陶瓷复合装甲粘结层效应和抗多发打击性能的数值模拟研究

粘结层性能对陶瓷复合装甲抗多发打击性能有重要影响。建立了研究粘结层和多发打击的数值模拟方法,解决了传统方法不能模拟“脱粘”和多发打击的问题。基于文献弹道试验,研究了环氧树脂和聚氨酯两种粘结层材料及其厚度对陶瓷/铝合金复合装甲抗7.62mm 穿甲弹单发和两发打击性能的影响。结果表明:单发打击的数值模拟可不建粘结层,而多发打击应采用建粘结层的方法;抗单发打击时,粘结层越薄,极限速度越大;抗多发打击时,陶瓷复合装甲应采用聚氨酯粘结层,且其抗两发打击的较优厚度约为0.40mm。

A NUMERICAL STUDY ON ADHESIVE LAYER EFFECTS AND THE PROTECTION CAPABILITY OF CERAMIC COMPOSITE ARMORS AGAINST MULTI-HIT

Adhesive layer performances have important influences on the protection capability of ceramic composite armors against a multi-hit.The numerical methods were founded to simulate the ceramics debonding of composite armors.Based on published ballistic experiments,for two different adhesives epoxy and polyurethane,the material and thickness effects to the protection capability of ceramic/aluminum composite armors against a single hit and two hits were numerically investigated.The results show that the method without setting an adhesive layer may be employed to study a single impact,but in the condition of a multi-hit,the method with setting adhesive layers should be adopted.When against a single impact,the limit velocity of composite armors increases as the adhesive layers getting thinner.The polyurethane adhesive layer should be used in composite armors against a multi-hit and its better thickness is about 0.4 mm when the composite armors against two hits.