CHINESE JOURNAL OF ENERGETIC MATERIALS
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落锤冲击加载下炸药基体内不同粒度AP颗粒破碎特征
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(西安近代化学研究所, 陕西 西安 710065)

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孙培培(1984-),女,工程师,主要从事军用混合炸药相关研究工作。e-mail: 269619821@qq.com

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Fracture Feature of AP Grains with Different Sizes within Explosive Substrate under Drop Hammer Impact Loading
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(Xi′an Modern Chemistry Research Institute, Xi′an 710065, China)

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    摘要:

    为研究炸药基体内不同粒度高氯酸铵(AP)颗粒在落锤冲击加载下的破碎特征, 用中粒径为6 ~8, 130, 300 μm的AP制备了三种AP/HTPB样品, 用落锤冲击加载损毁样品。回收冲击试验后样品, 用扫描电镜(SEM)研究AP颗粒的破碎特征。分析炸药基体内不同粒度AP颗粒在落锤冲击加载下的破碎特征。结果表明, 冲击加载后, 三种样品内的AP颗粒均发生脆性破裂, 部分晶体上清晰可见剪切带现象, 且粒度越大颗粒破碎越严重。破碎后AP颗粒尺寸均在10~100 μm, 最小颗粒小于10 μm。结合材料剪切理论、AP颗粒破碎特征和破碎尺度, 可推断:在落锤冲击下AP颗粒由于样品内部的剪切作用发生脆性断裂, 且AP颗粒破碎尺度特征与材料剪切现象中的剪切带尺寸特征相类似。

    Abstract:

    To investigate the fracture characteristics of ammonium perchlorate (AP) grains with different sizes within explosive substrate, three kinds of AP/HTPB samples were prepared using three kinds of AP grains with intermediate diameter of 6-8 μm, 30 μm and 300 μm. The samples were damaged by drop hammer impact loading. The samples after impact test were reclaimed and the fracture feature of AP grains was studied using scanning electron microscope (SEM).The fracture characteristics of AP grains with different sizes within explosive substrate under drop hammer impact loading were analyzed. Results show that after impact loading, lots of brittle ruptures of AP grains in three kinds of samples occurr, the shear bands can be seen in some samples, and the bigger the particles, the worse the fracture. The sizes of AP grains after fracture are between 10-100 μm, and the minimum size is less than 10 μm. Combined the shear band theory, the AP rupture characteristic and the rupture size of AP, ones can deduce that under drop hammer impact loading, the brittle ruptures of AP grains take place because of the shear effect of the sample inside, and the fracture size feature of the AP grains is similar to that of the shear bands in shear phenomena of materials.

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引用本文

孙培培,王晓峰,南海,等.落锤冲击加载下炸药基体内不同粒度AP颗粒破碎特征[J].含能材料, 2015, 23(1):53-56. DOI:10.11943/j. issn.1006-9941.2015.01.011.
SUN Pei-pei, WANG Xiao-feng, NAN Hai, et al. Fracture Feature of AP Grains with Different Sizes within Explosive Substrate under Drop Hammer Impact Loading[J]. Chinese Journal of Energetic Materials, 2015, 23(1):53-56. DOI:10.11943/j. issn.1006-9941.2015.01.011.

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历史
  • 收稿日期: 2013-06-25
  • 最后修改日期: 2014-04-24
  • 录用日期: 2014-05-20
  • 在线发布日期: 2015-01-20
  • 出版日期: 2015-01-20