Fragmentation Behaviour of Radial Layered PELE Impacting Thin Metal Target Plates

Chun Cheng; Xi Chen; Zhonghua Du; Jilong Han; Chengxin Du; Lizhi Xu

doi:10.14429/dsj.68.12652

Chun Cheng School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing - 210 094
Xi Chen School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing - 210 094
Zhonghua Du School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing - 210 094
Jilong Han School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing - 210 094
Chengxin Du School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing - 210 094
Lizhi Xu School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing - 210 094

DOI: https://doi.org/10.14429/dsj.68.12652

Keywords: Penetrator with lateral effect, Impact, Thin metal target plates, Fragmentation

Abstract

The fragmentation mechanism of the penetrator with lateral effect (PELE) after perforating a thin target plate has been summarised and analysed firstly. Then the fragmentation of radial layered PELE was analysed qualitatively and verified by experiment. In the experiment, the target plates were made of 45# steel and 2A12 aluminium respectively. Qualitative analysis and experimental results show that: for normal PELE without layered, after perforating the thin metal target plate, from the bottom to the head of the projectile, the number of fragments formed by the jacket gradually increases, and the mass of the fragment decreases correspondingly. Compared with the normal PELE without layered, the radial layered PELE is less likely to break into fragments, when impacting the thin metal target plate with the same material and thickness under the same impact velocity. However, from the mechanism of the PELE, when the resistance of the target plate is large enough, and the duration of pressure is long enough, the radial layered PELE also can break into fragments with transverse velocity component. The resistance of the target plate plays an important role in the fragmentation of radial layered PELE. The radial layered PELE produced massive fragments with transverse velocity component when impacting the 45# steel plate with
5 mm thickness under the impact velocity of 657.2 m/s.

Author Biographies

Chun Cheng, School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing - 210 094

Mr Chun Cheng is presently a PhD D candidate in Nanjing University of Science and Technology majoring in Armament Science and Technology. Currently, he is devoting himself to the research areas of new type of ammunition aiming at light protective armor, experiment and simulation of terminal trajectory, fragmentation of solid material.

Xi Chen, School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing - 210 094

Dr (Ms) Xi Chen obtained her PhD from the Nanjing University of Science and Technology in 2014. Since 2014, she has been an assistant professor of Nanjing University of Science and Technology. Her current research interests are damage and protection technology, impact dynamics and material mechanics properties.

Zhonghua Du, School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing - 210 094

Dr Zhonghua Du obtained his PhD (Ammunition Engineering) from the Nanjing University of Science and Technology in 2002. Currently, He is a professor at the Nanjing University of Science and Technology. He has wide experience in armor piercing projectile and protective structure. His main areas of research include terminal damage of projectile impacting on different target plates, such as metal plate, carbon fiber laminate panels, ceramic plate and concrete slab, development of high explosive anti-tank cartridge with high efficiency of damage, active protection system applied to infantry fighting vehicle and self-propelled artillery.

Jilong Han, School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing - 210 094

Mr Jilong Han is presently a PhD D candidate in Nanjing University of Science and Technology majoring in Armament Science and Technology. His current research interests are mechanical properties of amorphous material, experiment and simulation of high explosive anti-tank cartridge.

Chengxin Du, School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing - 210 094

Mr Chengxin Du is presently a PhD D candidate in Nanjing University of Science and Technology majoring in Armament Science and Technology. He has designed and developed some new types armor piercing projectile based using tungsten alloy or Zirconium based amorphous composites.

Lizhi Xu, School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing - 210 094

Mr Lizhi Xu is presently a PhD D candidate in Nanjing University of Science and Technology majoring in Armament Science and Technology. He mainly studies the dynamic mechanical properties of polymer materials, the compression expansion properties of polymer materials and the impact compression properties of materials.

Fragmentation Behaviour of Radial Layered PELE Impacting Thin Metal Target Plates

Abstract

Author Biographies

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