Experimental and numerical study on failure mechanisms of the 7.62$$\times $$ 25 mm FMJ projectile and hyperelastic target material during ballistic impact
Paweł Żochowski, Marcin Cegła, Krzysztof Szczurowski, J. Mączak, Marcin Bajkowski, Ewa Bednarczyk, Roman Grygoruk, Mariusz Magier, Dariusz Pyka, Mirosław Bocian, Krzysztof Jamroziak, Roman Gieleta, Piotr Prasuła
Abstract
Abstract The main aim of the work was the experimental and numerical analysis of the energy absorption/dissipation capabilities and failure mechanisms of novel hyper-elastic target material intended for ballistic applications including layers of composite armors, projectile catching systems and anti-ricochet layers covering walls of shooting ranges, ballistic tunnels, etc. Static and dynamic mechanical properties of the material were analyzed at both room and elevated temperatures ( $$40\div 80\,^{\circ }\hbox {C}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>40</mml:mn> <mml:mo>÷</mml:mo> <mml:mn>80</mml:mn> <mml:msup> <mml:mspace/> <mml:mo>∘</mml:mo> </mml:msup> <mml:mtext>C</mml:mtext> </mml:mrow> </mml:math> ). Numerical models of the material and $$7.62\times 25$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>7.62</mml:mn> <mml:mo>×</mml:mo> <mml:mn>25</mml:mn> </mml:mrow> </mml:math> mm FMJ projectile were defined. Simulations of the hyper-elastic target penetration with the projectile were carried out. The differences between the results obtained numerically and experimentally were determined (measured as a relative error) and were lower than 15% what testified about proper definition of the numerical models of the analyzed phenomenon components.