X型点阵夹芯结构受局部冲击时动态力学性能试验与数值模拟

程树良; 吴灵杰; 孙帅; 杨硕; 辛亚军

doi:10.13801/j.cnki.fhclxb.20210903.005

X型点阵夹芯结构受局部冲击时动态力学性能试验与数值模拟

doi: 10.13801/j.cnki.fhclxb.20210903.005

1.
燕山大学　河北省重型装备与大型结构力学可靠性重点实验室，秦皇岛 066004
2.
燕山大学　河北省土木工程绿色建造与智能运维重点实验室，秦皇岛 066004

基金项目: 国家自然科学基金 (61690222)；燕山大学博士基金项目 (BL17027)

详细信息

通讯作者:
辛亚军，博士，副教授，硕士生导师，研究方向为多孔功能性材料　 E-mail: xinyajun@ysu.edu.cn

中图分类号: TB383
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出版历程
- 收稿日期: 2021-06-02
- 修回日期: 2021-08-15
- 录用日期: 2021-08-16
- 网络出版日期: 2021-09-03
- 刊出日期: 2022-07-30

Experiment and numerical simulation of dynamic mechanical properties of X-lattice sandwich structure under local impact

1.
Key Laboratory of Mechanical Reliability for Heavy Equipment and Large Structure of Hebei Province, Yanshan University, Qinhuangdao 066004, China
2.
Key Laboratory of Green Construction and Intelligent Maintenance for Civil Engineering of Hebei Province, Yanshan University, Qinhuangdao 066004, China

摘要

摘要: 利用落锤冲击试验研究了X型点阵夹芯结构局部冲击动态特性，并分析了不同参数对其冲击性能的影响。结果表明，冲击失效过程大致经历整体受力、上面板破坏、下面板受力强化和下面板破坏四个典型阶段，冲击速度和面板厚度对X型点阵夹芯结构的冲击极限荷载和吸能量影响较大，芯子厚度对X型点阵夹芯结构的冲击极限荷载和吸能量影响较小，而芯子角度对X型点阵夹芯结构的冲击极限荷载和吸能量有一定影响。利用有限元对X型点阵夹芯结构的局部冲击动态行为进行了数值模拟，通过破坏形态和荷载-时间曲线的对比分析验证了有限元模型的可靠性。
- X点阵结构 /
- 夹芯结构 /
- 局部冲击 /
- 动态性能 /
- 数值模拟
Abstract: The local impact dynamic characteristics of X-type lattice sandwich structure were studied by using the drop weight impact test, and the effects of different parameters on the impact performance were analyzed. The results show that the impact failure process roughly goes through four typical stages: The overall bearing force stage, the upper panel failure stage, the lower panel stress strengthening stage and the lower panel failure stage. The impact velocity and panel thickness have great effects on the impact peak load and energy absorption of the X-type lattice sandwich structure. The core thickness has little effect on the impact peak load and energy absorption of X-shaped lattice sandwich structure, while the core angle has a certain effect on the impact peak load and energy absorption of X-shaped lattice sandwich structure. The local impact dynamic behavior of the X-type lattice sandwich structure was numerically simulated by finite element method. The reliability of the finite element model was verified by the comparative analysis of failure modes and force-time curves.
- X lattice structure /
- sandwich structure /
- local impact /
- dynamic performance /
- numerical simulation

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图 1 X型点阵夹芯结构的示意图及试件

Figure 1. Schematic diagram and specimen of X-type lattice sandwich structure

W—Wide of the specimen; L—Length of the specimen; H—Height of core layer; δ—Thickness of surface layer; t—Core rod section; θ—Core rod angle

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图 2 落锤冲击实验系统

Figure 2. Dropping hammer impact experimental system

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图 3 不同冲击速度下X型点阵夹芯结构的破坏形态

Figure 3. Failure modes of X-type lattice sandwich plates at different impact velocities

A1—Impact velocity 2.5 m/s; A2—Impact velocity 3.5 m/s; A3—Impact velocity 4.5 m/s

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图 4 不同冲击速度下的X型点阵夹芯结构荷载-位移曲线(a)和吸能量-时间曲线(b)对比

Figure 4. Comparison of force-displacement curves (a) and energy absorption-time curves (b) of X-type lattice sandwich plates at different impact velocities

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图 5 不同冲击速度下的X型点阵夹芯结构极限荷载(a)和最大吸能量(b)对比

Figure 5. Comparison of peak force (a) and maximum energy absorption (b) of X-type lattice sandwich plates under different impact velocities

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图 6 不同面板厚度X型点阵夹芯结构的破坏形态

Figure 6. Failure modes of X-type lattice sandwich panels with different panel thicknesses

B1—Panel thickness 0.8 mm; B2—Panel thickness 1.0 mm; B3—Panel thickness1.2 mm

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图 7 不同面板厚度的X型点阵夹芯结构荷载-时间曲线(a)和吸能量-时间曲线(b)对比

Figure 7. Comparison of force-time curves (a) and energy absorption-time curves (b) of of X-type lattice sandwich panels with different panel thicknesses

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图 8 不同面板厚度的X型点阵夹芯结构极限荷载(a)和最大吸能量(b)对比

Figure 8. Comparison of peak force (a) and maximum energy absorption (b) of X-type lattice sandwich panels with different panel thicknesses

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图 9 不同芯子厚度X型点阵夹芯结构的破坏形态

Figure 9. Failure modes of X-type lattice sandwich plates with different core thicknesses

C1—Core thickness 15 mm; C2—Core thickness 20 mm; C3—Core thickness 25 mm

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图 10 不同芯子厚度的X型点阵夹芯结构荷载-时间曲线(a)和吸能量-时间曲线(b)对比

Figure 10. Comparison of force-time curves (a) and energy absorption-time curves (b) of X-type lattice sandwich plates with different core thicknesses

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图 11 不同芯子厚度的X型点阵夹芯结构极限荷载(a)和最大吸能量(b)对比

Figure 11. Comparison of peak force (a) and maximum energy absorption (b) of X-type lattice sandwich plates with different core thicknesses

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图 12 不同芯子角度X型点阵夹芯结构的破坏形态

Figure 12. Failure modes of X-type lattice sandwich plates with different core angles

D1—Core angles 30°; D2—Core angles 45°; D3—Core angles 60°

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图 13 不同芯子角度的荷载-时间曲线(a)和吸能量-时间曲线(b)对比

Figure 13. Comparison of force-time curves (a) and energy absorption-time curves (b) of X-type lattice sandwich plates with different core angles

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图 14 不同芯子角度的X型点阵夹芯结构极限荷载(a)和最大吸能量(b)对比

Figure 14. Comparison of peak force (a) and maximum energy absorption (b) of X-type lattice sandwich plates at different core angles

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图 15 X型点阵夹芯结构冲击有限元模型

Figure 15. Finite element model of X-type lattice sandwich plate under impact

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图 16 三种速度下X型点阵夹芯结构冲击数值模拟和试验最终破坏形态对比

Figure 16. Comparison of final failure modes between numerical simulation and test of X-type lattice sandwich plate at three impact speeds

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图 17 A3组X型点阵夹芯结构模拟和试验下的荷载-位移曲线

Figure 17. Force-displacement curves of A3 group X-type lattice sandwich panels under simulation and experiment

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图 18 X型点阵夹芯结构冲击试验与模拟荷载-时间曲线对比和吸能量-时间曲线对比

Figure 18. Force-time curve comparison and energy absorption-time curve comparison of X-type lattice sandwich plate under impact between test and simulation

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表 1 X型点阵夹芯结构试件参数

Table 1. Specimen parameters of X-type lattice sandwich structure

Specimen label	Core thickness H/mm	Impact velocity V/(m∙s⁻¹)	Core angle θ/(°)	Panel thickness δ/mm
A1	15	2.5	45	1.0+1.0
A2	15	3.5	45	1.0+1.0
A3	15	4.5	45	1.0+1.0
B1	15	4.5	45	0.8+0.8
B2	15	4.5	45	1.0+1.0
B3	15	4.5	45	1.2+1.2
C1	15	4.5	45	1.0+1.0
C2	20	4.5	45	1.0+1.0
C3	25	4.5	45	1.0+1.0
D1	15	4.5	30	1.0+1.0
D2	15	4.5	45	1.0+1.0
D3	15	4.5	60	1.0+1.0

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表 2 X型点阵夹芯结构各部分的材料参数

Table 2. Material parameters of each part of X-type lattice sandwich plate

	Core	Panel	Impactor
Density/(kg·m⁻³)	2680	2700	$4.05 \times {10^6}$
Young’s modulus/GPa	69.4	72.5	200
Poisson’s ratio	0.28	0.33	0.3
Yield strength/MPa	173	153	−

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