超高速碎片云撞击下薄板变形与撕裂建模研究

刘泽荣; 龙仁荣; 张庆明; 陈利

doi:10.11858/gywlxb.20210811

超高速碎片云撞击下薄板变形与撕裂建模研究

doi: 10.11858/gywlxb.20210811

北京理工大学爆炸科学与技术国家重点实验室，北京　100081

基金项目: 国防科工局“十三五”碎片专项（KJSP2016030301）；国防科工局民用航天技术预研项目（D020304）

详细信息

作者简介:
刘泽荣（1995－），男，硕士研究生，主要从事冲击动力学研究. E-mail：rongzixu@126.com

通讯作者:
龙仁荣（1982－），男，博士，副教授，主要从事冲击动力学研究. E-mail：longrenrong@bit.edu.cn

中图分类号: O347; V423.42
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出版历程
- 收稿日期: 2021-06-11
- 修回日期: 2021-06-29

Theoretical Study of Deflecting and Petalling of Thin Plate under Debris Cloud Loading Induced by Hypervelocity Impact

State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China

摘要

摘要: 为研究多层板结构中薄板在碎片云作用下的变形与破坏问题，开展了超高速撞击多层板实验。实验结果表明，薄板在高速碎片云冲击下的典型破坏特征为中央穿孔及环孔凹陷变形与花瓣型撕裂。在此基础上，考虑弯矩和膜力作用，建立了描述薄板在轴对称分布强冲击载荷作用下大变形的理想刚塑性环板模型，据此可以计算环板变形过程的横向与径向速度场，结合Grady破碎理论，可以计算花瓣型撕裂的花瓣数，理论计算值与实验比较吻合。研究结果可以为多层板结构在超高速弹丸撞击下的毁伤评估提供理论基础。
- 超高速撞击 /
- 碎片云 /
- 环板动态变形 /
- 花瓣型撕裂
Abstract: In order to study the deformation and failure of the thin plate under impact of debris cloud in the multi-layer structure, a series of hypervelocity impact experiments on multi-layer structure are carried out. The experimental results showed that typical failure characteristics of the thin plate under impact of the high-speed debris cloud are central perforation, deflection and petalling. Considering the effect of bending moment and membrane force, an ideal rigid-plastic annular plate deflecting model is established, which can be used to describe large deflection of a thin plate under the strong axisymmetric impact load. The transverse and radial velocity fields of the thin plate under the strong axisymmetric impact load can also be calculated by the established ideal rigid-plastic annular plate deflecting model. With the Grady fragmentation theory, the number of petals can be calculated. The theoretical calculation result is consistent with the experiment. The research results can provide a basic theory for the damage assessment of the multilayer structure under the impact of hypervelocity projectiles.
- hypervelocity impact /
- debris cloud /
- dynamic deflection of annular plate /
- petalling

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图 1 弹丸超高速碰撞多层板结构

Figure 1. Multi-shock shield structure subjected to hypervelocity impact

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图 2 高速冲击后各层板的破坏照片

Figure 2. Damage results of each layer after hypervelocity impact

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图 3 环板变形侧视图

Figure 3. Lateral schematic of annular plate deformation

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图 4 Tresca屈服条件与正交法则

Figure 4. Tresca condition and flow rule

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图 5 环板变形俯视图

Figure 5. Top schematic of annular plate deformation

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图 6 挠度与径向关系示意图

Figure 6. Schematic of relationship between deflection and radial displacement

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图 7 冲量载荷下环板变形示意图

Figure 7. Deflection of annular plate subjected to impulse loading

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图 8 冲量面密度载荷分布曲线

Figure 8. Distribution of the impulse per area

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图 9 环板内环边径向速度与挠度的关系

Figure 9. Relationship between inner edge radial velocity and deflection

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