Crater characteristics of carbon fiber/epoxy composite under hypervelocity impact in the velocity range from 3.0 km/s to 6.5 km/s

ZHOU Zhixuan; WANG Mafa; LI Junling; MA Zhaoxia

doi:10.11883/bzycj-2021-0251

Volume 42 Issue 8

Sep. 2022

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ZHANG Wenhao, YU Yonggang. Analysis of gas-eroding barrel characteristics based on fluid-solid interaction[J]. Explosion And Shock Waves, 2023, 43(3): 034201. doi: 10.11883/bzycj-2022-0390

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ZHOU Zhixuan, WANG Mafa, LI Junling, MA Zhaoxia. Crater characteristics of carbon fiber/epoxy composite under hypervelocity impact in the velocity range from 3.0 km/s to 6.5 km/s[J]. Explosion And Shock Waves, 2022, 42(8): 083301. doi: 10.11883/bzycj-2021-0251

ZHANG Wenhao, YU Yonggang. Analysis of gas-eroding barrel characteristics based on fluid-solid interaction[J]. Explosion And Shock Waves, 2023, 43(3): 034201. doi: 10.11883/bzycj-2022-0390

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Crater characteristics of carbon fiber/epoxy composite under hypervelocity impact in the velocity range from 3.0 km/s to 6.5 km/s

doi: 10.11883/bzycj-2021-0251

Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, Sichuan, China

Received Date: 2021-06-28
Rev Recd Date: 2022-03-14

Available Online: 2022-03-30

Publish Date: 2022-09-09

Abstract

Abstract

To study the crater’s characteristics of carbon fiber/epoxy composite targets at the impact velocity of 3.0－6.5 km/s, experiments of some composite targets impacted by spherical aluminum projectiles were carried out by applying a two-stage light gas gun in China Aerodynamics Research and Development Center. The targets were one kind of unidirectional braiding laminates made of carbon fiber and epoxy. The density of the targets was 1.5 g/cm³ and the size was 100 mm×100 mm×20 mm. The targets were clamped by two aluminum plates in experiments. One aluminum plate with the thickness of 2.5 mm was set 40 mm behind the targets to test fragments after the targets. The projectile diameter ranged from 1.00 mm to 3.05 mm. The damage feature of each target was obtained. A central crater surrounded with a shallow spalling region was observed in all recovered targets. Different from a semi-spherical crater, the central crater had a proximately quadrate edge, a semi-spherical bottom and a tough and rugged wall. The shallow spalling region was extremely irregular. The parameters of the crater and the shallow spalling region, such as the crater depth, the superficial area of the crater, the superficial area of the spalling region, were measured and analyzed. Moreover, the variations of the dimensionless crater depth p/d_p, the dimensionless equivalent crater diameter D_h/d_p and the equivalent diameter D_e of the spalling region with the impact velocity and energy were analyzed. Results show that the p/d_p depends on the density ratio ρ_p/ρ_t with a power of 1/2, and on the impact velocity v_i with a power of 2/3. The results are in good agreement with NASA’s hypervelocity experiments on reinforced carbon-carbon targets. The relationship of D_h/d_p with ρ_p/ρ_t and v_i is similar to that of p/d_p with ρ_p/ρ_t and v_i. D_e is a power function of impact kinetic energy. The crater-shape coefficient p/D_h is slightly greater than 0.5, which means the crater depth is larger than the crater radius.
- hypervelocity impact,
- crater characteristics,
- carbon fiber/epoxy composite,
- space debris

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References

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