爆炸冲击作用下铝蜂窝板失稳研究

杨森; 冯凇; 王顺尧; 何中其

doi:10.11858/gywlxb.2017.02.013

爆炸冲击作用下铝蜂窝板失稳研究

doi: 10.11858/gywlxb.2017.02.013

南京理工大学化工学院, 江苏南京 210094

详细信息

作者简介:
杨森(1987—), 男, 硕士研究生, 主要从事爆炸安全防护研究. E-mail: 15312761595@163.com

通讯作者:
何中其(1978—), 男, 讲师, 主要从事爆炸作用及应用、安全技术工程研究. E-mail: hzq555@163.com

中图分类号: O347.5
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出版历程
- 收稿日期: 2016-03-23
- 修回日期: 2016-06-04

Instability of Aluminum Honeycomb Sandwich Panelunder Blast Loading

School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

摘要

摘要: 基于非线性动力学软件AUTODYN，对铝蜂窝夹芯板在爆炸冲击载荷作用下的失稳过程进行三维数值模拟。通过建立不同参数规格的铝蜂窝夹芯板的实体模型，研究其前、后面板在TNT爆炸冲击作用下的动态响应及塑性阶段的失稳变形。计算结果表明：随着铝蜂窝板前、后面板厚度，夹芯层铝箔高度和厚度的增加，铝蜂窝板在爆炸冲击载荷下的最终残余变形量均明显减小，抵抗变形的能力增强；对于夹芯层胞元形状不同但相对密度相同的铝蜂窝板，因冲击载荷下单轴压缩“惯性效应”差异较小，其面板在爆炸载荷作用下的最终残余变形量差异不大。
- 爆炸力学 /
- 安全防护 /
- 失稳 /
- AUTODYN /
- 铝蜂窝夹芯板
Abstract: In the present work, based on the nonlinear dynamics software AUTODYN, we performed a three-dimensional simulation of the instability process of the aluminum honeycomb sandwich panels under blast loading.By establishing the solid model of aluminum honeycomb sandwich panels with different parameters, we studied the dynamic response of the front and back sheets under the TNT impact and the instability deformation in the plastic stage.The results achieved from our calculation show that with the increase of the thickness of the aluminum honeycomb panel, the height and thickness of the aluminum foil, the final residual deformation of the aluminum honeycomb panel under blast loading is obviously reduced and its deformation-resistance ability is enhanced.For the aluminum honeycomb panels with different cell shapes but the same relative density, the distinction of the panels' final residual deformation under blast loading is not significant because there is little difference in "inertia effect" under the uniaxial compression condition.
- mechanics of explosion /
- safety protection /
- instability /
- AUTODYN /
- aluminum honeycomb sandwich panel

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图 1 后面板最终形变量-载荷冲量曲线的实验和模拟结果

Figure 1. Experiment and simulation results of permanent deformation-impulse curves of back sheet

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图 2 铝蜂窝板结构

Figure 2. Structure of aluminum honeycomb

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图 3 机车铝蜂窝夹芯板

Figure 3. Locomotive with honeycomb sandwich panel

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图 4 模型与网格

Figure 4. Model and grid

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图 5 爆炸冲击下铝蜂窝压溃变形过程

Figure 5. Compression deformation of aluminum honeycomb under blast loading

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图 6 前、后面板中心位置的速度以及变形量

Figure 6. Velocities and displacements at center of front and back sheets

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图 7 测量点1~6处前、后面板的应变随时间变化

Figure 7. Face strain-time histories of gauge 1-6

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图 8 面板最大残余变形量

Figure 8. Maximum residual deflection of front and back sheets

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图 9 不同胞元形状铝蜂窝面板的最终变形量

Figure 9. Residual deflection of aluminum honeycomb panel with different cell shapes

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表 1 铝蜂窝板材料参数

Table 1. Material parameters of aluminum honeycomb panel

Material	Elastic modulus/(GPa)	Shear modulus/(GPa)	Poisson ratio	Yield strength/(MPa)	Failure strain
Al-2024	72.4	28	0.3	75	0.1

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表 2 TNT炸药的材料参数

Table 2. Material parameters of TNT explosive

ρ_TNT/(g/cm³)	A/(GPa)	B/(GPa)	R₁	R₂	ω	v_C-J/(km/s)	E_C-J/(GJ/m³)	p_C-J/(GPa)
1.63	373.77	3.75	4.15	0.90	0.35	6.93	6	21

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表 3 空气参数

Table 3. Material parameters of air

ρ_g/(kg/m³)	e_g/(kJ/g)	γ
1.225	206.8	1.4

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表 4 Al-5083H116本构方程参数

Table 4. Constitutive equation parameters of Al-5083H116

ρ_Al/(g/cm³)	ν_Al	A_m/(MPa)	B_m/(MPa)	n	C_m	T_m/(K)	ε_f
2.7	0.3	290	596	0.551	0.001	893	0.1

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表 5 铝蜂窝板材料参数

Table 5. Material parameters of aluminum honeycomb panel

Material	H_f/(mm)	H_b/(mm)	H_c/(mm)	h/(mm)	a/(mm)	ρ
Al5083	2	2	16.5	0.05	6	0.022

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表 6 不同胞元铝蜂窝板参数

Table 6. Parameters of aluminum honeycomb panel with different cell shapes

Test No.	Cell shapes	H_c/(mm)	h/(mm)	a/(mm)	ρ
1	Hexagon	16.5	0.20	6	0.089
2	Diamond	16.5	0.27	6	0.090
3	Rectangle	16.5	0.27	6	0.090
4	Triangle	16.5	0.15	6	0.087

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