Oblique penetration on CFRPs by steel sphere
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摘要: 为了研究碳纤维复合材料板（CFRPs）在斜侵彻下的抗弹性能，利用一级轻气炮对碳纤维复合材料板进行了70~280 m/s速度范围的0°、30°和45°的侵彻贯穿实验，通过高速摄影技术测量了弹体速度和弹道轨迹。分析了冲击角度对弹道极限、能量吸收和弹道偏转的影响。结果表明：在冲击能量较低时，靶板在正冲击下的能量吸收率比斜冲击高，而当冲击能量较高时则恰好相反；此外，由于弹体穿过层合板的穿透长度随着冲击角度的增加而增加，弹道极限随着冲击角度的增加而增加；而冲击角度对弹道偏转的影响则随着冲击速度的变化而变化。Abstract: In this study we performed a series of penetration tests on specimens of carbon fiber reinforced plastics (CFRPs) using a one-stage gas gun at impact angles of 0°, 30° and 45° at speeds ranging from 70 to 280 m/s to investigate their ballistic resistance behavior in oblique penetration. High speed photography was employed to measure the projectile velocity and ballistic trajectory, and analyzed the influence of the impact angle on their energy absorption, ballistic limit and projectile obliquity variations. The results show that the energy absorption coefficient of the normal impact outperformed the oblique impact at lower impact-energies whereas at the higher impact-energies the ballistic performance was observed to be approximately just the opposite. In addition, due to the increase of the penetration length through the laminate with the impact angle, the ballistic limit increases with the impact angle; the influence of the impact angle on the projectile obliquity varies generally with the impact velocity.
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图 7 冲击速度约为260 m/s的不同靶板的冲击过程
Figure 7. Impact process of different targets at a velocity around 260 m/s
图 8 斜冲击下的弹体偏转角与冲击速度的关系
Figure 8. Variations in projectile obliquity vs. impact velocity for oblique impacts
表 1 实验结果
Table 1. Experimental results
No. vi/(m·s-1) vr/(m·s-1) vi/(m·s-1) vr/(m·s-1) vi/(m·s-1) vr/(m·s-1) θ=0° θ=30° θ=45° 1 71.7 -23.9 70.3 -34.7 74.8 -46.8 2 118.5 -19.4 107.4 -41.6 102.6 -61.4 3 141.8 -21.4 141.6 -31.5 165.2 -60.4 4 164.6 -28.7 172.2 -34.9 192.3 -39.8 5 175.6 -41.8 191.9 -32.4 213.3 -34.7 6 177.2 -28.4 195.2 -10.6 218.7 -16.2 7 178.9 -10.2 197.0 -16.4 220.7 0 8 181.8 -31.3 197.5 27.0 224.4 74.0 9 184.3 34.5 198.4 57.7 225.8 81.2 10 188.2 53.2 199.0 60.8 230.0 107.8 11 190.7 62.5 206.6 58.5 233.3 115.9 12 219.6 125.5 209.0 91.7 242.3 131.1 13 227.1 137.8 238.8 143.3 244.8 139.8 14 257.7 180.4 255.8 171.9 262.8 156.5 15 279.6 203.4 274.8 180.2 276.1 171.8 
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