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MOCK JR W . DROTAR J T . Effect of aluminum particle size on the impact initiation of pressed PTFE/Al composite rods [C ] // Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter . Washington,D.C.,US : American Institute of Physics Publishing , 2007 : 971 - 974 .

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WANG H F , GENG B Q , GUO H G , et al . The effect of sintering and cooling process on geometry distortion and mechanical properties transition of PTFE/Al reactive materials [J ] . Defence Technology , 2020 , 16 ( 3 ): 720 - 730 . DOI: 10.1016/j.dt.2019.10.006 http://doi.org/10.1016/j.dt.2019.10.006 In this research, the effect of the sintering and cooling process on geometry distortion and mechanical properties of PTFE/Al reactive material is investigated. Six particularly selected sintering temperatures, three different cooling modes (annealing cooling, normalizing cooling and rapid cooling), three different initial cooling temperatures, as well as six different final cooling temperatures were designed to compare the effects of sintering temperature, cooling rate, initial cooling temperature and final cooling temperature on the properties of reactive materials. Geometry distortion was quantitatively analyzed by a statistic on the dimensional changes of the specimens and microscopic morphology. A mechanical response properties transition from brittle to ductile was found and analyzed. By combining the thermodynamic properties of PTFE and unsteady heat conduction theory, mechanisms of cooling induced morphology change, temperature induced distortion and strength decrease were obtained. The results showed that the cooling rate has the most significant effect on the morphology transformation, while initial cooling temperature has more significant effect on the dimensional distortion than final cooling temperature. As to the mechanical properties transition from brittle to plastic, a more prominent effect of initial cooling temperature than cooling rate and final temperature was revealed. © 2019 The Authors

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张雪朋 , 肖建光 , 余庆波 , 等 . 活性药型罩聚能装药破甲后效超压特性 [J ] . 兵工学报 , 2016 , 37 ( 8 ): 1388 - 1394 . DOI: 10.3969/j.issn.1000-1093.2016.08.007 http://doi.org/10.3969/j.issn.1000-1093.2016.08.007 采用实验研究和理论分析相结合的方法，对活性药型罩聚能装药破甲后效超压特性进行了研究。通过地面静爆实验，测试了活性药型罩聚能装药穿透不同厚度靶板后的内爆超压特性。结果表明，在给定活性药型罩聚能装药结构的条件下，内爆超压随穿靶厚度基本呈抛物线衰减规律。进一步结合准定常理想不可压缩流体力学理论，引入活性材料能量释放激活延时参数，建立了破甲后效超压半经验分析模型。利用该模型预测的活性射流破甲后效超压与实验测试结果吻合较好。分析了活性材料能量释放激活延时对破甲后效超压的影响特性。

ZHANG X P , XIAO J G , YU Q B , et al . Armor penetration aftereffect overpressure produced by reactive material liner shaped charge [J ] . Acta Armamentarii , 2016 , 37 ( 8 ): 1388 - 1394 . (in Chinese)

张昊 , 王海福 , 余庆波 , 等 . 活性射流侵彻钢筋混凝土靶后效超压特性 [J ] . 兵工学报 , 2019 , 40 ( 7 ): 1365 - 1372 . DOI: 10.3969/j.issn.1000-1093.2019.07.005 http://doi.org/10.3969/j.issn.1000-1093.2019.07.005 为研究活性射流侵彻钢筋混凝土靶后效超压效应，采用实验、理论与数值仿真相结合的方法，开展了活性药型罩聚能装药作用钢筋混凝土靶后效超压特性研究。实验结果表明，在聚能装药结构一定条件下，低密度活性射流较高密度活性射流对钢筋混凝土靶的侵彻孔径更大，穿靶后在密闭空间内爆燃产生的冲击波峰值超压更高，且超压-时间曲线呈现出多峰现象。引入虚拟爆炸点的方法，建立了活性射流靶后爆燃超压与高能炸药爆炸等效分析模型，结合AUTODYN-3D有限元分析，得出模型预测的后效超压-时间曲线与实验结果吻合较好，揭示了活性射流在靶后密闭空间内爆燃超压传播规律及多峰现象。

ZHANG H , WANG H F , YU Q B , et al . Aftereffect overpressure of reactive jet perforating into reinforced concrete [J ] . Acta Armamentarii , 2019 , 40 ( 7 ): 1365 - 1372 . (in Chinese) DOI: 10.3969/j.issn.1000-1093.2019.07.005 http://doi.org/10.3969/j.issn.1000-1093.2019.07.005 In order to investigate the aftereffect overpressure characteristics of reactive jet penetrating into reinforced concrete, the experimental, theoretical and numerical simulation methods are used to study the aftereffect overpressure characteristics of reactive liner shaped charge against reinforced concrete. Experimental results show that, for the same shaped charge configuration, the low density reactive jet produces a larger diameter penetration hole on the reinforced concrete and a higher peak overpressure in a closed space compared with the high density reactive jet, and the overpressure-time curves reveal multi-peaks phenomenon. An equivalent model for aftereffect deflagration overpressure of reactive jet and high explosive explosion is developed by using the virtual explosion point method.AUTODYN-3D finite element analysis shows that the predicted aftereffect overpressure-time curves are well agreement with the experimental results, and the propagation characteristics and multi-peaks phenomenon of reactive jet in the closed space are also revealed. Key

苏成海 , 李宗谕 , 郑元枫 , 等 . 活性药型罩聚能装药侵彻爆燃试验及耦合作用机理分析 [J ] . 兵工学报 , 2023 , 44 ( 2 ): 334 - 344 . DOI: 10.12382/bgxb.2021.0645 http://doi.org/10.12382/bgxb.2021.0645 为研究氟聚物基活性药型罩聚能装药对钢靶的侵彻爆燃行为及耦合作用机理,开展配方为质量分数73.5%聚四氟乙烯(PTFE)/26.5%Al活性药型罩聚能装药作用钢靶静爆实验,获得炸高对侵彻深度、侵彻孔径、钢靶爆裂行为影响特性。实验结果表明,活性药型罩聚能装药炸高在0.35~1.00倍装药直径范围内,对钢靶侵爆耦合毁伤效应最为显著。结合准定常理想不可压缩流体力学理论,引入活性射流反应延迟时间,给出活性射流侵彻深度与反应延迟时间函数关系,建立活性射流侵孔内有效质量模型;基于修正的伯努利方程,结合活性射流内爆特性,发展活性射流侵孔孔径理论模型;结合圆筒破坏理论提出活性射流侵爆耦合作用下钢靶爆裂行为判断方法。理论模型定量化描述了活性射流对钢靶的侵爆行为,揭示了破甲终止后活性射流内爆超压导致的扩孔与钢靶爆裂机理。

SU C H , LI Z Y , ZHENG Y F , et al . Penetration-deflagration experiment and coupling mechanism of reactive liner shaped charge [J ] . Acta Armamentarii , 2023 , 44 ( 2 ): 334 - 344 . (in Chinese) DOI: 10.12382/bgxb.2021.0645 http://doi.org/10.12382/bgxb.2021.0645 To investigate the penetration-deflagration behaviors and coupling mechanism of fluoropolymers based reactive liner shaped charge against steel target, the damage experiment of 73.5% PTFE (Polytetrafluoroethylene)/26.5% Al reactive liner shaped charge impacting the steel target is carried out, and the effects of stand-off on the penetration depth, penetration aperture, and burst behaviors of the steel target are obtained. The results show that the coupling damage effect of penetration and burst of reactive liner shaped charge on the steel target is most significant when the stand-off is in the range of 0.35 CD ~1.00 CD . On this basis, combining the theory of quasi-steady incompressible fluid mechanics, a function between the penetration depth and reaction delay of the reactive jet is given by introducing the reaction delay, and the effective mass model of the reactive jet inside the penetration hole is further developed. Based on the modified Bernoulli equation, combining the interior explosion characteristics of the reactive jet, a theoretical model for the reactive jet's penetration aperture diameter is developed. Using the cylinder failure theory, a method for judging the burst behaviors of a steel target under the coupling damage effect of penetration and burst of the reactive jet is proposed. The theoretical model quantitatively describes the coupling damage the reactive jet causes to the steel target and reveals the mechanism for the expansion of the hole and burst of the steel target caused by overpressure after the armor penetration is terminated.

刘澳昕 , 张甲浩 , 周晟 , 等 . 活性弹丸侵彻陶瓷靶板爆裂毁伤行为研究 [J ] . 兵工学报 , 2025 , 46 ( 6 ): 240521 . DOI: 10.12382/bgxb.2024.0521 http://doi.org/10.12382/bgxb.2024.0521 为揭示活性弹丸侵彻陶瓷靶板爆裂毁伤机理,开展活性弹丸冲击陶瓷靶板弹道碰撞实验,得到不同撞击速度下活性弹丸侵彻陶瓷靶板的爆裂毁伤行为及靶板碎片云飞散特性。基于一维应力波理论、活性材料激活假设,分析活性弹丸冲击激活行为。结合伯努利公式建立活性弹丸侵彻陶瓷靶板爆裂毁伤行为分析模型。综合实验及理论对不同速度下活性弹丸侵彻陶瓷靶板的爆裂毁伤行为进行讨论,从靶板毁伤模式、弹丸激活特性、靶后碎片云飞散特性等方面开展深入分析。分析结果表明:爆燃反应对活性弹丸侵彻陶瓷靶板的作用行为影响显著;随着速度的增大,活性弹丸爆燃反应更加剧烈,对靶板毁伤效应增强,陶瓷靶板毁伤程度不断加剧,毁伤模式从整体开裂到中心开坑四周辐射,随后演化为爆裂破碎;随着速度的增大,冲击形成陶瓷锥质量不断增大,陶瓷碎片飞散速度先增大后减小,靶后碎片云形态呈现由类截椭圆到梭镖状的变化趋势。

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XUE Z Q , LI S P , XIN C L , et al . Modeling of the whole process of shock wave overpressure of free-field air explosion [J ] . Defence Technology , 2019 , 15 ( 5 ): 815 - 820 . DOI: 10.1016/j.dt.2019.04.014 http://doi.org/10.1016/j.dt.2019.04.014 The waveform of the explosion shock wave under free-field air explosion is an extremely complex problem. It is generally considered that the waveform consists of overpressure peak, positive pressure zone and negative pressure zone. Most of current practice usually considers only the positive pressure. Many empirical relations are available to predict overpressure peak, the positive pressure action time and pressure decay law. However, there are few models that can predict the whole waveform. The whole process of explosion shock wave overpressure, which was expressed as the product of the three factor functions of peak, attenuation and oscillation, was proposed in the present work. According to the principle of explosion similarity, the scaled parameters were introduced and the empirical formula was absorbed to form a mathematical model of shock wave overpressure. Parametric numerical simulations of free-field air explosions were conducted. By experimental verification of the AUTODYN numerical method and comparing the analytical and simulated curves, the model is proved to be accurate to calculate the shock wave overpressure under free-field air explosion. In addition, through the model the shock wave overpressure at different time and distance can be displayed in three dimensions. The model makes the time needed for theoretical calculation much less than that for numerical simulation. © 2019 The Authors

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DU N , XIONG W , WANG T , et al . Study on energy release characteristics of reactive material casings under explosive loading [J ] . Defence Technology , 2021 , 17 ( 5 ): 1791 - 1803 . DOI: 10.1016/j.dt.2020.11.008 http://doi.org/10.1016/j.dt.2020.11.008 Reactive Materials (RMs), a new material with structural and energy release characteristics under shock-induced chemical reactions, are promising in extensive applications in national defense and military fields. They can increase the lethality of warheads due to their dual functionality. This paper focuses on the energy release characteristics of RM casings prepared by alloy melting and casting process under explosive loading. Explosion experiments of RM and conventional 2A12 aluminum alloy casings were conducted in free field to capture the explosive fireballs, temperature distribution, peak overpressure of the air shock wave and the fracture morphology of fragments of reactive material (RM) warhead casings by using high-speed camera, infrared thermal imager temperature and peak overpressure testing and scanning electron microscope. Results showed that an increase of both the fireball temperature and air shock wave were observed in all RM casings compared to conventional 2A12 aluminum ally casings. The RM casings can improve the peak overpressure of the air shock wave under explosion loading, though the results are different with different charge ratios. According to the energy release characteristics of the RM, increasing the thickness of RM casings will increase the peak overpressure of the near-field air shock wave, while reducing the thickness will increase the peak overpressure of the far-field air shock wave. © 2021 China Ordnance Society

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