冰雹撞击下泡沫铝夹芯板的动态响应

张永康; 李玉龙; 汤忠斌; 杨洪; 许海

doi:10.11883/bzycj-2016-0232

冰雹撞击下泡沫铝夹芯板的动态响应

doi: 10.11883/bzycj-2016-0232

1.
苏州市职业大学机电工程学院，江苏苏州 215104
2.
西北工业大学航空学院，陕西西安 710072

基金项目:

国家自然科学基金项目 11372206

详细信息

作者简介:
张永康(1977—)，男，博士，副教授, npuzhangyk1@163.com

中图分类号: O344.4;V214.1
计量
- 文章访问数: 5951
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- 被引次数: 0
出版历程
- 收稿日期: 2016-08-16
- 修回日期: 2016-12-19
- 刊出日期: 2018-03-25

Dynamic response of aluminum-foam-based sandwich panelsunder hailstone impact

1.
School of Mechanical and Electrical Engineering, Suzhou Vocational University, Suzhou 215104, Jiangsu, China
2.
School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, China

摘要

摘要: 在传统单层泡沫夹芯结构的上、下面板之间插入中面板，通过移动中面板的位置，获得了外形尺寸相同、质量相等的5种构型夹芯结构，其上层芯材与芯材总厚度比分别为0:30、10:30、15:30、20:30和30:30。在量纲分析的基础上，应用非线性动力有限元程序LS-DYNA对5种构型夹芯结构进行了冰雹撞击数值分析，研究了中面板位置对夹芯板的能量吸收、能量耗散和动态响应的影响。结果表明：中面板的存在对下层芯材能形成有效的保护；随着中面板位置由上向下移动，夹芯板的抗撞击性能呈现由大到小再增大的态势。数值计算结果对抗冰雹撞击夹芯结构的优化设计具有一定的参考价值。
- 泡沫铝夹芯板 /
- 冰雹 /
- 撞击 /
- 量纲分析 /
- LS-DYNA
Abstract: In this work, by inserting an additional sheet, called the middle sheet, between the upper and lower sheets of a traditional single-layer foam core sandwich panel consisting of a core with bonded with two sheets on either side, we fabricated sandwich panels with five structures that have the same dimensions and weights by changing the position of the middle sheet. The ratios of the upper core thickness to the total core thickness are 0:30, 10:30, 15:30, 20:30 and 30:30, respectively. On the basis of dimensional analysis, we conducted numerical analysis of the sandwich panels subjected to hailstone impact using the nonlinear finite element program LS-DYNA, and investigated the influence of the middle sheet's position on the energy absorption, energy dissipation and dynamic response of the sandwich panel. The numerical results show that the middle sheet provides an effective protection for the lower core, and the anti-impact performance of the sandwich panel exhibited a tendency to change from strong to weak and then from weak to strong as the middle sheet moved along the direction of the hailstone impact. The results of the numerical simulation offer a reference for the optimization design of the sandwich structures under hailstone impact.
- aluminum-foam-based sandwich panel /
- hailstone /
- impact /
- dimensional analysis /
- LS-DYNA

HTML全文

图 1 冰雹撞击泡沫铝夹芯板分析模型

Figure 1. Analytic model of sandwich panelimpacted by hailstone

下载: 全尺寸图片幻灯片

图 2 冰雹撞击泡沫铝夹芯板有限元模型

Figure 2. Finite element model of sandwichpanel impacted by hailstone

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图 3 2014-T4铝合金平板

Figure 3. 2014-T4 aluminum platefor experiment

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图 4 2014-T4铝合金的应力应变曲线^[15]

Figure 4. Stress-strain curve of 2014-T4^[15]

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图 5 数值模拟结果和实验结果的比较

Figure 5. Comparison between numerical and experimental results

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图 6 泡沫铝芯材的应力应变曲线^[3]

Figure 6. Stress-strain curve of aluminum foam^[3]

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图 7 冰雹撞击过程(v=200 m/s, H₁:H=15:30)

Figure 7. Impact process of hailstone

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图 8 夹芯结构各部分吸能情况(H₁:H=0:30)

Figure 8. Energy absorption of sandwich panel

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图 9 夹芯结构各部分吸能情况(H₁:H=15:30)

Figure 9. Energy absorption of sandwich panel

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图 10 上面板受损破坏图(H₁:H=15:30)

Figure 10. Images of upper sheets' damage

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图 11 下面板中心点的位移

Figure 11. Displacement of central pointof lower sheets

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图 12 下面板中心点的位移幅值随中间面板位置的变化

Figure 12. Displacement amplitude of central point oflower sheet versus position of middle sheet

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表 1 夹芯结构在不同撞击速度下的吸能情况

Table 1. Energy absorption of sandwich panels at different impact velocities

H₁:H	撞击速度/ (m·s^-1)	面板吸能/J			芯材比吸能/(J·kg^-1)
H₁:H	撞击速度/ (m·s^-1)	上	中	下	上层	下层
10:30	80	5.620	0.203	0.074	99.322	29.965
	120	31.138	2.920	0.407	340.229	109.739
	160	52.602	36.984	5.530	728.125	247.094
	200	58.859	65.632	58.394	1 091.181	497.509
20:30	80	5.561	0.114	0.078	62.981	29.444
	120	31.630	1.111	0.757	236.621	90.341
	160	50.551	16.434	17.913	582.899	186.569
	200	57.139	85.902	48.619	931.456	365.222
30:30	80	6.540	-	0.056	47.779
	120	35.296	-	0.179	175.520
	160	51.697	-	2.980	508.573
	200	60.143	-	18.799	934.173

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