluminium and 77% lower than steel and also it exhibits superior vibration damping and better failure mechanisms than the contemporary ballistic materials. In this study, numerical simulations were carried out in a monolithic magnesium AZ31B plate using AUTODYN software to understand the effect of Impact velocity and plate thickness on the deformation of target plates. The projectiles are normally impacted on target plates of varying thickness plates at different velocities. Lagrangian solver was used for meshing, in which the grid developed by the solver distorts with the material helps in eliminating the inaccuracies caused by the cell growth due to the shear force of the bullet impact. The simulation results are verified with the experimental data available in the literature.

• Periodical: Applied Mechanics and Materials (Volume 787)
• Pages: 291-295
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.787.291
• Online since: August 2015
• Authors: B. Ezhil Vendhan*, K. L. Harikrishna, A.K. Lakshminarayanan
• Keywords: AZ31B Magnesium Alloy, Ballistic Resistance, Numerical Simulation

References

[1] Zvi Rosenberg., Erez Dekel, Terminal ballistics, Springer, (2012).

[2] Flake C. Campbell, Elements of metallurgy and engineering alloys, (2008).

[3] E.A. Flores-Johnson., M. Saleh., L. Edwards, Ballistic performance of multi-layered metallic plates impacted by a 7. 62-mm APM2 projectile, Internationa Journal of Impact Engineering 38 (2011) 1022-1032.

DOI: 10.1016/j.ijimpeng.2011.08.005

[4] Tyrone L. Jones., and Richard D. DeLorme, Development of a Ballistic Specification for Magnesium Alloy AZ31B, Army research laboratory ARL-TR-4664 December (2008).

DOI: 10.21236/ada494926

[5] Dan Hasenpouth, Tensile high strain rate behavior of AZ31B magnesium alloy sheet, A thesis presented to the University of Waterloo Waterloo, Ontario, Canada, (2010).

[6] Zukas J. A, Impact Dynamics, John Wiley & Sons Inc., NY, (1990).

[7] V. Narayanamurthy., C. Lakshmana Rao., B.N. Rao Numerical, Simulation of Ballistic Impact on Armour Plate with a Simple Plasticity Model, Defence Science Journal, 64(1) (2014).

DOI: 10.14429/dsj.64.4521

[8] N.K. Gupta., M.A. Iqbal., G.S. Sekhon, Effect of projectile nose shape, impact velocity and target thickness on deformation behavior of aluminum plates, International Journal of Solids and Structures 44 (2007) 3411–3439.

DOI: 10.1016/j.ijsolstr.2006.09.034

[9] AUTODYN® Explicit Software for Nonlinear Dynamics, Theory Manual Revision 4. 3, Century Dynamics, (2005).