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爆轰加载下金属柱壳膨胀破裂过程研究
引用本文:汤铁钢,谷岩,李庆忠,华劲松,孙学林.爆轰加载下金属柱壳膨胀破裂过程研究[J].爆炸与冲击,2003,23(6):529-533.
作者姓名:汤铁钢  谷岩  李庆忠  华劲松  孙学林
作者单位:中国工程物理研究院流体物理研究所,四川,绵阳,621900
摘    要:采用前照明的高速分幅照相对不同壁厚的45钢柱壳在爆轰加载下的膨胀破裂过程进行了研究,实验成功拍摄到45钢柱壳前表面裂纹生成、扩展及产物泄漏的过程图像。研究表明:膨胀应变率在104s-1附近时,随着应变率的增加,45钢柱壳的各特征应变均有所增加,断裂模式由拉剪混合向单一剪切转变;45钢柱壳的膨胀破裂有一个过程,从柱壳的外壁面可以观察到裂纹生成至产物开始泄漏经历时间历程的长短与柱壳壁厚相关,柱壳壁越厚,从外壁出现裂纹到产物开始泄漏的时间间隔越长;由回收破片厚度测量推算出的膨胀断裂应变与动态实验过程中产物开始泄漏时的断裂应变基本一致。

关 键 词:爆轰加载  金属柱壳  膨胀破裂  分幅照相技术  膨胀应变率  固体力学
文章编号:1001-1455(2003)06-0529-05
修稿时间:2003年1月23日

Expanding fracture of steel cylinder shell by detonation driving
TANG Tie-gangCorresponding author: TANG Tie-gang,GU Yan,LI Qing-zhong,HUA Jin-song,SUN Xue-lin.Expanding fracture of steel cylinder shell by detonation driving[J].Explosion and Shock Waves,2003,23(6):529-533.
Authors:TANG Tie-gangCorresponding author: TANG Tie-gang  GU Yan  LI Qing-zhong  HUA Jin-song  SUN Xue-lin
Abstract:The high-speed photography has been applied to observe the expanding fracture of the steel cylinder shells, drive which by detonation. The clear photos of expanding process of steel cylinder shells have been obtained. The fracture strain of the expanding steel shell becomes larger when the strain rate increase to around 10~(4)s~(-1); and the fracture model becomes to simple shear from tensile-shear. The time between cracks initiating on the out surface of the steel shell and the detonation product getting out gets longer when the thickness is increase. The deduced strain from the average thickness of the recovered fragments agrees with that obtained from dynamic photos.
Keywords:solid mechanics  expanding fracture  high-speed photography  steel cylinder shell
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