陶瓷防弹板在多发打击下的损伤累积模拟与残余性能评估

Damage accumulation simulation and residual performance evaluation of ceramic ballistic plate under the multi-hit strikes

陶瓷/纤维材料复合防弹板广泛应用于单兵防护装备,研究其抗多发冲击性能对于减少士兵伤亡有重要意义。基于53式7.62 mm穿燃弹冲击SiC/超高分子量聚乙烯(UHMWPE)防弹板工况,利用数值模拟方法对多次冲击下防弹板的破坏分布和残余抗弹性能进行分析。利用陶瓷、纤维破坏及粘结面剥离程度表征整板损伤,并建立不同损伤区域下防弹板残余性能的分布规律。结果表明:第一次冲击下,防弹板损伤半径(R)为30 mm,当R<15 mm时,损伤(D)>0.6,靶板无法抵御第二发子弹冲击;两次冲击下,两发子弹间距(ΔL)<50 mm时,中间破坏区损伤有明显累加现象,当ΔL>50 mm时,损伤累加效应不显著。将防弹板以5 mm×5 mm网格离散,得到不同损伤面积占比,得出在两次冲击下整板穿透概率为0.94%。3次冲击下的整板穿透概率与第二次冲击位置有关,且当ΔL=20 mm时,3次冲击下整板穿透概率达到1.94%。

The ceramic/fibre composite ballistic panels are widely used in personal protection equipment,and the performance of the ballistic plate under multiple impact loadings are important to keep soldiers safe.The numerical simulation was used to analyze the failure distribution and residual ballistic performance of ballistic panels subjected to multiple impacting,and specifically focusing on the operating condition of 53-type 7.62 mm armor-piercing bullet impacting SiC/ultra-high molecular weight polyethylene(UHMWPE)ballistic panels.The damage of the ballistic plate was characterized by the ceramic failure,fiber deformation and bond surface stripping,and the residual properties of the bulletproof plate with different damage were established.The results show that the damage radius(R)of ballistic panels is 30 mm under the first impact,and the damage(D)is greater than 0.6 when R<15 mm,and the target can't resist the second bullet impacting.Under two impacts,the damage in the middle zone becomes seriously when the distance between two bullets(ΔL)is less than 50 mm,and the cumulative effect of damage is not significant whenΔL>50 mm.Ballistic panels are discretized with 5 mm×5 mm grid,and the proportions of different damage areas are obtained.The penetration probability of the integral ballistic plate is 0.94%under the two impacts'loadings.The penetration probability of the integral ballistic plate under the third impacting is decided by the striking distance of the first two impacts,and the penetration probability by the third impacting is 1.94%whenΔL=20 mm.