蒋东, 黄瑞源, 余道建, 周刚. 侵彻试验尺度效应和相似准则[J]. 力学与实践, 2017, 39(6): 561-565. DOI: 10.6052/1000-0879-17-081
引用本文: 蒋东, 黄瑞源, 余道建, 周刚. 侵彻试验尺度效应和相似准则[J]. 力学与实践, 2017, 39(6): 561-565. DOI: 10.6052/1000-0879-17-081
JIANG Dong, HUANG Ruiyuany, YU Daojian, ZHOU Gang. SIMILARITY LAWS AND SCALING OF PENETRATION TESTS[J]. MECHANICS IN ENGINEERING, 2017, 39(6): 561-565. DOI: 10.6052/1000-0879-17-081
Citation: JIANG Dong, HUANG Ruiyuany, YU Daojian, ZHOU Gang. SIMILARITY LAWS AND SCALING OF PENETRATION TESTS[J]. MECHANICS IN ENGINEERING, 2017, 39(6): 561-565. DOI: 10.6052/1000-0879-17-081

侵彻试验尺度效应和相似准则

SIMILARITY LAWS AND SCALING OF PENETRATION TESTS

  • 摘要: 利用球形空腔膨胀理论的响应函数对靶板在弹体撞击下的侵彻进行分析,并基于量纲理论建立了侵彻相似律的一般形式.通过对侵彻混凝土靶的已有实验数据进行分析,得到了不同缩比因子下,无量纲侵彻深度曲线随侵彻速度不同而发生偏转和偏移.考虑到材料的应变率效应和损伤演化,认为几何相似律对混凝土等脆性材料在抗侵彻时不成立,有必要引入材料应变率效应和损伤演化对几何相似律的修正.

     

    Abstract: In this paper, the response of the spherical cavity expansion theory is used to analyze the penetration of the target under the impact of the missile, and a general form of the penetration similarity is established based on the dimension theory. The analysis of the existing experimental data of the projectile shows that the non-dimensional penetration depth curve is deflected and shifted for difierent penetration speeds. With the strain-rate efiect and the damage evolution of the material, the geometric similarity laws do not hold true for the brittle materials such as the concretes. It is necessary to introduce a correction of the geometric similarity law to account for the strain-rate efiect and the damage evolution of the material.

     

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