Response Characteristics of UHMWPE-Metal Composite Armor Plates Subjected to Combined Blast-Fragment Impact
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摘要: 为研究超高分子量聚乙烯纤维(UHMWPE)增强复合材料/金属复合装甲板在爆炸与破片联合载荷作用下的损伤机制与防护性能，通过复合弹模拟爆炸与破片联合冲击的实验方法，系统分析了不同冲击速度下复合装甲板的典型失效模式.在此基础上，通过有限元方法对实验结果进行了验证，并进一步探究了面板结构布局对其动态响应的关键影响.研究结果表明：UHMWPE前置复合板中，钢板的刚性约束限制了纤维层大变形能力，但提升了应力扩散效应，使其表现出更优的抗爆性能；UHMWPE后置复合板中，UHMWPE层可充分释放黏弹性变形潜能，通过大变形耗散破片动能，具有更优的抗侵彻能力；两种构型防护效能的差异源于材料排布顺序引发的约束效应差异，该效应直接影响复合结构中的能量分配机制与失效模式演进Abstract: The damage mechanisms and ballistic performance of ultra-high molecular weight polyethylene (UHMWPE) fiber reinforced composite/metal armor plates were investigated under combined blast and fragment impact. The combined loading experiments were conducted with composite projectiles. The typical failure modes of the armor plates at varying impact velocities were systematically analyzed. On this basis, the finite element method was employed to validate the experimental results. Furthermore, the key influence of the panel structure layout on its dynamic response was further explored. The results demonstrate that, in the configuration with UHMWPE at the front, the rigid constraint imposed by the steel plate restricts the large deformation capacity of the fiber layers. However, it enhances the stress diffusion effect. Consequently, this configuration exhibits superior blast resistance. Conversely, in the configuration with UHMWPE at the back, the UHMWPE layer fully exerts its potential of viscoelastic deformation. It dissipates the fragment kinetic energy primarily through large deformation, resulting in better penetration resistance. The difference in protective efficacy between these 2 configurations originates from the distinct constraint effects from the material stacking sequence. This constraint effect directly governs the energy distribution mechanisms and the evolution of failure modes within the composite structure.
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Key words:
- ultra-high molecular weight polyethylene /
- composite armor /
- combined load
other(Recommended by Liu Shaobao, Member of the Editorial Board of AMM)
1) (本刊编委刘少宝推荐) -
图 2 实验原理示意图(单位: mm)
Figure 2. Schematic diagram of the experimental principle(unit: mm)
图 3 闭孔泡沫铝准静态压缩曲线
Figure 3. The quasi-static compressive stress-strain curve of the closed-cell aluminum foam
图 4 高速摄影拍摄复合弹冲击UHMWPE前置复合板图片
Figure 4. The high-speed photographic sequence of the composite projectile impacting the front-positioned UHMWPE specimen
图 5 复合弹冲击UHMWPE前置复合板的失效模式示意图
Figure 5. Schematic diagram of failure modes of the front-positioned UHMWPE specimen subjected to the composite projectile impact
图 6 高速摄影拍摄复合弹冲击UHMWPE后置复合板图片
Figure 6. The high-speed photographic sequence of the composite projectile impacting the back-positioned UHMWPE specimen
图 7 复合弹冲击UHMWPE后置复合板的失效模式示意图
Figure 7. Schematic diagram of failure modes in the back-positioned UHMWPE specimen subjected to the composite projectile impact
图 11 50 μs时前置构型P3和后置构型Q2内各组分材料吸能对比
Figure 11. Comparison of energy absorption by component materials in front configuration P3 and back configuration Q2 at 50 μs
图 12 前置构型P3和后置构型Q2的动态变形过程
Figure 12. The dynamic deformation processes of front configuration P3 and back configuration Q2
图 13 初始速度-最大背凸变形散点图
Figure 13. The initial velocity-peak vs. back-face deformation graph
表 1 UHMWPE材料参数
Table 1. Material parameters of UHMWPE
type areal density/(g·m-2) ply thickness/mm elastic modulus/GPa tensile strength/GPa HA-792 125±5 0.15±0.02 34 1.2 
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表 2 复合弹冲击靶板实验结果
Table 2. Experimental results of the target plate subjected to the composite projectile impact
case specimen configuration initial velocity/(m·s-1) residual velocity of FSP/(m·s-1) back-face deformation/mm P1 front-positioned UHMWPE 261.35 0 42.94 P2 front-positioned UHMWPE 280.02 205.35 46.03 P3 front-positioned UHMWPE 336.02 242.68 47.90 P4 front-positioned UHMWPE 373.36 330.20 53.02 Q1 back-positioned UHMWPE 298.00 0 50.78 Q2 back-positioned UHMWPE 339.78 0 56.38 Q3 back-positioned UHMWPE 369.21 0 64.22 Q4 back-positioned UHMWPE 392.02 0 76.54 Q5 back-positioned UHMWPE 410.69 168.01 77.28
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表 3 MAT_PLASTIC_KINEMATIC本构模型中的Q235钢材料参数[17-18]
Table 3. Material parameters of Q235 steel for the MAT_PLASTIC_KINEMATIC constitutive model[17-18]
ρ/(kg·m-3) E/GPa ν σ0/MPa Et/GPa β C/s-1 P FS 7 850 206 0.3 345 6.18 0 40 5 0.28
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表 4 MAT_COMPOSITE_FAILURE_SOLID_MODEL本构模型中的UHMWPE复合材料参数[15]
Table 4. Material parameters of the UHMWPE composite for the MAT_COMPOSITE_FAILURE_SOLID_MODEL constitutive model[15]
ρ/(kg·m-3) Ea, Eb/GPa Ec/GPa Gac, Gbc/GPa Gab/GPa 970 34.257 5.1 0.547 8 0.173 8 νca, νcb νba Ta, Tb/GPa Cc/GPa Ca, Cb/MPa 0.013 0 1.25 1.74 725
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