落锤加载下反应材料的反应性能
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摘要
为了研究反应材料在落锤加载下的反应性能,利用10kg落锤直接加载反应材料,获得了材料在落锤不同落高加载下的应力—时间曲线;将应力—时间曲线和高速摄影拍摄结果进行了对比,并分析计算了单位质量材料在发生反应时的吸收能量;基于材料的Johnson-Cook本构模型,使用有限元计算软件LS-DYNA计算了加载过程中的材料力学性能变化。结果表明,在无约束情况下使用10kg落锤加载,随着落锤下落高度的增加,应力随时间的变化越快,材料在1000μs时发生反应,对应的临界应力为281MPa,单位质量反应材料在发生反应时吸收的能量为40.9J/g,数值计算结果与实验结果能够吻合,进一步验证了材料Johnson-Cook本构模型的合理性。
To investigate the reactive properties of reactive material under the load of drop-weight, the stress—time curves of material under different drop height loading of drop-weight were obtained by directly loading reactive material with a 10 kg drop-weight. The stress—time curves were compared with the results of high-speed photographs, and the absorption energy of the unit mass of material during the reaction was analyzed and calculated. Based on the Johnson-Cook constitutive model of materials, the changes of mechanical properties during loading were calculated by using finite element calculation software LS-DYNA. The results show that under unconstrained loading with 10 kg drop-weight, the stress changes rapidly with time with increasing the drop-weight height, the material reacts at 1000μs, the corresponding critical stress is 218 MPa, and the energy absorbed by the unit mass of material during the reaction is 40.9 J/g. The simulation results are in agreement with the experimental ones and further verify the rationality of the Johnson-Cook′s constitutive model of materials.
To investigate the reactive properties of reactive material under the load of drop-weight, the stress—time curves of material under different drop height loading of drop-weight were obtained by directly loading reactive material with a 10 kg drop-weight. The stress—time curves were compared with the results of high-speed photographs, and the absorption energy of the unit mass of material during the reaction was analyzed and calculated. Based on the Johnson-Cook constitutive model of materials, the changes of mechanical properties during loading were calculated by using finite element calculation software LS-DYNA. The results show that under unconstrained loading with 10 kg drop-weight, the stress changes rapidly with time with increasing the drop-weight height, the material reacts at 1000μs, the corresponding critical stress is 218 MPa, and the energy absorbed by the unit mass of material during the reaction is 40.9 J/g. The simulation results are in agreement with the experimental ones and further verify the rationality of the Johnson-Cook′s constitutive model of materials.
引文
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[17] 陈进,袁宝慧,梁争峰,等.活性材料能量释放特性实验评估方法 [J].火炸药学报,2015,38(3):49-53.CHEN Jin,YUAN Bao-hui,LIANG Zheng-feng,et al.An experimental evaluation method of energy release characteristics of reactive materials[J].Chinese Journal of Explosives & Propellants(Huozhayao Xuebao),2015,38(3):49-53.
[18] 陈鹏,卢芳云,覃金贵,等.含钨活性材料动态压缩力学性能[J].兵工学报,2015,36(10):1861-1866.CHEN Peng,LU Fang-yun,QIN Jin-gui,et al.Dynamic compressive mechanical properties of tungstenic reactive material[J].Acta Armamentarii,2015,36(10):1861-1866.Reactive Properties of Reactive Material under the Load of Drop-weightCHEN Peng,QU Ke-peng,CHEN Rong,YUAN Bao-huiChinese Journal of Explosives & Propellants,2019,42(2):197-201.Drop-weight was used to investigate the properties of reactive material,the stress—time curves at different drop height and the absorption energy of the unit mass of material during the reaction were studied.
[2] 肖艳文,徐峰悦,郑元枫,等.活性材料弹丸碰撞邮箱引燃效应实验研究[J].北京理工大学学报,2017,37(6):557-561.XIAO Yan-wen,XU Feng-yue,ZHENG Yuan-feng,et al.Experimental study on ignition effects of fuer-filed tank impacted by reactive material projectile[J].Transactions of Beijing Institute of Technology,2017,37(6):557-561.
[3] 何源,何勇,潘绪超,等.含能破片冲击引爆屏蔽炸药研究[J].南京理工大学学报,2011,35(2):187-193.HE Yuan,HE Yong,PAN Xu-chao,et al.Initiation of shielded high explosive impacted by energetic fragment[J].Journal of Nanjing University of Science and Technology,2011,35(2):187-193.
[4] 王海福,郑元枫,余庆波,等.活性破片引爆屏蔽装药机理研究[J].北京理工大学学报,2012,32(8):786-789.WANG Hai-fu,ZHENG Yuan-feng,YU Qing-bo,et al.Study on initiation mechanism of reactive fragment to covered explosive[J].Transactions of Beijing Institute of Technology,2012,32(8):786-789.
[5] 阳世清,徐松林,张彤,等.PTFE/Al反应材料制备工艺及性能[J].国防科技大学学报,2008,30(6):39-44.YANG Shi-qing,XU Song-lin,ZHANG Tong,et al.Preparation and performance of PTFE/Al reactive materials[J].Journal of National University of Defense Technology,2008,30(6):39-44.
[6] Casem D T.Mechanical response of an Al-PTFE composite to uniaxial compression over a range of strain rates and temperatures[R].Maryland:Army Research Laboratory,2008.
[7] 赵鹏铎,卢芳云,李俊玲,等.活性材料PTFE/Al动态压缩性能[J].含能材料,2009,17(4):459-462.ZHAO Peng-duo,LU Fang-yun,LI Jun-ling,et al.The dynamic compressive properties of PTFE/Al reactive materials[J].Chinese Journal of Energetic Materials,2009,17(4):459-462.
[8] Cai J,Walley S,Hunt R,et al.High-strain high-strain-rate flow and failure in PTFE/Al/W granular composites[J].Materials Science and Engineering A,2008,472(1):308-315.
[9] GE Chao,Wubuliaisan Maimaitituersun,DONG Yong-xiang.A study on the mechanical properties and impact-induced initiation characteristics of brittle PTFE/Al/W reactive materials[J].Materials,2017,10(5):1-15.
[10] Addiss J,Cai J,Walley S,et al.High strain and strain-rate behaviour of PTFE/Al/W mixtures [J].Shock Compression of Condensed Matter,2007:773-776.
[11] 卢芳云,陈荣,林玉亮,等.霍普金森杆实验技术[M].北京:科学出版社,2013:31-32.
[12] 李亮亮,沈飞,屈可朋,等.炸药装药在不同应变率响应条件下的安全性研究进展[J].火炸药学报,2016,39(1):14-22.LI Liang-liang,SHEN Fei,QU Ke-peng,et al.Progress of study on tbe safety of explosive cbarge under different strain-rate conditions[J].Chinese Journal of Explosives & Propellants(Huozhayao Xuebao),2016,39(1):14-22.
[13] Xu F,Geng B,Zhang X,et al.Experimental study on behind-plate overpressure effect by reactive material projectile[J].Propellants,Explosives,Pyrotechnics,2017,42:192-197.
[14] Xu F Y,Zheng Y F.Damage effects of aluminum plate by reactive material projectile impact[J].Impact Engineering,2017,104:38-44.
[15] Richard G A.Energy release characteristics of impact-initiated energy materials[J].Materials Research Society,2005,896:123-132.
[16] Wang H F,Zheng Y F,Yu Q B,et al.Impact-induced initiation and energy release behavior of reactive materials[J].Journal of Applied Physics,2011,110:074904.
[17] 陈进,袁宝慧,梁争峰,等.活性材料能量释放特性实验评估方法 [J].火炸药学报,2015,38(3):49-53.CHEN Jin,YUAN Bao-hui,LIANG Zheng-feng,et al.An experimental evaluation method of energy release characteristics of reactive materials[J].Chinese Journal of Explosives & Propellants(Huozhayao Xuebao),2015,38(3):49-53.
[18] 陈鹏,卢芳云,覃金贵,等.含钨活性材料动态压缩力学性能[J].兵工学报,2015,36(10):1861-1866.CHEN Peng,LU Fang-yun,QIN Jin-gui,et al.Dynamic compressive mechanical properties of tungstenic reactive material[J].Acta Armamentarii,2015,36(10):1861-1866.Reactive Properties of Reactive Material under the Load of Drop-weightCHEN Peng,QU Ke-peng,CHEN Rong,YUAN Bao-huiChinese Journal of Explosives & Propellants,2019,42(2):197-201.Drop-weight was used to investigate the properties of reactive material,the stress—time curves at different drop height and the absorption energy of the unit mass of material during the reaction were studied.
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