爆炸载荷下分层梯度泡沫铝夹芯板的失效模式与抗冲击性能

苏兴亚; 敬霖; 赵隆茂

doi:10.11883/bzycj-2018-0198

爆炸载荷下分层梯度泡沫铝夹芯板的失效模式与抗冲击性能

doi: 10.11883/bzycj-2018-0198

苏兴亚^1,,
敬霖^1, ,,
赵隆茂²

1.
西南交通大学牵引动力国家重点实验室，四川成都，610031
2.
太原理工大学应用力学研究所，山西太原，030024

基金项目: 国家自然科学基金（11402216）

详细信息

作者简介:
苏兴亚（1991－　），男，硕士研究生，su_swjt@163.com

通讯作者:
敬　霖（1984－　），男，博士，副研究员，博导，jinglin@home.swjtu.edu.cn

中图分类号: O347.3
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- 被引次数: 0
出版历程
- 收稿日期: 2018-06-05
- 修回日期: 2019-02-22
- 网络出版日期: 2019-05-25
- 刊出日期: 2019-06-01

Failure modes and shock resistance of sandwich panels with layered-gradient aluminum foam cores under air-blast loading

SU Xingya^1
,,
JING Lin^{1
, ,},
ZHAO Longmao²

1.
State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
2.
Institute of Applied Mechanics, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China

摘要

摘要: 采用弹道冲击摆系统开展了爆炸载荷下分层梯度泡沫铝夹芯板的变形/失效模式和抗冲击性能实验研究，并配合激光位移传感器得到试件后面板中心点的挠度-时程响应曲线。研究了炸药当量和芯层组合方式对夹芯板试件变形/失效模式和抗冲击性能的影响。实验结果表明，泡沫铝夹芯板的变形/失效模式主要表现为面板的非弹性大变形，芯层压缩变形、芯层拉伸断裂以及芯层剪切失效。在研究爆炸冲量范围内，非梯度芯层夹芯板的抗冲击性能明显优越于所有分层梯度芯层夹芯板。对于分层梯度夹芯板试件，爆炸冲量较小时芯层组合形式对分层梯度芯层夹芯板的抗冲击性能的影响不大，而爆炸冲量较大时，最大相对密度芯层靠近前面板组合形式的分层梯度夹芯板试件抗冲击性能较好。研究结果可为泡沫金属夹芯结构的优化设计提供参考。
- 夹芯板 /
- 爆炸载荷 /
- 芯层组合方式 /
- 变形/失效模式 /
- 抗冲击性能
Abstract: In this work we investigated the deformation/failure modes and shock resistance performance of sandwich panels with layered-gradient aluminum foam cores under air-blast loading by experiment using a ballistic pendulum device, the deflection-time history curves in the central point of the back face-sheet were measured using a laser displacement sensor, and examined the influences of the charge mass and core-layer arrangement on the failure modes and the shock resistance of the specimens. The results showed that the sandwich panel specimens failed due to the large inelastic deformation of the face-sheets, the core compression, the tensile fracture and the shear failure of the core. The shock resistance performance of the ungraded sandwich panels was found to be superior to all the graded core sandwich configurations. For the sandwich panels with layered-gradient cores, the improvement of the core-layer arrangement on the shock resistance of the specimens was not obvious under small blast impulse, while that of the graded specimens containing the top core-layer with the largest relative density demonstrated a remarkably greater shock resistance. These findings can serve as guidance in the optimal design of metallic foam core sandwich structures.
- sandwich panel /
- blast loading /
- core configurations /
- deformation/failure modes /
- shock resistance

HTML全文

图 1 梯度泡沫铝夹芯板装配示意图（单位：mm）

Figure 1. Assembled diagram of sandwich panel with layered-gradient aluminum foam cores (unit: mm)

下载: 全尺寸图片幻灯片

图 2 不同相对密度泡沫铝在准静态下的压缩应力应变曲线

Figure 2. Quasi-static compressive stress-strain curves of aluminum foams with three different relative densities

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图 3 爆炸试验装置图

Figure 3. Experimental devices

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图 4 实验记录的弹道冲击摆位移-时间曲线

Figure 4. Typical displacement-time curvesof the impact pendulum in tests

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图 5 梯度和非梯度夹芯板承载区域的局部压缩失效

Figure 5. Local compression deformation in central area of sandwich panels with layered-gradient and ungraded cores

下载: 全尺寸图片幻灯片

图 6 爆炸加载下夹芯板的变形/失效示意图

Figure 6. Illustration of sandwich panelsunder blast loadings

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图 7 不同类型夹芯板试件的失效模式

Figure 7. Failure modes of different types of sandwich panels

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图 8 实验记录的后面板挠度的时程曲线

Figure 8. Typical displacement-time curves of the mid-span of sandwich panel

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图 9 不同组合方式的夹芯板在不同爆炸冲量下的后面板挠度

Figure 9. Mid-span deflection of different types of sandwich panels under different blast loadings

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图 10 相同炸药量下不同组合方式夹芯板的后面板挠度随位置变化情况

Figure 10. Typical center cross-sectional deformation profiles of the bottom face-sheet under the same blast loadings

下载: 全尺寸图片幻灯片

图 11 不同炸药量下分层梯度夹芯板和非梯度夹芯板后面板挠度随位置变化情况

Figure 11. Typical center cross-sectional deformation profiles of the bottom face-sheet of layered-gradient sandwich panels and ungraded sandwich panels under different blast loadings

下载: 全尺寸图片幻灯片

表 1 梯度泡沫铝夹芯板芯层的组合方式

Table 1. Configurations for sandwichpanel’s different cores

编号	上芯层相对密度	中间芯层相对密度	下芯层相对密度
G1	0.11	0.16	0.21
G2	0.11	0.21	0.16
G3	0.16	0.11	0.21
G4	0.16	0.21	0.11
G5	0.21	0.11	0.16
G6	0.21	0.16	0.11
U	0.16

下载: 导出CSV

表 2 三种炸药当量下的爆炸冲量值

Table 2. Impulse’s values at three differentexplosive masses

炸药当量/g	I /（N·s）	I₁ /（N·s）	I₂ /（N·s）	I₁/I
30	23.82	17.51	6.31	73.5%
40	34.58	23.16	11.42	67.0%
50	41.13	27.83	13.30	67.7%

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表 3 不同芯层组合方式的夹芯板参数拟合结果

Table 3. Fitted results of sandwich plate parametersk and b for different types

编号	k /（mm·(N·s)⁻¹）	b /mm	R²
G1	1.68	−5.16	0.964
G2	1.56	−3.42	0.940
G3	1.99	−12.75	0.997
G4	1.78	−12.25	0.998
G5	1.29	−0.47	0.944
G6	1.45	−3.17	0.976
U	1.43	−10.28	0.960

下载: 导出CSV

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