Fracture characteristics of YAG transparent ceramic composite targets subjected to impact of sphere fragments

BAO Kuo; ZHANG Xianfeng; WANG Guiji; DENG Jiajie; HAN Dan; TAN Mengting; WEI Haiyang

doi:10.11883/bzycj-2020-0339

Volume 41 Issue 3

Mar. 2021

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BAO Kuo, ZHANG Xianfeng, WANG Guiji, DENG Jiajie, HAN Dan, TAN Mengting, WEI Haiyang. Fracture characteristics of YAG transparent ceramic composite targets subjected to impact of sphere fragments[J]. Explosion And Shock Waves, 2021, 41(3): 031402. doi: 10.11883/bzycj-2020-0339

Citation:

BAO Kuo, ZHANG Xianfeng, WANG Guiji, DENG Jiajie, HAN Dan, TAN Mengting, WEI Haiyang. Fracture characteristics of YAG transparent ceramic composite targets subjected to impact of sphere fragments[J]. Explosion And Shock Waves, 2021, 41(3): 031402. doi: 10.11883/bzycj-2020-0339

Citation:

BAO Kuo, ZHANG Xianfeng, WANG Guiji, DENG Jiajie, HAN Dan, TAN Mengting, WEI Haiyang. Fracture characteristics of YAG transparent ceramic composite targets subjected to impact of sphere fragments[J]. Explosion And Shock Waves, 2021, 41(3): 031402. doi: 10.11883/bzycj-2020-0339

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Fracture characteristics of YAG transparent ceramic composite targets subjected to impact of sphere fragments

doi: 10.11883/bzycj-2020-0339

1.
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
2.
Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China
3.
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

Received Date: 2020-09-22
Rev Recd Date: 2020-10-28

Available Online: 2021-03-05

Publish Date: 2021-03-10

Abstract

Abstract

YAG (yttrium aluminum garnet) transparent ceramic, with excellent light transmittance and impact resistance, is an excellent protective material for transparent parts of weapons and equipments. It has a good application prospect in military equipment, aerospace and other national defense fields. The loading responses of material under impact loading are essential for understanding the fracture mechanism and can provide a basis for the composite target design. In order to obtain the fracture characteristics of YAG transparent ceramic composite targets under impact loading, a 9-mm-caliber gas-driven launch platform was used to carry out experiments on the impact of tungsten carbide spherical fragments into YAG transparent ceramic composite targets in the velocity range from 20 m/s to 310 m/s. The typical radial and ring crack propagation velocities were calculated by the surface damage evolution process captured by high-speed photography. The relationship between the impact velocity and the damage characteristics of the recovered targets was analyzed by observing the damage characteristics of the YAG fragments under a macroscope and a microscope. The results show that the propagation velocities of both the radial and ring cracks in the YAG ceramic layer decrease linearly with the increase of time and the crack propagation velocities are almost unaffected by the impact velocities. The central crushing area of the ceramic layer increases with the increase of the impact velocity, and the significant damage area of the intermediate glass layer is related to the area of the bottom ceramic cone. The correlation between ceramic cone angle and impact velocity is weak. Meanwhile, the crack crowns in the ceramic layer were found during the impact process. The relationship between the impact velocity of fragments and the number of crowns was obtained. The feature and the generating reason of the crack crowns were also analyzed. The fracture characteristics under a microscope were significantly affected by the crack orientation and stress wave action. The radial, ring and conical cracks produced more intergranular fracture with the increase of crack propagation distance, and more transgranular fracture with the increase of impact velocity.
- YAG transparent ceramic composite target,
- fragment impact,
- crack propagation velocity,
- intergranular fracture,
- transgranular fracture

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References(17)

References

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