梯度双材料负泊松比蜂窝夹芯板局部冲击失效研究

肖俊华; 万武举; 郭之熙; 梁希

梯度双材料负泊松比蜂窝夹芯板局部冲击失效研究

肖俊华^{1, 2, ,},
万武举^{1, 2},
郭之熙³,
梁希^{1, 2}

1.
燕山大学　工程力学系, 秦皇岛 066004
2.
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
3.
河海大学　工程力学系, 南京 211100

基金项目: 中央引导地方科技发展资金项目(236Z1009G)

详细信息

通讯作者:
肖俊华，教授，博士，研究方向为复合材料力学和力学超材料　E-mail: xiaojunhua@ysu.edu.cn

中图分类号: O342; TB383
计量
- 文章访问数: 20
- HTML全文浏览量: 13
- 被引次数: 0
出版历程
- 收稿日期: 2024-04-17
- 修回日期: 2024-06-23
- 录用日期: 2024-07-04
- 网络出版日期: 2024-07-23

Failure study of gradient bimaterial negative Poisson's ratio honeycomb sandwich panels subjected to local impact

XIAO Junhua^{1, 2
, ,},
WAN Wuju^{1, 2},
GUO Zhixi³,
LIANG Xi^{1, 2}

1.
Department of Engineering Mechanics, Yanshan University, Qinhuangdao 066004, China
2.
Hebei Key Laboratory of Mechanical Reliability for Heavy Equipments and Large Structures, Yanshan University, Qinhuangdao 066004, China
3.
Department of Engineering Mechanics, Hohai University, Nanjing 211100, China

Funds: Central Guiding Local Science and Technology Development Fund Projects (236Z1009G)

摘要

摘要: 夹芯板结构具有轻质、高抗弯刚度和良好的抗冲击等特性，将负泊松比材料作为夹芯板芯层，可以设计出具有优良动力学特征的防护结构。本文基于提出的双材料曲边内凹负泊松比胞元，通过改变胞元内纵横向材料，构建了正梯度、负梯度、对称正梯度及对称负梯度四种排列的负泊松比多胞蜂窝夹芯板。实验与仿真结果比较说明了本文数值方法的可行性。数值研究了不同排列方式时蜂窝夹芯板在受局部冲击作用下的失效力学性能，考察了冲头冲击速度和芯层梯度排列模式对夹芯板破坏模式、冲头接触力与能量吸收效果的影响。研究表明：芯层排列模式显著影响夹芯板的冲击破坏模式和冲击动力学性能；梯度双材料设计可以显著增强夹芯板的吸能效果。
- 负泊松比 /
- 双材料胞元 /
- 梯度材料结构 /
- 冲击失效模式 /
- 能量吸收
Abstract: The sandwich panel structure, known for its lightweight nature, high bending stiffness, and exceptional impact resistance, can be tailored with a core layer of negative Poisson's ratio materials. This design approach yields protective structures with outstanding dynamic characteristics. In this paper, a negative Poisson's ratio biomaterial cellular sandwich plate with positive gradient, negative gradient, symmetric positive gradient and symmetric negative gradient was constructed by changing the vertical and horizontal materials in the cell based on the proposed curved edge concave negative Poisson's ratio biomaterial cell. The comparison between experimental results and simulation results demonstrates the feasibility of the numerical method proposed in this paper. The effects of punch impact velocity and gradient arrangement on the failure mode of sandwich plate, punch contact force and energy absorption were investigated. The results show that the impact failure mode and impact dynamic performance of the sandwich panels are significantly affected by the arrangement mode of core layers. This design can significantly enhance the energy absorption effect of sandwich panels.
- negative Poisson’s ratio /
- bimaterial cell /
- gradient material structure /
- impact failure mode /
- energy absorption

HTML全文

图 1 梯度双材料负泊松比蜂窝夹芯板与边界条件示意图

Figure 1. Schematic diagram of gradient bimaterial honeycomb sandwich plate with negative Poisson's ratio and boundary conditions

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图 2 梯度双材料负泊松比夹芯板示意图

Figure 2. Schematic diagram of gradient bimaterial honeycomb sandwich plate with negative Poisson's ratio

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图 3 夹芯板与冲头网格图

Figure 3. Mesh diagram of sandwich plate and punch

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图 4 3D打印试件与仿真模型

Figure 4. 3D printing specimen and simulation model

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图 5 夹芯板压缩穿透实验平台

Figure 5. Compression penetration test platform of sandwich plate

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图 6 局部穿透后实验和模拟中夹芯板试件破坏模式

Figure 6. Failure modes of sandwich plate specimens in experiment and simulation during local penetration

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图 7 夹芯板局部穿透过程中冲头的接触力-位移曲线

Figure 7. Contact force-displacement curve of punch during local penetration of sandwich plate

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图 8 四种梯度双材料蜂窝夹芯结构

Figure 8. Four gradient bimaterial honeycomb sandwich structures

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图 9 10 m/s冲击速度时不同芯层排布夹芯板破坏模式

Figure 9. Failure mode of sandwich plate with different core arrangement at 10 m/s impact speed

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图 10 30 m/s冲击速度时不同芯层排布夹芯板破坏模式

Figure 10. Failure mode of sandwich plate with different core arrangement at 30 m/s impact speed

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图 11 10 m/s速度时不同芯层夹芯板的接触力-时间曲线

Figure 11. Contact force-time curve of sandwich plates with different core layers at 10 m/s speed

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图 12 30 m/s速度时不同芯层夹芯板的接触力-时间曲线

Figure 12. Contact force-time curve of sandwich plates with different core layers at 30 m/s speed

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图 13 10 m/s速度时不同梯度夹芯板的能量吸收

Figure 13. Energy absorption of sandwich panels with different gradients at a speed of 10 m/s

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图 14 30 m/s速度时不同梯度夹芯板的能量吸收

Figure 14. Energy absorption of sandwich panels with different gradients at a speed of 30 m/s

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图 15 10 m/s冲击速度时夹芯板各部分能量吸收值

Figure 15. Energy absorption value of each part of the sandwich plate at 10 m/s impact velocity

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图 16 30 m/s冲击速度时夹芯板各部分能量吸收值

Figure 16. Energy absorption value of each part of the sandwich plate at 30 m/s impact velocity

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表 1 材料性能

Table 1. Material properties

Materials	Density/ (g·cm⁻³)	Young's modulus /GPa	Poisson's ratio
2024 Aluminum	2.7	73	0.33
Cast-iron	7.2	150	0.3
4340 Steel	7.85	207	0.29
A/MPa	B/MPa	n	C
369	684	0.73	0.0083
525	650	0.6	0.0205
910	586	0.26	0.014
	m	D₁	D₂
	1	0.112	0.123
	1	0.029	0.44
	1.03	−0.8	2.1
	D₃	D₄	D₅
	−1.5	0.007	0
	−1.5	0	0
	−0.5	0.002	0.61
Notes: A−Initial yield stress at reference strain rate and reference temperature；B, n−Strain hardening modulus and hardening index of the material；C−Material strain rate strengthening parameter；m−Thermal softening index of material；D₁, D₂, D₃, D₄, D₅−Failure parameters in the damage formula.

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表 2 纵横向材料组合方式

Table 2. Vertical and horizontal material combination

Modulus ratio E₁/E₂	Vertical/transverse materials
1.38	4340 Steel/Cast-iron
1	Cast-iron /Cast-iron
0.48	2024 Aluminum / Cast-iron

下载: 导出CSV

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