Impact-induced initiation thresholds of polytetrafluoroethylene/Al composite by gas gun
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摘要: 基于16 mm口径气炮撞击实验，对铝颗粒增强的聚四氟乙烯(polytetrafluoroethylene)/Al(PTFE/Al)冲击反应复合材料的冲击反应阈值开展了研究。为研究不同撞击加载条件下应变率和碰撞应力对PTFE/Al冲击诱发反应的影响，实验中采用铝、钢和低密度聚乙烯(low density polyethylene, LDPE)这3种不同材料的靶板及不同长度的试样，进行不同加载条件下的测试分析。实验结果显示，PTFE/Al材料的冲击诱发同时受到碰撞压力和加载应变率的影响。同时，通过对试样撞靶过程进行数值模拟，并与实验和理论结果进行对比。基于实验数据，拟合出PTFE/Al材料冲击反应的的预测曲线。Abstract: Impact experiments by a gas gun were conducted to investigate the impact-induced initiation thresholds of a PTFE (polytetrafluoroethylene)/Al composite using targets of steel, aluminum and low-density polyethylene (LDPE) materials and sample rods of four different lengths. By subjecting the samples under different loading conditions, it is shown that the impact-induced initiation of PTFE/Al is determined by both the impact pressure and the loading strain rate. The impact pressure and the strain rate thresholds for initiation were arrested by the experiments and the impacting process of the samples was modeled to compare the experimental and theoretical data. Based on all the experimental results, a theoretical curve was proposed to predict the impact-induced initiation of PTFE/Al under normal impact. The method proposed in this research can also be used in the study of other energetic materials.
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Key words:
- impact-induced initiation /
- thresholds /
- PTFE/Al /
- impact experiments
1) “第十一届全国爆炸力学学术会议”推荐论文 -
图 4 试样正撞击钢靶的高速摄影结果
Figure 4. High-speed video sequences of samples normally impacting steel targets
图 5 试样撞击不同材料靶板时撞击速度与碰撞压力关系
Figure 5. Relation between impact velocities and impact pressures during samples impacting different targets
图 6 试样撞击不同靶板时碰撞压力和加载应变率关系
Figure 6. Relation between impact pressure and loading strain rate during samples' impacting different targets
图 7 PTFE/Al材料在Taylor撞击实验中的剪切作用聚集区和冲击反应的出现位置
Figure 7. Intense shear region and first sign of ignition during Taylor anvil-on-rod impact test for PTFE/Al
图 8 数值模拟下PTFE/Al材料Taylor撞击中剪切应力分布
Figure 8. Shear stress distribution during Taylor anvil-on-rod impact test for PTFE/Al in simulation
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[1] JOSHI V S. Process for making polytetrafluoroethylene-aluminium composite and product made: US6547993[P]. 2003. [2] 阳世清, 徐松林, 张彤. Al/PTFE反应材料制备工艺及性能[J].国防科技大学学报, 2008, 30(6):40-42. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=gfkj200806010&dbname=CJFD&dbcode=CJFQYANG Shiqing, XU Songlin, ZHANG Tong. Preparation and performance of PTEF/Al reactive materials[J]. Journal of National University of Defense Technology, 2008, 30(6):40-42. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=gfkj200806010&dbname=CJFD&dbcode=CJFQ [3] 赵鹏铎, 卢芳云, 李俊玲, 等.活性材料Al/PTFE动态压缩性能[J].含能材料, 2009, 17(4):459-462. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=hncl200904023&dbname=CJFD&dbcode=CJFQZHAO Pengduo, LU Fangyun, LI Junling, et al. The dynamic compressive properties of Al/PTFE reactive materials[J]. Chinese Journal of Energetic Materials, 2009, 17(4):459-462. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=hncl200904023&dbname=CJFD&dbcode=CJFQ [4] 徐松林, 阳世清, 赵鹏铎, 等.Al/PTFE含能复合材料的压缩力学行为研究[J].力学学报, 2009, 41(5):708-712. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=lxxb200905014&dbname=CJFD&dbcode=CJFQXU Songlin, YANG Shiqing, ZHAO Pengduo, et al. The study on the compressive behavior of Al/PTFE energetic composite[J]. Chinese Journal of Theoretical and Applied Mechanics, 2009, 41(5):708-712. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=lxxb200905014&dbname=CJFD&dbcode=CJFQ [5] 王海福, 刘宗伟, 俞为民, 等.活性破片能量输出特性试验研究[J].北京理工大学学报, 2009, 29(8):663-666. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=bjlg200908003&dbname=CJFD&dbcode=CJFQWANG Haifu, LIU Zongwei, YU Weimin, et al. Experimental investigation of energy release characteristics of reactive fragments[J]. Transactions of Beijing Institute of Technology, 2009, 29(8):663-666. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=bjlg200908003&dbname=CJFD&dbcode=CJFQ [6] MOCK J W, DROTAR J T. Effect of Al particle size on the impact initiation of pressed Al/PTFE composite rods[J]. Shock Compression of Condensed Matter, 2007(6):971-974. doi: 10.1063/1.2833292 [7] 乌布力艾散·麦麦提图尔荪, 董永香, 葛超, 等.基于Al/PTFE真实细观特性统计模型的宏观力学性能模拟[J].复合材料学报, 2016, 33(11):2528-2536. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=fuhe201611016&dbname=CJFD&dbcode=CJFQMAIMAITITUERSUN Wubuliaisan, DONG Yongxiang, GE Chao, et al. Simulation on mechanical properties of Al/PTFE based on mesoscopic statistical model[J]. Acta Materiae Compositae Sinica, 2016, 33(11):2528-2536. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=fuhe201611016&dbname=CJFD&dbcode=CJFQ [8] 帅俊峰, 蒋建伟, 王树有, 等.复合反应破片对钢靶侵彻的实验研究[J].含能材料, 2009, 17(6):722-725. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=hncl200906024&dbname=CJFD&dbcode=CJFQSHUAI Junfeng, JIANG Jianwei, WANG Shuyou, et al. Compound reactive fragment penetrating steel target[J]. Chinese Journal of Energetic Materials, 2009, 17(6):722-725. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=hncl200906024&dbname=CJFD&dbcode=CJFQ [9] 谢长友, 蒋建伟, 帅俊峰, 等.复合反应破片对柴油油箱的毁伤效应实验研究[J].高压物理学报, 2009, 23(6):447-452. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=gywl200906009&dbname=CJFD&dbcode=CJFQXIE Changyou, JIANG Jianwei, SHUAI Junfeng, et al. Experimental study on the damage effect of compound reactive fragment penetrating diesel oil tank[J]. Chinese Journal of High Pressure Physics, 2009, 23(6):447-452. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=gywl200906009&dbname=CJFD&dbcode=CJFQ [10] AMES R G. Vented chamber calorimetry for impact-nitiated energetic materials[C]//The 43rd AIAA Aerospace Sciences Meeting and Exhibit. Reno, Nevada, United States, 2005: 275-279. [11] LEE R, MOCK J W, CARNEY J, et al. Reactive materials studies[C]//Shock Compression of Condensed Matter 2005: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter. Baltimore, Maryland, United States, 2005: 169-174 [12] HUNT E M, MALCOLM S, PANTOYA M L, DAVIS F. Impact ignition of nano and micron composite energetic materials[J]. International Journal of Impact Engineering, 2009, 36(6):842-846. doi: 10.1016/j.ijimpeng.2008.11.011 [13] ZHANG X, SHI A, QIAO L, et al. Experimental study on impact-initiated characters of multifunctional energetic structural materials[J]. Journal of Applied Physics, 2013, 113(8):2129-1156. https://ieeexplore.ieee.org/document/6471104/ [14] MOCK J W, HOLT W H. Impact initiation of rods of pressed polytetrafluoroethylene (PTFE) and aluminum powders[C]//Shock Compression of Condensed Matter 2005: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter. Baltimore, Maryland, United States, 2005: 1097-1100. [15] MEYERS M A. Dynamic behavior of materials[M]. John Wiley & Sons, Inc.1994. [16] RAFTENBERG M N, MOCK J W, KIRBY G C. Modeling the impact deformation of rods of a pressed PTFE/Al composite mixture[J]. International Journal of Impact Engineering, 2008, 35(12):1735-1744. doi: 10.1016/j.ijimpeng.2008.07.041 [17] AMES R G. Energy release characteristics of impact-initiated energetic materials[J]. Materials Research Society Symposium Proceedings, 2005, 896(3):321-333. https://www.mendeley.com/research-papers/energy-release-characteristics-impactinitiated-energetic-materials/ -
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