Through quantitative statistics and morphological characterization of ceramic fragments for ceramic composite bulletproof insert plates(CCBIPs),distribution characteristics of ceramic fragments within a specific size ...Through quantitative statistics and morphological characterization of ceramic fragments for ceramic composite bulletproof insert plates(CCBIPs),distribution characteristics of ceramic fragments within a specific size range were analyzed for different Armor Piercing Incendiary(API)and shot times.To quantitatively evaluate the effect of energy absorption for ceramic plates,a model of energy absorption during penetration for CCBIPs was established based on statistics of the size distribution of ceramic fragments(SDCF).Variation in the SDCF and its influence on energy absorption for CCBIPs were investigated.The results indicate that the distribution feature of ceramic fragments in the range of 0.25-2.25 mm is Gaussian distribution.Compared with Type 56 of API(56-API),ceramic fragments formed by 53-API with higher kinetic energy possess more quantity and more concentrated distribution,whose average equivalence size decreases by 6.5%,corresponding to increasing by 83.9%of estimated energy absorption.Besides,the ability of CCBIPs to resist the third shot is significantly weakened,whose estimated energy absorption decreases by 58.8%compared with the first shot.More concentrated distribution and fewer fragments are formed after the third shot,the average equivalence size of ceramic fragments increases by 6.9%,which may attribute to the micro-cracks induced by the previous two shots.展开更多
Bulletproof steel plates are widely used for the safety of special vehicles.This paper mainly researches on the shoot resistance of heat treated light weight B-grade bulletproof steel plates through numerical analysis...Bulletproof steel plates are widely used for the safety of special vehicles.This paper mainly researches on the shoot resistance of heat treated light weight B-grade bulletproof steel plates through numerical analysis.Based on the flow behavior of bulletproof steel plates and bullet at various high strain rates,finite element(FE) model has been set up using ANSYS/LS-DYNA software.The simulation results are compared with the shooting results,which show a good consistency and a high reliability.Therefore,the simulation results are efficient approaches and strategies to decide and select the mechanical property and thickness of bulletproof steel plates,saving a lot of work and the cost of experiments.展开更多
随着枪械武器的更新换代,弹体的侵彻能力逐渐增强,软体防弹装甲成为现代战场上不可或缺的装备之一。通过ANSYS/LS-DYNA建立了软体防弹靶板的冲击有限元模型,搭建了普通弹侵彻UHMWPE纤维层合板的冲击试验平台,验证了模拟方法的有效性,确...随着枪械武器的更新换代,弹体的侵彻能力逐渐增强,软体防弹装甲成为现代战场上不可或缺的装备之一。通过ANSYS/LS-DYNA建立了软体防弹靶板的冲击有限元模型,搭建了普通弹侵彻UHMWPE纤维层合板的冲击试验平台,验证了模拟方法的有效性,确定了多层软体靶板抗冲击性能较佳的铺层方式,采用遗传算法优化了软体防弹靶板结构。结果表明:纤维层合板采用[0°/30°/60°/90°/120°]_n铺层方式,碳纤维层合板置于迎弹面,UHMWPE纤维层合板置于背弹面,且UHMWPE纤维层合板占比较高时,靶板的防弹性能更好;优化后的0.6 mm面层阻尼/5.1 mm CF层合板/9.4 mm UHMWPE纤维层合板结构靶板可有效抵抗7.62 mm普通弹的侵彻,在相同防弹性能条件下,与装甲钢结构靶板相比,该靶板面密度降低超过53.4%。展开更多
基金financially supported by the National Key Research&Development Project(2017YFB1103505)the Military Logistics Research Program(XXXC002)of China。
文摘Through quantitative statistics and morphological characterization of ceramic fragments for ceramic composite bulletproof insert plates(CCBIPs),distribution characteristics of ceramic fragments within a specific size range were analyzed for different Armor Piercing Incendiary(API)and shot times.To quantitatively evaluate the effect of energy absorption for ceramic plates,a model of energy absorption during penetration for CCBIPs was established based on statistics of the size distribution of ceramic fragments(SDCF).Variation in the SDCF and its influence on energy absorption for CCBIPs were investigated.The results indicate that the distribution feature of ceramic fragments in the range of 0.25-2.25 mm is Gaussian distribution.Compared with Type 56 of API(56-API),ceramic fragments formed by 53-API with higher kinetic energy possess more quantity and more concentrated distribution,whose average equivalence size decreases by 6.5%,corresponding to increasing by 83.9%of estimated energy absorption.Besides,the ability of CCBIPs to resist the third shot is significantly weakened,whose estimated energy absorption decreases by 58.8%compared with the first shot.More concentrated distribution and fewer fragments are formed after the third shot,the average equivalence size of ceramic fragments increases by 6.9%,which may attribute to the micro-cracks induced by the previous two shots.
文摘Bulletproof steel plates are widely used for the safety of special vehicles.This paper mainly researches on the shoot resistance of heat treated light weight B-grade bulletproof steel plates through numerical analysis.Based on the flow behavior of bulletproof steel plates and bullet at various high strain rates,finite element(FE) model has been set up using ANSYS/LS-DYNA software.The simulation results are compared with the shooting results,which show a good consistency and a high reliability.Therefore,the simulation results are efficient approaches and strategies to decide and select the mechanical property and thickness of bulletproof steel plates,saving a lot of work and the cost of experiments.
文摘随着枪械武器的更新换代,弹体的侵彻能力逐渐增强,软体防弹装甲成为现代战场上不可或缺的装备之一。通过ANSYS/LS-DYNA建立了软体防弹靶板的冲击有限元模型,搭建了普通弹侵彻UHMWPE纤维层合板的冲击试验平台,验证了模拟方法的有效性,确定了多层软体靶板抗冲击性能较佳的铺层方式,采用遗传算法优化了软体防弹靶板结构。结果表明:纤维层合板采用[0°/30°/60°/90°/120°]_n铺层方式,碳纤维层合板置于迎弹面,UHMWPE纤维层合板置于背弹面,且UHMWPE纤维层合板占比较高时,靶板的防弹性能更好;优化后的0.6 mm面层阻尼/5.1 mm CF层合板/9.4 mm UHMWPE纤维层合板结构靶板可有效抵抗7.62 mm普通弹的侵彻,在相同防弹性能条件下,与装甲钢结构靶板相比,该靶板面密度降低超过53.4%。
