Dynamic fragmentation and failure of the hard core of a 12.7 mm API  projectile against SiC/6061T6Al composite armor  with various impact velocities

WANG Xiaodong; YU Yilei; JIANG Zhaoxiu; MA Minghui; GAO Guangfa

doi:10.11883/bzycj-2021-0181

Volume 42 Issue 2

Feb. 2022

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Article Navigation > Explosion And Shock Waves > 2022 > 42(2): 023303

WANG Xiaodong, YU Yilei, JIANG Zhaoxiu, MA Minghui, GAO Guangfa. Dynamic fragmentation and failure of the hard core of a 12.7 mm API projectile against SiC/6061T6Al composite armor with various impact velocities[J]. Explosion And Shock Waves, 2022, 42(2): 023303. doi: 10.11883/bzycj-2021-0181

Citation:

WANG Xiaodong, YU Yilei, JIANG Zhaoxiu, MA Minghui, GAO Guangfa. Dynamic fragmentation and failure of the hard core of a 12.7 mm API projectile against SiC/6061T6Al composite armor with various impact velocities[J]. Explosion And Shock Waves, 2022, 42(2): 023303. doi: 10.11883/bzycj-2021-0181

Citation:

WANG Xiaodong, YU Yilei, JIANG Zhaoxiu, MA Minghui, GAO Guangfa. Dynamic fragmentation and failure of the hard core of a 12.7 mm API projectile against SiC/6061T6Al composite armor with various impact velocities[J]. Explosion And Shock Waves, 2022, 42(2): 023303. doi: 10.11883/bzycj-2021-0181

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Dynamic fragmentation and failure of the hard core of a 12.7 mm API projectile against SiC/6061T6Al composite armor with various impact velocities

doi: 10.11883/bzycj-2021-0181

1.
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
2.
MOE Key Laboratory of Impact and Safety Engineering, Ningbo University, Ningbo 315211, Zhejiang, China

Received Date: 2021-05-12
Rev Recd Date: 2021-09-30

Available Online: 2022-01-24

Publish Date: 2022-02-28

Abstract

Abstract

The high hardness combined with its lower density makes silicon carbide (SiC) an attractive candidate for armor material. The main purpose of employing ceramics plate is to erode and fragment the impacting projectile, such as a 12.7 mm armor piercing incendiary (API) projectile with a very hard steel core. To explore the failure mechanism of the hard steel core, the ballistic impact experiments were carried out to study the dynamic responses of 12.7 mm API projectiles impacting ceramic/aluminium alloy composite armors. The SiC ceramics/6061T6 aluminium alloy composite targets with the composite cover on the front of the SiC were tested at speeds of 434.5, 503.1, 662.7, 704.6 and 844.6 m/s. The targets were entirely perforated by 12.7 mm API projectiles with the hard steel cores. The damages of projectiles, ceramic and back plates were analyzed phenomenologically. The damage modes of ceramic and steel backplates were identified. The resulting core fragments were collected and separated through a series of sized sieving screens, which allowing the core fragmentation to be quantified. The cumulative mass distribution curves of core after impact under various velocities were obtained. Microstructural and mechanical responses to the ballistic impacts were studied by using scanning electron microscope (SEM), showing that the core was broken into different particle sizes under the action of stress wave and impact. The cumulative mass of the steel core conforms to the Rosin–Rammler power function distribution. With the increase of impact velocity, both the power index k and the average characteristic size λ decreased. Average characteristic size λ can be used to characterize the fragmentation degree of the whole core to a certain extent. The failure mode of the larger equivalent diameter fragment (greater than 8 mm) in the process of impact was a tensile brittle fracture, while the local plastic shear fracture existed on the fragments with an equivalent diameter less than 2 mm.
- penetration,
- 12.7 mm armor piercing incendiary projectile,
- fragment,
- mass distribution,
- fracture mode

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References(18)

References

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