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波阻抗梯度材料超高速正/反撞击下防护特性研究

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波阻抗梯度材料超高速正/反撞击下防护特性研究
Study on Performances of Graded-Impedance Materials under Front/Back Side Hypervelocity Impact
投稿时间:2018-12-01
DOI:10.15918/j.tbit1001-0645.2018.s2.017
中文关键词:空间碎片阻抗梯度材料正/反撞击超高速撞击
English Keywords:space debrisgraded-impedance materialsfront/back impacthypervelocity impact
基金项目:国家安全重大基础研究计划(613311)
作者单位
宋光明北京卫星环境工程研究所, 北京 100094
李明中国空间技术研究院, 北京 100094
龚自正北京卫星环境工程研究所, 北京 100094
武强北京卫星环境工程研究所, 北京 100094
张庆明北京理工大学 机电学院, 北京 100081
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中文摘要:
为分析梯度分布对波阻抗梯度材料超高速撞击防护特性的影响,针对梯度分布为钛合金/铝合金/镁合金的波阻抗梯度材料,设计开展了以钛合金为撞击面(正撞击)、镁合金为撞击面(反撞击)的超高速撞击实验与数值模拟研究.研究获得了实验条件下防护结构碎片云特性及后墙损伤特性,并借助数值模拟,深入分析了不同撞击条件下弹靶冲击压力特性、内能转化特性.结果表明,正撞击有利于增大弹靶冲击压力,促进动能向内能的转化,从而提高防护能力.
English Summary:
In order to analyse the effect of gradient distribution on the performances of graded-impedance materials against hypervelocity impact, experiments and numerical simulations with titanium alloy as the impact face (front impact) and magnesium alloy as the impact face (back impact) were designed and carried out for the graded-impedance materials with graded-impedance distribution of titanium alloy/aluminium alloy/magnesium alloy. The characteristics of debris cloud and rear wall damage were obtained. The impact pressure and internal energy conversion characteristics of projectiles and targets under different conditions were analyzed. The results show that front impact is beneficial to increase the impact pressure, promote the transformation of kinetic energy to internal energy, and thus improve the protection ability.
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