线起爆膨胀柱壳实验加载及诊断技术

李英雷 刘明涛 陈艳 张世文 汤铁钢

李英雷, 刘明涛, 陈艳, 张世文, 汤铁钢. 线起爆膨胀柱壳实验加载及诊断技术[J]. 爆炸与冲击, 2022, 42(12): 124101. doi: 10.11883/bzycj-2021-0484
引用本文: 李英雷, 刘明涛, 陈艳, 张世文, 汤铁钢. 线起爆膨胀柱壳实验加载及诊断技术[J]. 爆炸与冲击, 2022, 42(12): 124101. doi: 10.11883/bzycj-2021-0484
LI Yinglei, LIU Mingtao, CHEN Yan, ZHANG Shiwen, TANG Tiegang. Technologies for loading and diagnosis of expanding cylinder experiments with linearly-initiated explosives[J]. Explosion And Shock Waves, 2022, 42(12): 124101. doi: 10.11883/bzycj-2021-0484
Citation: LI Yinglei, LIU Mingtao, CHEN Yan, ZHANG Shiwen, TANG Tiegang. Technologies for loading and diagnosis of expanding cylinder experiments with linearly-initiated explosives[J]. Explosion And Shock Waves, 2022, 42(12): 124101. doi: 10.11883/bzycj-2021-0484

线起爆膨胀柱壳实验加载及诊断技术

doi: 10.11883/bzycj-2021-0484
基金项目: 国家自然科学基金(11932018)
详细信息
    作者简介:

    李英雷(1974- ),男,博士,副研究员,ylli@ustc.edu

    通讯作者:

    张世文(1971- ),男,博士,副研究员,zhangswxueshu@163.com

  • 中图分类号: O346.1

Technologies for loading and diagnosis of expanding cylinder experiments with linearly-initiated explosives

  • 摘要: 基于电爆炸丝引爆炸药、继而驱动尼龙对金属柱壳进行碰撞加载的方式,在金属柱壳中部、半柱高范围内实现了一维柱面膨胀加载。同时,基于沿轴向的加载(或径向速度)一致性和沿环向的加载(或径向速度)轴对称性,提出了一维柱面加载的有效性判据。相比于滑移爆轰加载,一维柱面加载方式具有应力状态相对简单、易简化为二维轴对称问题分析的优点。在柱壳断裂诊断方面,建立了分布式表面速度诊断方法来监测柱壳圆周范围内的初始断裂。其原理为:均匀承载壳体断裂引起的局部承载失效将导致均匀速度曲线簇出现分叉(或演化趋势变化)。与高速分幅照相诊断方法相比,分布式表面速度诊断方法可准确获取柱壳圆周范围内的初始断裂信息(含断裂时刻和断裂位置)。利用建立的线起爆膨胀柱壳实验加载和诊断技术,获得了304钢和45钢柱壳的一维柱面动态拉伸初始断裂性能数据(含断裂应变、平均应变率),其中,45钢柱壳的断裂应变(或延展性)低于304钢柱壳的。
  • 图  1  线起爆实验装置

    Figure  1.  The experimental device with linear initiation

    图  2  304钢柱壳外壁的径向速度曲线

    Figure  2.  The radial velocity curves of the outer surface of the 304 steel cylinder

    图  3  45钢柱壳外壁的径向速度曲线

    Figure  3.  The radial velocity curves of the outer surface of the 45 steel cylinder

    图  4  45钢柱壳的高速分幅照相结果

    Figure  4.  The high-speed framing photography results of the 45 steel cylinder

    图  5  304钢柱壳的初始轮廓与运动35 μs后的轮廓

    Figure  5.  The contours of the outer-surface of the 304 steel cylinder at the initial state and the deformed state after 35 μs

    图  6  304钢柱壳沿环向90°方向、不同高度的外壁位移状态

    Figure  6.  The displacement of the outer surface of the 45 steel cylinder at various heights and the circle angle of 90°

    表  1  304钢和45钢柱壳外壁各测点的速度曲线起跳时刻

    Table  1.   Jump-up times in velocity curves of the outside surfaces of the 304 steel and 45 steel cylinders

    柱壳材料t11/μst12/μst13/μst21/μst22/μst23/μst24/μs
    304钢10.2710.1710.0910.2710.2710.1410.25
    45钢12.1311.9711.8712.1312.1112.06
    下载: 导出CSV

    表  2  钢柱壳的初始断裂参数

    Table  2.   Initial fracture parameters of steel cylinders

    材料断裂时刻/μs断裂应变/%平均应变率/s−1
    304钢51370.9×104
    45钢37241.0×104
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-11-18
  • 修回日期:  2022-09-06
  • 网络出版日期:  2022-10-09
  • 刊出日期:  2022-12-08

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