Behaviour of a commercial wired glass under low energy ballistic impact
Behaviour of a commercial wired glass under low energy ballistic impact
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发表时间：
2004
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通讯作者：
S. Atiq;R. Rawlings;A. Boccaccini
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作者：
S. Atiq;R. Rawlings;A. Boccaccini
使用速度高达 400 m/s 的气枪对商用夹丝玻璃的防弹性能进行了研究。弹丸是钢球，使用的冲击能量高达 7.32 J。冲击损坏的程度通过喷射材料的质量、冲击留下的赫兹锥体面积和残余强度来评估。观察到与单片玻璃中报道的裂纹形态相似的裂纹形态，即环形裂纹、圆锥形裂纹和放射状裂纹。喷射材料质量和锥体面积的冲击能量依赖性相似，显示在能量高于约 4.35 J 时快速增加。相反，无论冲击能量如何，残余强度仍保持在原始夹丝玻璃的 20% 或更低。这是因为在所研究的弹道冲击条件下，金属丝网保持完好无损。
A study of the ballistic impact resistance of a commercial wired glass has been undertaken using a gas gun capable of velocities up to 400 m/s. The projectile was a steel ball and impact energies up to 7.32 J were used. The extent of the impact damage was assessed by the mass of ejected material, the area of the Hertzian cone left by the impact and residual strength. Crack morphologies similar to those reported in monolithic glasses were observed, namely ring, cone and radial cracks. The impact energy dependencies of the mass of ejected material and cone area were similar showing a rapid increase at energies above about 4.35 J. In contrast, the residual strength remained at 20% or less of the as-received wired glass irrespective of impact energy. This was attributed to the wire mesh remaining intact for the ballistic impact conditions investigated.