为了获得高能炸药驱动下战斗部壳体破碎机理,选取新型弹体材料30Cr Mn Si Ni2A钢、40Cr Mn Si B钢以及典型弹体材料50Si Mn VB钢,采用超高速摄影技术拍摄壳体静爆,获得了不同弹体材料壳体膨胀破碎过程,引入弹体径向膨胀系数,建立了考虑...为了获得高能炸药驱动下战斗部壳体破碎机理,选取新型弹体材料30Cr Mn Si Ni2A钢、40Cr Mn Si B钢以及典型弹体材料50Si Mn VB钢,采用超高速摄影技术拍摄壳体静爆,获得了不同弹体材料壳体膨胀破碎过程,引入弹体径向膨胀系数,建立了考虑弹体材料性能影响的壳体径向膨胀距离随时间变化的函数关系式,并试验测定了三种材料弹体形成破片的最大初速。分析试验结果发现,新型弹体材料壳体膨胀速度和破片初速更大,相比50Si Mn VB钢壳体,30Cr Mn Si Ni2A钢和40Cr Mn Si B钢壳体形成破片的最大初速分别提高了19.0%和31.9%。不同合金钢材料壳体形成破片初速沿壳体轴向分布规律相同,最大初速出现在距起爆点约70%圆筒长度处。该研究结果将为杀爆战斗部壳体材料选取及设计提供参考依据。展开更多
An in-depth understanding of the fracture behavior and mechanism of metallic shells under internal explosive loading can help develop material designs for warheads and regulate the quantity and mass distribution of th...An in-depth understanding of the fracture behavior and mechanism of metallic shells under internal explosive loading can help develop material designs for warheads and regulate the quantity and mass distribution of the fragments formed.This study investigated the fragmentation performance of a new high-carbon silicon-manganese(HCSiMn)steel cylindrical shell through fragment recovery experiments.Compared with the conventional 45Cr steel shell,the number of small mass fragments produced by the HCSi Mn steel shell was significantly increased with a scale parameter of 0.57 g fitted by the Weibull distribution model.The fragmentation process of the HCSi Mn shell exhibited more brittle tensile fracture characteristics,with the microcrack damage zone on the outer surface being the direct cause of its high fragmentation.On the one hand,the doping of alloy elements resulted in grain refinement by forming metallographic structure of tempered sorbite,so that microscopic intergranular fracture reduces the characteristic mass of the fragments;on the other hand,the distribution of alloy carbides can exert a"pinning"effect on the substrate grains,causing more initial cracks to form and propagate along the brittle carbides,further improving the shell fragmentation.Although the killing power radius for light armored vehicles was slightly reduced by about 6%,the dense killing radius of HCSiMn steel projectile against personnel can be significantly increased by about 26%based on theoretical assessment.These results provided an experimental basis for high fragmentation warhead design,and to some extent,revealed the correlation mechanism between metallographic structure and shell fragmentation.展开更多
本文对最高束流能量为290 A MeV的^(12)C核诱发铝靶核反应射弹碎裂电荷变化反应总截面及碎片粒子产生分截面进行研究.结果显示射弹碎裂电荷变化总截面及碎片粒子产生分截面在误差范围内与束流能量无关,核碎裂电荷变化总截面计算结果与Br...本文对最高束流能量为290 A MeV的^(12)C核诱发铝靶核反应射弹碎裂电荷变化反应总截面及碎片粒子产生分截面进行研究.结果显示射弹碎裂电荷变化总截面及碎片粒子产生分截面在误差范围内与束流能量无关,核碎裂电荷变化总截面计算结果与Bradt-Peter公式及PHITS,NUCFRG2理论模型预测值一致,碎片粒子产生分截面值与NUCFRG2理论模型预测值一致.展开更多
The conditional moments of the charge distributions of the projectile frag-ments in <sup>16</sup>O and <sup>32</sup>S fragmentation behaviour are obtained by using a partition meth-od.The logar...The conditional moments of the charge distributions of the projectile frag-ments in <sup>16</sup>O and <sup>32</sup>S fragmentation behaviour are obtained by using a partition meth-od.The logarithmic correlations between the conditional moments are observed,Thecalculated results are in agreement with the experimental data of 3.7 and 200GeV N <sup>16</sup>O-emulsion and 200 GeV/N <sup>32</sup>S-emulsion interactions.展开更多
文摘为了获得高能炸药驱动下战斗部壳体破碎机理,选取新型弹体材料30Cr Mn Si Ni2A钢、40Cr Mn Si B钢以及典型弹体材料50Si Mn VB钢,采用超高速摄影技术拍摄壳体静爆,获得了不同弹体材料壳体膨胀破碎过程,引入弹体径向膨胀系数,建立了考虑弹体材料性能影响的壳体径向膨胀距离随时间变化的函数关系式,并试验测定了三种材料弹体形成破片的最大初速。分析试验结果发现,新型弹体材料壳体膨胀速度和破片初速更大,相比50Si Mn VB钢壳体,30Cr Mn Si Ni2A钢和40Cr Mn Si B钢壳体形成破片的最大初速分别提高了19.0%和31.9%。不同合金钢材料壳体形成破片初速沿壳体轴向分布规律相同,最大初速出现在距起爆点约70%圆筒长度处。该研究结果将为杀爆战斗部壳体材料选取及设计提供参考依据。
基金funded by the National Natural Science Foundation of China (Grant Nos.12302444 and 12202349)。
文摘An in-depth understanding of the fracture behavior and mechanism of metallic shells under internal explosive loading can help develop material designs for warheads and regulate the quantity and mass distribution of the fragments formed.This study investigated the fragmentation performance of a new high-carbon silicon-manganese(HCSiMn)steel cylindrical shell through fragment recovery experiments.Compared with the conventional 45Cr steel shell,the number of small mass fragments produced by the HCSi Mn steel shell was significantly increased with a scale parameter of 0.57 g fitted by the Weibull distribution model.The fragmentation process of the HCSi Mn shell exhibited more brittle tensile fracture characteristics,with the microcrack damage zone on the outer surface being the direct cause of its high fragmentation.On the one hand,the doping of alloy elements resulted in grain refinement by forming metallographic structure of tempered sorbite,so that microscopic intergranular fracture reduces the characteristic mass of the fragments;on the other hand,the distribution of alloy carbides can exert a"pinning"effect on the substrate grains,causing more initial cracks to form and propagate along the brittle carbides,further improving the shell fragmentation.Although the killing power radius for light armored vehicles was slightly reduced by about 6%,the dense killing radius of HCSiMn steel projectile against personnel can be significantly increased by about 26%based on theoretical assessment.These results provided an experimental basis for high fragmentation warhead design,and to some extent,revealed the correlation mechanism between metallographic structure and shell fragmentation.
文摘本文对最高束流能量为290 A MeV的^(12)C核诱发铝靶核反应射弹碎裂电荷变化反应总截面及碎片粒子产生分截面进行研究.结果显示射弹碎裂电荷变化总截面及碎片粒子产生分截面在误差范围内与束流能量无关,核碎裂电荷变化总截面计算结果与Bradt-Peter公式及PHITS,NUCFRG2理论模型预测值一致,碎片粒子产生分截面值与NUCFRG2理论模型预测值一致.
基金The project supported by the National Natural Science Foundation of China.
文摘The conditional moments of the charge distributions of the projectile frag-ments in <sup>16</sup>O and <sup>32</sup>S fragmentation behaviour are obtained by using a partition meth-od.The logarithmic correlations between the conditional moments are observed,Thecalculated results are in agreement with the experimental data of 3.7 and 200GeV N <sup>16</sup>O-emulsion and 200 GeV/N <sup>32</sup>S-emulsion interactions.
