A study of anti-penetration properties of continuous fiber-reinforced high-porosity composites<sup>1,2</sup>

WANG Yang; LI Guangbin; WANG Guiji; TANG Enling; GAO Guowen; PENG Hui

doi:10.11883/bzycj-2023-0472

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WANG Yang, LI Guangbin, WANG Guiji, TANG Enling, GAO Guowen, PENG Hui. A study of anti-penetration properties of continuous fiber-reinforced high-porosity composites1,2[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0472

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WANG Yang, LI Guangbin, WANG Guiji, TANG Enling, GAO Guowen, PENG Hui. A study of anti-penetration properties of continuous fiber-reinforced high-porosity composites^1,2[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0472

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A study of anti-penetration properties of continuous fiber-reinforced high-porosity composites^1,2

doi: 10.11883/bzycj-2023-0472

1.
Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China
2.
Key Laboratory of Transient Physical Mechanics and Energy Conversion Materials of Liaoning Province, Shenyang Ligong University, Shenyang 110159, Liaoning, China

Received Date: 2023-12-29
Rev Recd Date: 2024-04-16

Available Online: 2024-04-17

Abstract

Abstract

It is of great scientific significance and application value to study the anti-penetration performance of continuous fiber-reinforced high-porosity composites. First, the ballistic penetration experiments of 20 mm thick continuous fiber-reinforced high-porosity composites were carried out by using two-stage light gas gun firing Q235 steel projectiles of diameter 4.5 mm. Based on the analysis of the initial and final velocities of bullet penetration, the ballistic limit of the material is obtained. By observing the damage patterns of the target plate, these patterns are divided into three types from low to high according to the initial velocity of the projectiles: back-crack type, back-burst type and penetrated type. The anti-penetration performance of this composite material is compared with other materials by specific energy absorption, showing that the anti-penetration performance of the composite against low-speed penetration up to 600 m/s is better than those of steel, aluminum, Kevlar and glass fiber composite. Then, an orthogonal anisotropic continuum damage constitutive model is proposed for the continuous fiber-reinforced high-porosity composites. This constitutive model is written as a subroutine and embedded in the finite element software by secondary development. On this basis, the finite element simulations of ballistic penetrations of continuous fiber reinforced high-porosity composites are conducted. The validity of the constitutive and finite element models is verified by comparing the final velocity, ballistic limit and damage range of the back surface obtained from experiment and simulation. Furthermore, the damage mechanism of the penetration process is analyzed by observing the shape of the bullet hole, stress distribution and damage distribution obtained from the finite element simulation. The results show that the formation of the bullet hole during the penetration of spherical projectile is caused by shear damage, the debonding of fiber and matrix is caused by the combined action of compression and shear, the delamination damage of the target plate is caused by the tension wave created by the reflection of compression wave, and the fiber breakage belongs to tension damage. Besides, the kinetic energy, internal energy and their proportion to the kinetic energy change of the bullet are compared with the initial velocity. It is pointed out that most of the kinetic energy of the projectile is transformed into the kinetic energy of the fragment of target plates and the plastic deformation energy of the projectile. The research results provide a reference for the multifunctional integration of these composite materials in heat protection, penetration protection and load bearing.
- continuous fiber reinforced composite,
- ballistic limit,
- anti-penetration property,
- failure mechanism,
- energy transformation

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References(35)

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