冲击载荷下正弦波纹夹芯圆柱壳的轴向压缩和吸能特性

郝孝恒; 张天辉; 王根伟; 沈文豪; 闫栋; 沙风焕

doi:10.11858/gywlxb.20220518

冲击载荷下正弦波纹夹芯圆柱壳的轴向压缩和吸能特性

doi: 10.11858/gywlxb.20220518

郝孝恒^{1, 2,},
张天辉^{1, 2},
王根伟^{1, 3,*, ,},
沈文豪^{1, 2},
闫栋^{1, 2},
沙风焕^{1, 2}

1.
太原理工大学材料强度与结构冲击山西省重点实验室, 山西太原　030024
2.
太原理工大学机械与运载工程学院, 山西太原　030024
3.
太原理工大学航空航天学院, 山西晋中　030600

基金项目: 国家自然科学基金（11872265）；山西省自然科学基金（201901D111087）

详细信息

作者简介:
郝孝恒（1997-），男，硕士研究生，主要从事金属夹芯结构的吸能和变形研究.E-mail：15222578257@163.com

通讯作者:
王根伟（1974－），男，博士，副教授，主要从事冲击动力学研究. E-mail：gwang@tyut.edu.cn

中图分类号: O341; O521.2
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出版历程
- 收稿日期: 2022-02-22
- 修回日期: 2022-03-26
- 网络出版日期: 2022-07-19
- 刊出日期: 2022-07-28

Axial Compression and Energy Absorption of the Sinusoidal Corrugated Cylinder under Impact Loading

HAO Xiaoheng^{1, 2
,},
ZHANG Tianhui^{1, 2},
WANG Genwei^{1, 3,*
, ,},
SHEN Wenhao^{1, 2},
YAN Dong^{1, 2},
SHA Fenghuan^{1, 2}

1.
Shanxi Key Laboratory of Material Strength and Structural Impact, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
2.
College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
3.
College of Aeronautics and Astronautics, Taiyuan University of Technology, Jinzhong 030600, Shanxi, China

摘要

摘要: 薄壁夹芯结构因其优异的吸能和轻量化特性被广泛应用于防护结构中。正弦波纹夹芯圆柱壳的制备工艺简单，在工程上应用广泛，研究其在冲击载荷下的轴向变形行为和吸能特性具有重要意义。基于准静态轴向压缩实验，对正弦形波纹夹芯圆柱壳的轴向准静态压缩进行了有限元模拟，模拟结果与实验结果吻合较好。在此基础上，探讨了夹芯圆柱壳芯层厚度A和正弦波周期数N对冲击载荷作用下夹芯圆柱壳的压溃模式和能量吸收特性的影响。结果表明，合理配置A和N能够有效地提高比吸能，实现较理想的吸能变形模式。在准静态压缩下，结构参数为A3N12的夹芯圆柱壳具有最好的比吸能,为轴对称变形。在冲击载荷作用下，发生非轴对称变形模式的A7N12具有最好的比吸能和最高的平均压缩力效率。
- 夹芯结构 /
- 能量吸收 /
- 正弦波纹圆柱壳 /
- 变形模式 /
- 轴向压缩
Abstract: Thin-walled sandwich structures are commonly used in protective structures due to its lightweight performance and excellent energy absorption. In this investigation, axial deformation behaviors as well as the energy absorption are studied for the sinusoidal corrugated cylinder because of its easier manufacturing process and wider engineering application. Based on the quasi-static axial compression experiment, the corresponding numerical simulation is carried out. The experimental result agrees with the numerical one. Hence, the influence of the core thickness A and the number of sine wave cycles N is analyzed on the collapse mode and energy absorption. The results show that the proper A and N not only effectively improves the specific energy absorption but also leads to desired deformation mode. In addition, compared with other parameters of A and N, in case of A=3 mm and N=12, the sandwich cylinder under quasi-static compression exhibits axisymmetric deformation, which shows the best energy absorption property. A=7 mm and N=12 with non-axisymmetric deformation mode has the best specific energy absorption and highest average compression efficiency under impact loading.
- sandwich structure /
- energy absorption /
- sinusoidal corrugated cylinder /
- deformation mode /
- axial compression

HTML全文

图 1 正弦波纹圆柱结构示意图

Figure 1. Schematic diagram of a sinusoidal corrugated cylinder

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图 2 不同A和N的夹芯圆柱壳

Figure 2. Sandwich cylindrical shells with different A and N

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图 3 Al 6061-O的工程应力-应变曲线

Figure 3. Engineering stress-strain curves of Al 6061-O

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图 4 正弦波纹圆柱壳结构的有限元模型

Figure 4. Finite element model of sinusoidal corrugated cylindrical shells

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图 5 压缩载荷-位移曲线的模拟与实验结果对比

Figure 5. Comparison of compressive force-displacement curves between simulation and experiment

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图 6 网格敏感性分析

Figure 6. Mesh sensitivity analysis

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图 7 动能与应变能的对比

Figure 7. Comparison of kinetic energy and internal energy

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图 8 典型的轴对称、非轴对称和混合变形模式

Figure 8. Representative deformation of axisymmetric, non-axisymmetric and mixed modes

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图 9 不同的A和N下壳体的变形模式

Figure 9. Collapse modes of shells with various A and N

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图 10 不同的A和N下试件的质量

Figure 10. Mass of specimens with different A and N

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图 11 不同的A和N下夹芯圆柱壳能量吸收的模拟结果

Figure 11. Numerical results of the energy absorption of sandwich cylinder shells with different A and N

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图 12 N=4时内外壳和夹芯的比吸能

Figure 12. Specific energy absorption of inner and outer shells and sandwich with N=4

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图 13 不同的A和N下夹芯圆柱壳的比吸能和变形模式

Figure 13. Specific energy absorption and deformation modes of sandwich cylindrical shells with different A and N

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图 14 不同冲击速度下夹芯圆柱壳的变形模式

Figure 14. Deformation patterns of sandwich cylindrical shells impacted at different impact velocities

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表 1 不同冲击速度下结构的能量吸收对比

Table 1. Comparison of energy absorption of structures at different impact velocities

v/(m·s⁻¹)	Structure	SEA/(J·g⁻¹)	PCF/kN	CFE
10	A7N10	36.92	64.59	0.57
	A7N12	38.03	67.93	0.56
	A3N10	28.25	60.69	0.46
	A3N12	30.95	62.57	0.49
20	A7N10	38.31	63.41	0.61
	A7N12	39.74	67.02	0.56
	A3N10	28.27	61.19	0.46
	A3N12	34.82	61.91	0.56
30	A7N10	41.24	69.34	0.59
	A7N12	41.31	70.04	0.58
	A3N10	32.15	67.16	0.48
	A3N12	37.46	75.01	0.50

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