Tungsten long-rod penetration into confined cylinders of boron carbide at and above ordnance velocities |
| |
| Affiliation: | 1. PhD Scholar, Mechanical Engineering Department, BITS-Pilani, Hyderabad campus, Telangana 500078, India;2. Student, Mechanical Engineering Department, BITS-Pilani, Hyderabad campus, Telangana 500078, India;3. Assitant Professor, Mechanical Engineering Department, BITS-Pilani, Hyderabad campus, Telangana 500078, India;1. School of Mechanical & Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;2. School of Astronautics, Harbin Institute of Technology, Harbin 15000, People''s Republic of China;1. Universidade do Extremo Sul Catarinense (UNESC), Av. Universitária, 1105 - P.O. Box 3167, 88806-000 Criciúma, SC, Brazil;2. Instituto Militar de Engenharia (IME), Praça General Tibúrcio, 80 – Praia Vermelha, Urca, 22290-270 Rio de Janeiro, RJ, Brazil;1. Impact Physics RDRL-WMP-C, US Army Research Laboratory, Aberdeen Proving Ground, MD 21005-5066, USA;2. Adjunct Faculty, A. James Clark School of Engineering, University of Maryland, College Park, MD 20742, USA |
| |
| Abstract: | The purpose was to investigate the influence of impact velocity and confinement on the resistance of boron carbide targets to the penetration of tungsten long-rod projectiles. Experimental tests with impact velocities from 1400 to 2600 m/s were performed using a two-stage light-gas gun and a reverse impact technique. The targets consisted of boron carbide cylinders confined by steel tubes of various thicknesses. Simulations were carried out using the AUTODYN-2D code and Johnson–Holmquist's constitutive model with and without damage evolution. The experimental results show that the penetration process had different character in three different regions. At low-impact velocities, no significant penetration occurred. At high-impact velocities, the relation between penetration velocity and impact velocity was approximately linear, and the penetration was steady and symmetrical. In between, there was a narrow transition region of impact velocities with intermittent and strongly variable penetration velocity. In the lower part of this region, extended lateral flow of the projectile took place on the surface of the target. The influence of confinement on penetration velocity was found to be small, especially at high-impact velocities. The simulated results for penetration velocity versus impact velocity agreed fairly well with the experimental results provided damage evolution was suspended below the transition region. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
